United States

Department

of Agriculture

Forest Service

Rocky Mountain

Research Station

Resource Bulletin

RMRS-RB-2

January 2002

Arizona’s Forest

Resources, 1999

Renee A. O’Brien
Rocky Mountain Research Station

324 25th Street

Ogden, UT 84401

The use of trade or firm names in this publication is for reader information and does not

imply endorsement by the U.S. Department of Agriculture or any product or service.

The Author ___________________

Renee A. O’Brien is Lead Ecologist and Analysis

Team Leader with the Interior West Resource Inventory,

Monitoring, and Evaluation Program at the Rocky Mountain Research Station in Ogden, UT. She holds a B.S.

degree in botany from Weber State University and B.S.

and M.S. degrees in range science from Utah State

University.

Abstract ____________________________________________

O’Brien, Renee A. 2002. Arizona’s Forest Resources, 1999. Resour. Bull. RMRS-RB-2. Ogden, UT:

U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 116 p.

This report presents a summary of the most recent inventory information for Arizona’s forest lands. Much

of the data are from the inventory completed in 1999 that included National Forest System lands and reserved

lands. This report includes tables and highlights of area, number of trees, biomass, volume, growth, mortality,

successional stage, understory vegetation, removals, and net change. Most of the tables are organized by

forest type, species, diameter class, or owner group. The report also explains inventory design and inventory

terminology, and discusses data reliability.

Results show that roughly 27 percent of the area of Arizona is forest land, and that about 59 percent of the

forest land is administered by government agencies. About 9 percent of the forest land in Arizona is reserved

from being utilized for wood products. The most common forest type is pinyon-juniper, comprising 40 percent

of the total forest land. The tree species estimated to have the highest percent of the total number of trees

is twoneedle pinyon, with 17 percent. Ponderosa pine is estimated to make up 38 percent of the total biomass,

and 35 percent of the total cubic foot volume. The total volume of wood in live trees in Arizona is estimated

to be over 15.5 billion cubic feet. The net volume of growing stock on nonreserved timberland (species

traditionally harvested for lumber) is over 6.2 billion cubic feet, with almost 68 percent of that occurring on

lands administered by the National Forest System.

Keywords: forest land area, forest inventory, number of trees, biomass, volume, growth, mortality, forest

type, double sampling

Acknowledgments ____________

The Rocky Mountain Research Station gratefully acknowledges the cooperation and assistance of the Southwestern Region, Forest Service, U.S. Department of

Agriculture; the Arizona State Forester and other Arizona

State Land Department personnel; the Bureaus of Land

Management and Indian Affairs, and the National Park

Service, U.S. Department of the Interior. A special note

of thanks to private landowners who provided information and access to field sample plots.

Cover: Landsat TM image of Utah from Edwards and others (1995)

and Homer and others (1997) with field plot and county overlay.
Highlights _____________________________________

Area

• The total land area of Arizona is almost 73 million acres. Roughly 27 percent or 19.4

million acres is forest land.

• Pinyon-juniper and pure juniper forest types combined occupy almost 10.9 million

acres or 56 percent of the forest land.

• Forty-two percent of the forest land is administered by the USDA Forest Service, and

41 percent is private, which includes Indian Trust land. Seven percent is administered

by the USDI Bureau of Land Management, 6 percent is State owned, and the remaining

4 percent is other public.

• About 9 percent of the forest land in Arizona is in reserved status.

Biomass and Volume

• The total biomass in live trees in Arizona forests is estimated to be over 287 million tons.

• Total volume of wood in live trees in Arizona is estimated to be in excess of 15.5 billion

cubic feet.

• Ponderosa pine makes up 38 percent of the total biomass and 35 percent of the total

volume.

Growth and Mortality

• Gross annual growth of all trees on forest land in Arizona totaled about 253 million cubic

feet.

• Mortality reduced gross growth by almost 19 percent to about 206 million cubic feet of

net annual growth.

• Ponderosa pine alone accounted for 54 percent of the net growth.
Contents ______________________________________

Page

Introduction .............................................................................................................. 1

Methods ................................................................................................................... 2

Overview of Tables .................................................................................................. 5

Highlights of Inventory Results for Total Forest Land .............................................. 6

Area ...................................................................................................................... 6

Forest type......................................................................................................... 6

Stand-size class ................................................................................................ 8

Stand age .......................................................................................................... 8

Stand density index ........................................................................................... 8

Basal area class ................................................................................................ 9

Habitat type ..................................................................................................... 10

Number of Trees ................................................................................................. 10

Biomass and Volume .......................................................................................... 12

Growth and Mortality ........................................................................................... 12

Aspen .............................................................................................................. 14

Understory Vegetation and Ground Cover ......................................................... 14

Highlights of Inventory Results for Nonreserved Timberland ................................. 15

Area, Volume, and Net Growth ........................................................................... 15

Removals ............................................................................................................ 18

Components of Change ...................................................................................... 19

Standard Forest Inventory and Analysis Terminology ........................................... 20

References ............................................................................................................. 29

Appendix A: Common name, scientific name, and timberland (T) or

woodland (W) designation for trees .................................................................... 31

Appendix B: Volume and Biomass Equation Sources ........................................... 32

Forest Inventory and Analysis Tables .................................................................... 33

Total Forest Land ................................................................................................ 33

Nonreserved Forest Land ................................................................................... 61

Nonreserved Timberland .................................................................................... 77

Nonreserved Woodland ...................................................................................... 99

Core Tables ...................................................................................................... 107
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 1

Introduction ____________________________________________________

This report presents a summary of the most recent inventory data available

for Arizona’s forest lands. Much of the data in this report are from the

inventory started in 1995 and completed in 1999 (referred to as the 1999

inventory) by the USDA Forest Service, Interior West Resource Inventory,

Monitoring, and Evaluation (IWRIME) Program, as part of their Forest

Inventory and Analysis (FIA) activities. The 1999 inventory employed a new

sampling design called the mapped plot design.

Land classification categories are individually defined in the terminology

section of this report. However, an overview of the classification relationships may provide a better understanding of how these groups are subdivided. Land area is divided into forest and nonforest (fig.1). Nonforest

includes rangelands, agriculture, urban lands, and water, and may have a

small amount of tree cover. Within both classifications, the land may be

reserved or nonreserved, which means that, in the case of forest land,

nonreserved forest land is available for tree utilization, reserved forest land

is not. Forest found in wilderness areas or National Parks typifies reserved

forest land.

Forest land is subdivided into timberland and woodland. Timberland

includes forests of tree species traditionally used in the forest products

industry, such as ponderosa pine and Douglas-fir. Woodland includes tree

species that typically have a multistem growth form and are not traditionally

used for industrial wood products, such as pinyon, juniper, and oak. A

location was classified as timberland or woodland depending on which

category of species made up the majority of the stocking.

The 1999 inventory included National Forest System lands, some Indian

reservations, areas in reserved status, and all timberland regardless of

owner. New data were not collected for nonreserved woodlands outside the

National Forest System. Instead, data from the previous Arizona inventory

Arizona’s Forest Resources,

1999

Renee A. O’Brien

Figure 1—Land classification for FIA reporting, Arizona, 1999.

Tim berland W oodland

Reserved

Tim berland W oodland

Nonreserved

Forest

Reserved Nonreserved

N on forest

Land Area
2 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

(Conner and others 1990) and from a 1990 to 1991 Navajo Indian Reservation

inventory were recompiled to be comparable to the design and definitions of

the 1999 inventory and combined with the mapped plot design results to

produce this report (fig. 2).

Emphasis in this report is placed on the total forest land resource, including

species diversity, forest health, and land use issues, as well as the more

traditional estimates such as volume, growth, mortality, and removals.

Other types of information included in this report are the occurrence and

cover of understory species, estimates of biomass, and occurrence of habitat

types. Scientific and common names for all plant species included in this

paper are listed in appendix A.

The 1999 inventory was made possible through a major cooperative effort

between many Federal and State agencies. The field work, data compilation,

and analysis were conducted and partially funded by the IWRIME program.

Significant funding was also provided by the USDA Forest Service Southwestern Region through a cooperative agreement between the Rocky Mountain Research Station (RMRS) and the National Forest System that resulted

in an expanded inventory that included National Forest System lands.

Substantial cooperation in terms of logistical assistance was received from

the Arizona State Land Department, Forestry Division, and all other public

and private landowners including the American Indian Tribes. Data are also

being reported separately for the six National Forests in Arizona.

Comparison with forest statistics previously reported for Arizona (Conner

and others 1990) should be restricted to area estimates. Methods for obtaining area data are fairly consistent over time, but even the definition of forest

land has fluctuated. Estimation of other attributes such as volume or growth

will vary due to procedural and definition changes.

Methods _______________________________________________________

The data in this report represent all forest land, including all owners and

land status. IWRIME uses a two-phase or double sampling procedure

(Cochran 1963) for State inventories. The first, or remotely sensed, phase

was based on a grid of sample points systematically located across all lands

in the State. A forest cover type map of the United States (Powell and others

1993), which is based on Advanced Very High Resolution Radiometer

(AVHRR) satellite imagery (fig. 3), was used to obtain timberland, woodland,

or nonforest cover information on 295,153 points in Arizona. This designation, along with other geopolitical information, was then used to stratify field

plots.

Field crews conducted the second, or field, phase of the inventory on a

subsample of the phase one points that occurred on forest land (USDA Forest

Service 1995). This is land that had at least 5 percent cover of species

classified as trees (timber or woodland species), had at least 40 tally tree

species seedlings or saplings per acre, or is currently without cover but

formerly had at least 5 percent cover with tally tree species, and human

activity on the site does not preclude natural succession. The sampling

intensity used in the 1999 inventory for the National Forest System,

National Park Service, some Indian reservations, and all reserved land was

roughly one field plot every 3 miles. A grid of one-half that intensity was used

to sample all other land.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 3

Figure 2—Distribution of inventory plots by intensity and design, Arizona, 1999.
4 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Figure 3—Advanced very high resolution radiometer (AVHRR) forest cover types for Arizona

(Powell and others 1993).
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 5

The mapped plot design is a cluster of four points spaced 120 feet apart.

Each point serves as the center of a 1⁄24-acre circular subplot used to sample

trees 5.0 inches in diameter at breast height (d.b.h.) or root collar (d.r.c.), and

larger. A 1⁄300-acre circular microplot, located at the center of the subplot, was

used to sample seedlings and saplings (trees up to 4.9 inches d.b.h or d.r.c.).

Forest and adjacent nonforest conditions were delineated (mapped) and

recorded. Condition classes were defined by five attributes: forest/nonforest,

forest type, stand-size class, stand origin, and stand density. All attributes

measured on each location were assigned to their respective condition class.

A total of 8,588 field plots were evaluated, of which 2,763 were at least

partially forested. This number includes 798 woodland plots from older

surveys, the design for which is described in Conner and others (1990).

IWRIME inventories provide a probability-based sample of forest resources across all ownerships that can be used for planning and analyses at

local, State, regional, and national levels. The sample was designed to meet

national standards for precision in State and regional estimates of forest

attributes.

A measure of the variability of inventory statistics is provided by standard

errors, listed in table 2 for estimates of area, volume, growth, and mortality,

on forest land for the entire State. A 95 percent confidence interval can be

computed for any estimate by multiplying the estimate’s percent standard

error (SE) by 1.96, multiplying that product times the estimate, and then

adding and subtracting that product from the estimate to get the bounds. The

95 percent confidence interval for total forest land area in Arizona is between

18.9 and 19.9 million acres. Similarly, the estimate of total forest land volume

ranges between 14.9 and 16.2 billion cubic feet.

Users may compute statistical confidence for subdivisions of the reported

data using the formula below. Because sampling error increases as the area

or volume considered decreases, users should aggregate data cells as much

as possible. Sampling errors obtained from this method are only approximations of reliability because this process assumes constant variance across all

subdivisions of totals. The formula is:

 

SE SE Y

Y g

t t

g

=

ˆ

ˆ

where:

SEg = approximate percent standard error of 

Yˆ

g

SEt = percent standard error of 

Yˆ

t

 Yˆ = table variable of interest

g = table cell or group of cells of interest

t = totals from tables 2 or 3.

Overview of Tables______________________________________________

Area of forest land, number of trees, wood volume and biomass, growth,

mortality, and removals are the primary categories for which statistics are

tabulated and presented in the tables. There are five groups of summary

~

~
6 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

tables. Tables 1 through 27 are for all forest land, both reserved and

nonreserved. Tables 28 through 43 are for nonreserved forest land—forest

land not withdrawn from tree utilization through statute or administrative

designation. Tables 44 through 81 are for nonreserved timberland, that is

nonreserved forest land where timber species—those species traditionally

used for industrial wood products—make up at least 10 percent stocking, and

compose at least 51 percent of the total stocking on the site. Tables 82 through

89 are for nonreserved woodland, meaning forest land where timber species

make up less than 51 percent of the total stocking. The last group of tables,

90 through 111, is a core set comparable to similar sets presented by other

FIA groups across the nation and used in the Resources Planning Act

Assessment to represent lands traditionally referred to as “commercial

timberland.” These core tables are for nonreserved timberland that has a

minimum productivity of 20 cubic feet per acre per year. Highlights presented in this report are for total forest land and for nonreserved timberland.

Highlights of Inventory Results for Total Forest Land________________

Area

The State of Arizona encompasses almost 73 million acres (table 1).

Roughly 27 percent of the area or 19.4 million acres is forest land (fig. 4). A

total of 42 percent of the forest land is administered by the USDA Forest

Service, and 41 percent is private, which includes Indian Trust land (fig. 5).

Also, 7 percent is administered by the USDI Bureau of Land Management

(BLM), 6 percent is State owned, and the remaining 4 percent is other public.

About 9 percent of the forest land in Arizona is in reserved status. Unless

otherwise indicated, lands of both reserved and nonreserved status are

included in the statistics in this report.

 The area variables discussed below describe the structure and composition

of Arizona forests. Some of the variables were originally developed to

describe forests in terms of growing stock and timber production, and

consequently had to be adapted for use in describing all trees on all forest

land.

Forest type—Forest type refers to the predominant tree species in a stand,

based on tree stocking, and is one indicator of forest diversity. Table 3 shows

Figure 4—Distribution of land area by land class, Arizona,

1999.

Timberland

Woodland

Nonforest
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 7

Figure 5—Distribution of forest land area by owner

group, Arizona, 1993.

that the pinyon-juniper type is by far the most abundant forest type in the

State, covering over 7.7 million acres, or 40 percent of the forest land. Another

3.1 million acres—almost 16 percent—of Arizona forest land is classified as

pure juniper. Together, the pinyon-juniper and juniper types compose

56 percent of Arizona’s forest land. Figure 6 displays area by land status for

all forest types. Ponderosa pine is the third most abundant forest type with

3.0 million acres, or about 16 percent. Evergreen oak makes up 8 percent of

the area; mesquite, 7 percent; deciduous oak, 2 percent; and Douglas-fir,

aspen, and Engelmann spruce, about 1 percent each. Other miscellaneous

types combined, including nonstocked woodland, make up the remaining

8 percent of the forest land.

0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000

Misc. western hardwoods

Engelmann spruce

Aspen

Douglas-fir

Deciduous woodland oak

Misc. other 

Nonstocked woodland

Mesquite

Evergreen oak

Ponderosa pine

Juniper

Pinyon-juniper

Forest type

Thousand acres

 Nonreserved 

 Reserved 

Owner Group

NFS

Private

BLM

State

Other Public

Figure 6—Area of forest land by forest type and land status,

Arizona, 1993.
8 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Stand-size class—Another variable, stand-size class, classifies forest land

based on the predominant stocking by size of all live trees present (tables 4

through 7) and gives an idea of the overall structure of Arizona forests. Figure

7 shows area of forest land by stand-size class and owner group. This figure

illustrates that relatively few stands are composed mostly of small trees

(sapling/seeding), such as stands that have been harvested or burned. Figure

7 also shows a relatively large amount of nonstocked forest land. Many

sparsely stocked stands in Arizona fall into this category.

Stand age—Figure 8 shows area of forest land by stand age class. Stand

age is an important forest attribute but is difficult to quantify and should be

used with caution. Stand age is computed here using only the ages of trees

within the stand-size class, weighted by trees per acre. If a stand is

nonstocked, the age is set to zero. Based on these criteria, 30 percent of all

forest stands in Arizona are estimated to be 51 to 100 years old, and another

30 percent are estimated to be 101 to 150 years old (table 11). Because trees

of all ages can occur together, this method of computing stand age will not

necessarily portray old-growth situations.

Stand density index—Stand density index (SDI), as developed by Reineke

(1933), is a relative measure of stand density that quantifies the relationship

between trees per acre, stand basal area, average stand diameter, and

stocking of a forested stand. The concept was developed for even-aged stands

but can also be applied to uneven-aged stands (Long and Daniel 1990). SDI

is usually presented as a percentage of the maximum SDI for each forest type

(USDA Forest Service 1993). SDI was computed for each location using those

maximums, and the results were grouped into six classes (fig. 9). A site is

considered to be fully occupied at 35 percent of SDI maximum, which marks

the onset of competition-related stresses and slowed growth rates. IWRIME

Figure 7—Area of forest land by stand-size class and owner group,

Arizona, 1999.

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

Large (Sawtimber) Medium (Poletimber) Sapling/seedling Nonstocked

Stand-size class

Thousand acres

Private

Other public

NFS
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 9

Figure 8—Area of forest land by stand age class, Arizona, 1999.

0

1,000

2,000

3,000

4,000

5,000

6,000

 Unclassified 1-50 51-100 101-150 151-200 201-250 251-300 301-350 351+

Age class

Thousand acres

0

1,000

2,000

3,000

4,000

5,000

6,000

 < 10 10.0-24.9 25.0-34.9 35.0-49.9 50.0-59.9 60 + 

Stand density index class

Thousand acres

Figure 9—Area of forest land by stand density index (SDI), Arizona, 1999.

estimates that 35 percent of all forest stands in Arizona are at or above 35

percent of SDI maximum.

Basal area class—Basal area (BA) is the cross-sectional area of a tree

stem, expressed in square feet. The sum of the BA of all trees in a stand is an

indicator of the degree to which the site is being utilized for growth. High

levels of BA indicate dense stands that may have a high potential for

catastrophic fire and are also vulnerable to attack by insects or disease. Table

10 presents area of forest land by forest type and basal area class. Focusing

on one forest type, figure 10 illustrates area of ponderosa pine forest type by
10 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

BA class and shows that a high proportion (74 percent) of the ponderosa pine

forest type in Arizona has greater than 75 square feet of BA.

Habitat type—Habitat types describe lands in terms of their potential to

produce similar plant communities at successional climax. The climax plant

community, which is the theoretical end result of plant succession, reflects

the integration of environmental factors that affect vegetation such as soils,

climate, and landform. Habitat type classifications are named for the

predominant overstory and understory plant species at the time of successional climax. In the 1999 inventory, Arizona forests, including woodlands,

were classified using Stuever and Hayden (1996). Table 13 presents area of

forest land by habitat type series and forest type, to give a general indication

of forest successional status for the State. The 798 woodland locations from

older surveys were not classified by habitat type, and therefore will show up

in the unclassified column. Although presented for the entire State, this

concept is more meaningful, and more widely used at the site level.

Number of Trees

The composition of the forest by individual tree species is another indicator

of forest diversity. Figure 11 displays the distribution of number of live trees

on Arizona forest land for the most abundant species. Twoneedle pinyon is

estimated to make up the highest percentage of number of trees in Arizona

with 17 percent; ponderosa pine, 16 percent; Gambel oak, 14 percent; Utah

juniper, 11 percent; Arizona white oak and alligator juniper, each 6 percent;

oneseed juniper, 5 percent; Douglas-fir, mesquite, and Emory oak, each 3

percent; and aspen and silverleaf oak, each 2 percent. Other species tallied

in the inventory, each of which composed less than 2 percent of the total

Figure 10—Area of ponderosa pine forest type by basal area class,

Arizona, 1999.

0

100

200

300

400

500

600

700

800

900

1,000

0-25 26-50 51-75 76-100 101-150 151-200 201-250 251+

Basal area class

Thousand acres
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 11

number of trees, are New Mexico locust, white fir, border pinyon, Arizona

pinyon pine, Rocky Mountain juniper, Engelmann spruce, singleleaf pinyon,

evergreen oak, Arizona cypress, bigtooth maple, southwestern white pine,

corkbark fir, desert ironwood, Mexican blue oak, Mexican pinyon pine,

Chihuahua pine, subalpine fir, redberry juniper, California juniper, blue

spruce, cottonwood, Apache pine, boxelder, and Rocky Mountain maple

(table 14).

Size distribution of individual trees indicates structural diversity. Figure

12 displays number of trees on forest land by diameter class (both d.b.h. and

d.r.c.), showing many more small than large trees. In terms of sheer numbers,

59 percent of all live trees are less than 5 inches in diameter (table 14).

Dead trees are an important component of forest ecosystems, providing

habitat for many species of wildlife and functioning as nutrient sinks. There

are roughly 131 million standing dead trees greater than 5.0 inches diameter

(snags) in Arizona (table 15). The number includes snags of all species and

degree of decay. Many wildlife species are dependent on snags, but the

species, size, and density of snags required vary according to the species of

wildlife. Larger snags are relatively scarce in relation to smaller snags.

Considering snags 11 inches in diameter or larger, Arizona forests average

2.5 snags per acre. Of the very large snags (19 inches in diameter or larger),

Arizona has about 0.6 per acre. The most abundant species of snag overall,

and the most abundant species of snag in the 19 inch and larger category, is

ponderosa pine.

These numbers represent averages over the total forest land area. Standing dead trees were only actually tallied on 38 percent of the forest land area

and 59 percent of the timberland area. Snags are difficult to sample adequately (Bull and others 1990). They are fewer in number and may be less

randomly distributed than live trees—occurring in patches because of fire,

disease, insect outbreaks, and so forth.

Figure 11—Number of live trees on forest land by species, Arizona, 1999.

0 100 200 300 400 500 600 700 800 900

Other

Silverleaf oak

Aspen

Emory oak

Douglas-fir

Mesquite

Oneseed juniper

Alligator juniper

Arizona white oak

Utah juniper

Gambel oak

Ponderosa pine

Twoneedle pinyon

Species

Million trees
12 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

 Biomass and Volume

The total biomass in live trees in Arizona forests is estimated to be 287.3

million tons. Biomass includes boles, bark, and branches of all live trees

including saplings. Biomass is presented by species in figure 13 and by

species and diameter class in table 16. The species estimated to have the

greatest total biomass is ponderosa pine, with 38 percent of the total biomass

in the State.

Total volume of wood in live trees in Arizona is estimated to be in excess of

15.5 billion cubic feet. This includes trees 5.0 inches in diameter and larger.

Figure 14 shows cubic-foot volume by species, table 18 shows cubic-foot

volume by species and owner, and table 19 shows volume by species and

diameter class. The species estimated to have the most cubic-foot volume in

Arizona is ponderosa pine, with 35 percent of the total.

Growth and Mortality

Growth, as reported here, is the average annual growth over a 10-year

period based on increment core measurements. It is reported for the year

prior to the year of inventory. Gross annual growth of all trees on forest land

in Arizona totaled about 253 million cubic feet. Net annual growth is the

difference between gross growth and losses due to mortality. Mortality is the

average annual net volume of trees that have died in the 5 years prior to the

year of inventory. Mortality reduced gross growth by almost 19 percent to

about 206 million cubic feet of net annual growth. About 58 percent of the net

annual growth in Arizona occurred on lands under National Forest System

management. Ponderosa pine alone accounted for 54 percent of the net

growth.

Figure 12—Number of live trees on forest land by 2-inch diameter

class, Arizona, 1999.

0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30+

Two-inch diameter class

Million trees
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 13

0 10 20 30 40 50 60 70 80 90 100 110 120

Other

Rocky Mountain juniper

Southwestern white pine

Silverleaf oak

Engelmann spruce

White fir

Mesquite

Aspen

Emory oak

Alligator juniper

Douglas-fir

Gambel oak

Arizona white oak

Oneseed juniper

Twoneedle pinyon

Utah juniper

Ponderosa pine

Species

Million tons

0123456

Other

Southwestern white pine

Arizona pinyon pine

Rocky Mountain juniper

Mesquite

Emory oak

White fir

Engelmann spruce

Aspen

Gambel oak

Arizona white oak

Douglas-fir

Alligator juniper

Oneseed juniper

Twoneedle pinyon

Utah juniper

Ponderosa pine

Species

Billion cubic feet

Figure 13—Oven-dry weight of biomass of all live trees by species on forest land,

Arizona, 1999.

Figure 14—Net cubic foot volume by species on all forest land, Arizona, 1999.
14 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Tree mortality in Arizona was high for some species and size classes (table

24). Mortality exceeded growth for the year prior to the inventory year (1998)

for subalpine fir, meaning that the overall net annual growth of subalpine fir

as a species is negative (table 22). Many species have negative growth in some

diameter classes. Disease was estimated to be the primary cause of death,

followed by insects and fire. It should be noted that exact cause of death is

sometimes unknown, or is the result of a combination of factors.

Aspen—Aspen-dominated stands are currently a minor component of

Arizona forests. Only about 147,000 acres currently have the aspen stocking

required to be considered aspen forest type by FIA definitions. Information

from various sources (Bartos 1995; Bartos and Campbell 1998; Johnson

1994) indicates that this important forest type is declining in much of its

western range. Aspen forests are unusual because they reproduce primarily

by suckering from the parent root system. Often a disturbance or dieback is

necessary to stimulate regeneration of the stands. Evidence suggests that

aspen root systems have existed for thousands of years; and because of this,

even minor amounts of aspen in a stand probably indicate that the site was

at one time dominated by aspen. In an attempt to shed more light on this

issue, each location in the inventory data base was examined for any presence

of aspen. An estimated 633,000 acres in Arizona have at least one live or dead

aspen tree present. This number indicates that under certain conditions,

more Arizona forest land could be dominated by aspen. It does not imply that

all 633,000 acres were ever simultaneously dominated by aspen.

Understory Vegetation and Ground Cover

In addition to information about the forest overstory, the average crown

canopy cover of shrubs, forbs, and graminoids (grasslike plants) by layer, as

well as percent bare ground, were collected at each field location. Where

forest was sampled, crews also recorded the name, percent crown canopy

cover, and height layer of up to four individual species in each lifeform that

had 5 percent or more cover. Table 26 summarizes lifeform cover percent,

percent bare ground, total number of species recorded, most common understory species encountered with 5 percent cover or greater, and number of

locations by forest type.

The highest average percent bare ground (24 percent) is found in the

miscellaneous western hardwood forest type (primarily made up of New

Mexico locust and ironwood). The highest percent average cover of shrubs (24

percent) also occurred in the miscellaneous western hardwood type, compared to the lowest average shrub cover (1 percent) in the blue spruce type.

The highest amount of average forb cover (15 percent) and the highest

amount of average grass cover (24 percent) was found in the mesquite type.

Figure 15 shows the 10 most common species encountered with 5 percent

cover or greater on Arizona forest land by the number of field locations on

which they were found. The species to be encountered most often with

5 percent or greater cover on all forest land is shrub live oak, found on

18 percent (498) of all locations. Blue grama was the second most common,

and sideoats grama was third, found on 16 percent (443) and 10 percent (286)

of all locations, respectively.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 15

Highlights of Inventory Results for Nonreserved Timberland ________

Area, Volume, and Net Growth

Because of the importance of wood products, some additional summaries

for nonreserved timberland are useful. Just over 18 percent (3.6 million

acres) of the forest land in Arizona is nonreserved timberland. The area of

nonreserved timberland by owner group and productivity class is presented

in figure 16 and tables 44 through 47. About 54 percent of the lands capable

of producing more than 50 cubic feet per acre per year are on National

Forests—the remainder is in private ownership. The distribution of

nonreserved timberland by owner group and stand volume class is presented

in figure 17 and table 48.

The total net volume of growing stock on nonreserved timberland is over 6.2

billion cubic feet, with almost 68 percent of that occurring on lands administered by the National Forest System. The species composing by far the

greatest percentage of growing-stock volume is ponderosa pine, with 74

percent.

The volume of sawtimber trees on nonreserved timberland in Arizona is

estimated to be over 24.9 billion board feet (Scribner rule) (table 56).

Ponderosa pine accounts for 76 percent of the total sawtimber volume.

Douglas-fir and Engelmann spruce combined account for another 15 percent.

Figure 18 shows sawtimber volume by species for nonreserved timberland.

Net annual growth of growing-stock trees on nonreserved timberland

totaled over 124 million cubic feet (table 67). Figure 19 shows gross growth,

mortality, and removals of growing-stock volume for grouped species on

nonreserved timberland.

Figure 15—Occurrence of the 10 most common understory species on

forest land, Arizona, 1999.

0 50 100 150 200 250 300 350 400 450 500

Sacahuista

Desert ceanothus

Yellow paloverde

Wright’s silktassel

Broom snakeweed

True mountain mahogany

Pointleaf manzanita

Sideoats grama

Blue grama

Shrub live oak

Species

Number of plots
16 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Figure 16—Area of nonreserved timberland by owner group and

productivity class, Arizona, 1999.

Figure 17—Area of nonreserved timberland by owner group and stand

volume class, Arizona, 1999.

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

National Forest Other public Nonindustrial private

Owner group

Million acres

Productivity class

 85-119 

 50-84 

 20-49 

 0-19 

0

100

200

300

400

500

600

700

800

National Forest Other public Nonindustrial private

Owner group

Thousand acres

Stand volume per acre (board feet) 

(Int 1/4") 

Less than 1,500

1,500 to 4,999 

5,000 to 9,999 

10,000+
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 17

Figure 18—Sawtimber volume by species for nonreserved

timberland, Arizona, 1999.

Figure 19—Gross growth, mortality, and removals of growing stock for

grouped species on nonreserved timberland, Arizona, 1998.

0 2 4 6 8 10 12 14 16 18 20

Other

Aspen

White fir

Engelmann spruce

Douglas-fir

Ponderosa pine

Species

Billion board feet (Scribner)

0 20 40 60 80 100 120

Ponderosa pine

Douglas-fir

Other species

True firs

Spruce

Species group

Million cubic feet

Removals

Mortality

Gross growth
18 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Removals

The net volume of growing-stock trees removed from the inventory by

harvesting, cultural operations, land clearing, and changes in land use, is

known as removals. Removals include both the volume processed and the

volume harvested or killed but not utilized. Removals, as reported here, are

based on data from 1 year—1998. Figure 20 shows volume removed from

growing stock inventory by product and owner group. Tables 79 through 81

show harvest and removals by product, species, and owner group in cubic feet

for growing-stock removals, as well as board feet Scribner and International

for sawtimber removals (Keegan and others 2001).

Almost 19 million cubic feet of wood, exclusive of land clearing volume,

were removed from growing stock on Arizona’s nonreserved timberland in

1998. A total of 92 percent of the removals from growing stock were for timber

products, 4 percent were for fuelwood, and 4 percent were not utilized and left

in the woods as logging residues. Sawlogs were the largest component of

removals from growing-stock volume followed by pulpwood, at 69 and 22

percent, respectively. Other products, primarily house logs, made up less

than 1 percent. National Forests supplied 41 percent of the volume removed

from growing stock; other lands—primarily Indian Tribal Trust—supplied

59 percent.

These removals included 79.8 million board feet Scribner log rule or 90.9

million board feet expressed in International 1⁄4-inch log rule. Sawlogs were

the dominant product harvested, accounting for 77 percent of removals.

Pulpwood was 18 percent of sawtimber removals, fuelwood 3 percent, and

other products 1 percent. Two percent of sawtimber removals was timber not

utilized and left in the woods as logging residues.

Figure 20—Volume removed from growing-stock inventory on

nonreserved timberland by product and owner group, Arizona, 1998.

0

1

2

3

4

5

6

7

8

9

10

Pulpwood Sawlogs House logs & other

products

Fuelwood Logging residue

Products

Million cubic feet

All Other

National Forest
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 19

Over 84 percent of the growing-stock and sawtimber volume removed was

ponderosa pine (table 79). Douglas-fir accounted for about 10 percent, with

the remainder primarily spruce and true firs. Altogether, removals reduced

the available standing inventory by only about 0.3 percent of growing stock

and sawtimber (Scribner rule). The harvest attributed to each individual

species was roughly proportional to its share of the total inventory.

Components of Change

Removals and mortality are both components of change that reduce the

amount of growing stock on Arizona’s nonreserved timberlands. Figure 21

shows net annual growth compared to removals. Because growth is annual,

based on an average over 10 years, and removals data are collected for 1 year,

this graph does not necessarily imply a trend. What it does illustrate is that

no species had more wood volume removed in 1 year (1998) than the average

annual net growth. Total growing-stock volume removed was only 15 percent

of total net annual growth of all species of growing-stock trees on nonreserved

timberland in Arizona.

Figure 21—Net annual growth compared to removals by species on

nonreserved timberland, Arizona, 1998.

0

20

40

60

80

100

120

Ponderosa Pine Douglas-fir True Firs Other Species Spruce

Species group

Million cubic feet

Net growth

Removals
20 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Standard Forest Inventory and Analysis Terminology ______________

Basal area (BA)—The cross-sectional area of a tree stem/bole (trunk) at the

point where diameter is measured, inclusive of bark; BA is expressed in

square feet. For timber species the calculation is based on diameter at

breast height (d.b.h.); for woodland species it is based on diameter at root

collar (d.r.c.).

Biomass—The quantity of wood fiber, for trees 1.0 inch in diameter and

larger, expressed in terms of oven-dry weight. Includes aboveground

portions of trees: bole/stem (trunk), bark, and branches. Biomass estimates

can be computed for live and/or dead trees.

Bole—A trunk or main stem of a tree; seedlings and saplings are specified

as having stems rather than boles. Woodland trees are also referenced as

having stems.

Condition—Generally defined as an area of relatively uniform ground

cover, such as homogeneous vegetative cover, meeting minimum size

requirements. A condition class is a categorization of the condition based

on several defining variables: Ground Cover Class, Land Use. See “Condition criteria,” “Ground cover class,” and “Land use.”

Cubic-foot volume (merchantable)—See “Volume.”

Diameter at breast height (d.b.h.)—For timber species: the diameter of

a tree bole/stem (trunk) measured at breast height (4.5 feet above ground);

measured outside the bark. The point of diameter measurement may vary

for abnormally formed trees.

Diameter at root collar (d.r.c.)—For woodland trees: the diameter of a

tree stem(s) measured at root collar or at the point nearest the ground line

(whichever is higher) that represents the basal area of the tree; measured

outside the bark. For multistemmed woodland trees, d.r.c. is calculated

from an equation that incorporates the individual stem diameter measurements. The point of diameter measurement may vary for woodland trees

with stems that are abnormally formed. With the exception of seedlings,

woodland stems qualifying for measurement must be at least 1.0 inch in

diameter or larger and at least 1.0 foot in length.

Diameter class—A grouping of tree diameters (d.b.h. or d.r.c.) into classes

of a specified range. For some diameter classes, the number referenced (for

example, 4, 6, 8 inches) is designated as the midpoint of an individual class

range. For example, if 2-inch classes are specified (the range for an

individual class) and even numbers are referenced, the 6-inch class would

include trees 5.0 to 6.9 inches in diameter.

Field location—A reference to the sample site or plot; an area containing

the field location center (LC) and all sample points, distributed over area

approximately 2.5 acres in size. A field location consists of four subplots and

four microplots.

• Subplot—A 1⁄24-acre fixed-radius area (24-foot horizontal radius) used

to sample trees 5.0 inches d.b.h./d.r.c. and larger and understory

vegetation.

• Microplot—A 1⁄300-acre fixed-radius plot (6.8-foot radius), located at the

center of each subplot, used to inventory seedlings and saplings.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 21

Fixed-radius plot—A circular sample plot of a specified horizontal radius:

1⁄300 acre = 6.8-foot radius (microplot); 1⁄24 acre = 24.0-foot radius (subplot).

Forest industry lands—See “Private lands.”

Forest land—Land that is at least 10 percent stocked with live tally tree

species (timber or woodland species), including land that formerly had such

stocking and that will be regenerated naturally or artificially. The minimum area for classification of forest land is 1 acre and 120-feet wide.

Unimproved roads, trails, streams, and openings in forest areas are

classified as forest land if they are less than 120-feet wide or 1 acre in size.

For field use, sufficient tree crown cover (5 percent cover of tally tree

species) or the presence of sufficient reproduction (40 tally tree species

seedlings/saplings per acre) is used to represent forest land stocking. See

“Tally tree,” “Timber species,” and “Woodland species.”

• Timberland—A subset of forest land, where the designated forest type

is derived from timber species.

• Woodland—A subset of forest land, where the designated forest type is

derived from woodland species.

• Nonstocked forest land—Formerly stocked forest land that currently

has less than 10 percent stocking, but has the potential to again become

10 percent stocked. For example, recently harvested, burned, or

windthrow-damaged areas.

Forest type (traditional Rocky Mountain FIA method)—A classification of forest land based on and named for the tree species presently

forming a plurality of live-tree stocking. Stocking is an expression of the

extent to which growing space is effectively utilized by live trees. Exceptions to the single predominant species concept used for classifying forest

type apply to sites where (1) hardwoods and softwoods occur together in a

stand, or (2) when Engelmann spruce and subalpine fir occur together in

a stand, and in combination they compose the predominant live-tree

stocking. When hardwoods (for example, maple/oak or aspen trees) and

softwoods (for example, Douglas-fir or ponderosa pine trees) occur together

within a stand, forest type is determined as follows: First, the stocking

percents of all softwoods are summed as a group, and then again for

hardwoods, in order to determine which of the two overall groups has the

most live-tree stocking. Next, the individual tree species from the group

with the majority of stocking is selected as the forest type. When Engelmann spruce and subalpine fir (or corkbark fir) occur together in a stand,

and in combination they constitute the predominant live-tree stocking,

forest type is computed using the following criteria: First, all stocking

percents are adjusted from an absolute base to a relative base, where the

sum of all percents are equal to 100 percent. Next, a stand is classified as

an Engelmann spruce type if Engelmann spruce individually is greater

than or equal to 20 percent relative stocking, and subalpine fir is less than

20 percent relative stocking. For all other stands where subalpine fir and

Engelmann spruce together have plurality, the stand is classified as the

spruce-fir type.
22 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Gross annual growth—See “Growth.”

Growing-stock tree—See “Tree class—Sound tree.”

Growth (tree level)—

• Gross annual growth—The average annual increase in the volume of

live trees (less deductions for cull volume).

• Net annual growth—Gross annual growth minus average annual

mortality volume.

Hardwood trees—Trees that are usually broad leaved and deciduous

(leaves that fall off or shed at specific seasons).

Indian Trust lands—See “Private lands.”

Industrial wood—See “Logging residue/products.”

Large trees (Sawtimber trees)—See “Tree-size class.”

Logging residue/products—

• Industrial wood—All commercial roundwood products, excluding

fuelwood.

• Logging residue—The unused portions within the merchantable sections of sound (growing-stock) trees cut or killed during logging operations.

• Primary wood-processing plants—An industrial plant that processes roundwood products, such as sawlogs, pulpwood bolts, or veneer

logs.

• Pulpwood—Roundwood, whole-tree chips, or wood residues that are

used for the production of wood pulp.

• Roundwood—Logs, bolts, or other round sections cut from trees.

Mapped design—A sampling technique that identifies (maps) and separately classifies distinct “conditions” on the field location sample area.

Each condition must meet minimum size requirements. At the most basic

level, condition types include forest land, nonforest land, and water.

Forest land conditions can be further subdivided into separate condition

classes if there are distinct variations in forest type, stand size, stand

origin, and stand density, given that each distinct area meets minimum

size requirements. See “Condition,” “Condition criteria,” “Field location,”

“Forest land,” “Nonforest land,” and “Water.”

Medium trees (Poletimber trees)—See “Tree-size class.”

Microplot—See “Field location.”

Mortality tree—A standing or downed tree, 1.0-inch d.b.h./d.r.c. and larger,

that was live within the past 5 years or at the last inventory. See “Tree lean

angle.”

Mortality volume (annual)—See “Volume.”

National Forest System lands—See “Public lands.”

National Park System lands—See “Public lands.”

Net annual growth—See “Growth.”
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 23

Nonforest land—For the FIA mapped design baseline inventory, nonforest

land includes three main categories: (1) nontree land, (2) nonsampled tree

land, and (3) other tree land.

• Nontree land—This is land that (1) has never supported tree cover/

stocking sufficient for classification as forest land (for example, barren,

alpine tundra), or (2) was formerly tree land, but has been converted to

a nontree land status (for example, cropland, improved pasture).

Other examples of nontree land are improved roads of any width,

graded or otherwise regularly maintained for long-term use, and rightsof-way of all powerlines, pipelines, other transmission lines, and operating railroads. If intermingled in forest areas, unimproved roads and

nonforest strips must be at least 120-feet wide and 1 acre in size to qualify

as nontree land. This category also includes formerly stocked woodland

areas if they are currently nonstocked due to a treatment (for example,

chaining, other land clearing). These areas are treated to eliminate

woodland trees for the purpose of enhancing or providing for nonwood

commodities or uses (for example, increasing herbage production).

• Nonsampled tree land—This is land that currently meets the requirements for forest land, but human activity on the site will preclude the

natural succession of the stand (areas that might be included in this

category are golf courses, cemeteries, picnic grounds, orchards, Christmas tree plantations, and home yards with mowed lawns).

• Other tree land—Land that is 10 percent stocked with trees defined as

“other tree species” (nontally tree species) but has less than 10 percent

stocking in tally tree species. Examples would include land stocked with

tree species such as palo verde, tamerisk, or Russian olive. See “Other

tree species.”

Nonindustrial private lands—See “Private lands.”

Nonreserved forest land—Forest land not withdrawn from management

for production of wood products through statute or administrative

designation.

Nonstocked forest land—See “Forest land.”

Other private lands—See “Private lands.”

Other public lands—See “Public lands.”

Other tree species (nontally species)—All species classified as trees

(Little, Elbert L., Jr. 1979; Checklist of United States Trees; U.S. Department of Agriculture, Agriculture Handbook 541) that have not been

designated as tally tree species. For the purposes of classifying forest land,

only tally tree species are used to determine if minimal stocking requirements have been met. Other tree species include turbinella oak, Russian

olive, acacia, and so forth. See “Nonforest land—Other tree land.”

Poletimber-size trees (Medium trees)—See “Tree-size class.”

Poletimber stands (Medium tree stands)—See “Stand-size class.”

Primary wood-processing plants—See “Logging residue/products.”
24 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Private lands—

• Forest industry—Land owned by a company or an individual(s) operating a primary wood-processing plant.

• Indian Trust—American Indian lands held in fee, or trust, by the

Federal Government, but administered for tribal groups or as individual

trust allotments.

• Nonindustrial private—All private ownerships except forest industry.

• Other private—Privately owned lands other than forest industry or

Indian Trust.

Productivity—The potential yield capability of a stand calculated as a

function of site index (expressed in terms of cubic feet per acre per year).

Productivity values for forest land provide an indication of biological

potential. Timberland stands are classified by the potential net annual

growth attainable in fully stocked natural stands. Woodland stands are

given a default value of 10 cubic feet per acre per year. For FIA reporting,

Productivity Class is a variable that groups stand productivity values

into categories of a specified range. Productivity is sometimes referred to

as “Yield” or “Mean annual increment (MAI).”

Public lands—

• Miscellaneous Federal—Public lands administered by Federal agencies other than the Forest Service, U.S. Department of Agriculture, or the

Bureau of Land Management, U.S. Department of the Interior.

• National Forest System—Public lands administered by the Forest

Service, U.S. Department of Agriculture, such as National Forests,

National Grasslands, and some National Recreation Areas.

• National Park—Public lands administered by the Park Service, U.S.

Department of the Interior, such as National Parks, National Monuments, National Historic Sites (such as National Memorials and National Battlefields), and some National Recreation Areas.

Other public—Public lands administered by agencies other than the

Forest Service, U.S. Department of Agriculture. Includes lands administered by other Federal, State, county, and local government agencies,

including lands leased by these agencies for more than 50 years.

Pulpwood—See “Logging residue/products.”

Removals—The net volume of sound (growing-stock) trees removed from

the inventory by harvesting or other cultural operations (such as timberstand improvement), by land clearing, or by changes in land use (such as

a shift to wilderness).

Reserved land—Land withdrawn from management for production of wood

products through statute or administrative designation. Examples include

Wilderness areas and National Parks and Monuments.

Sapling and seedling stands—See “Stand-size class.”

Saplings—See “Tree-size class.”

Sawlog portion (timber species)—That part of the bole of sawtimber-size

trees between a 1-foot stump and the sawlog top.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 25

Sawtimber-size trees (Large trees)—See “Tree-size class.”

Sawtimber stands (Large tree stands)—See “Stand-size class.”

Seedlings—See “Tree-size class.”

Site index—A measure of forest productivity for a timberland tree/stand.

Expressed in terms of the expected height (in feet) of site trees at an index

age of 50 (or 80 for aspen and cottonwood). Calculated from height-to-age

equations.

Site productivity—See “Productivity.”

Site tree—A timber species tree used to provide an index of site quality.

Timber species selected for site index calculations must meet specified

criteria with regards to age, diameter, crown class, and damage (for

example, no broken or dead top damage).

Snag—A standing dead tree. See “Tree class—Hard dead tree and Soft dead

tree.”

Softwood trees—Coniferous trees that are usually evergreen (retain leaves

year-round), and having needle- or scalelike leaves.

Stand—A community of trees that can be distinguished from adjacent

communities due to similarities and uniformity in tree and site characteristics, such as age-class distribution, species composition, spatial arrangement, structure, and so forth. See “Condition criteria.”

Stand density—A relative measure of stand density that quantifies the

relationship between trees per acre, stand basal area, average stand

diameter, and stocking of a forested stand. Stand density index (SDI),

a widely used measure developed by Reineke (1933), is an index that

expresses relative stand density based on a comparison of measured stand

values with some standard condition. For FIA reporting, the SDI for a site

is usually presented as a percentage of the maximum SDI for the forest

type. Site SDI values are sometimes grouped into SDI classes of a specified

percentage range. Maximum SDI values vary by region.

Standard error—An expression that denotes the precision of an estimate,

obtained by statistical sampling methods.

Stand-size class—A classification of forest land based on the predominant

diameter size of live trees presently forming the majority of live-tree

stocking. Classes are defined as:

• Sawtimber stand (Large tree stand)—A stand at least 10 percent

stocked with live trees, in which half or more of the total stocking is from

live trees 5.0 inches or larger in diameter, and with sawtimber (large

tree) stocking equal to or greater than poletimber (medium tree) stocking.

• Poletimber stand (Medium tree stand)—A stand at least 10 percent

stocked with live trees, in which half or more of the total stocking is from

live trees 5.0 inches or larger in diameter, and with poletimber (medium

tree) stocking exceeding sawtimber (large tree) stocking.

• Sapling/seedling stand—A stand at least 10 percent stocked with live

trees, in which half or more of the total stocking is from live trees less

than 5.0 inches in diameter.
26 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

• Nonstocked stand—A formerly stocked stand that currently has less

than 10 percent stocking, but has the potential to again become 10

percent stocked (for example, recently harvested, burned, or windthrowdamaged areas).

Stocking—An expression of the extent to which growing space is effectively

utilized by live trees.

Stocking condition (class)—A classification of forest land to provide an

indication of the extent to which a site is being utilized by live trees

(including live cull trees).

• Overstocked—Sites at least 100 percent stocked.

• Fully stocked—Sites that are 60 to100 percent stocked.

• Medium to fully stocked—Sites that are 35 to 60 percent stocked.

• Poorly stocked—Sites that are less than 35 percent stocked.

Subplot—See “Field location.”

Tally trees—Tree species that have been selected to be included in the field

inventory/sample. Tally tree species are categorized as “timber” or “woodland” trees. Tally trees are evaluated for a variety of items (for example,

crown class, crown ratio, damage, rotten/missing material, form defect),

and measurements (for example, diameter, height) are taken on each tally

tree. This information is used to obtain estimates of volume, growth, and

mortality for the sample location. Tally tree data can also be used to obtain

estimates for other site variables, such as site quality and health. See “Field

location,” “Timber species,” “Woodland species,” and “Tree-form criteria.”

Timber species—Tree species traditionally used for industrial wood products. These include all species of conifers, except pinyon, juniper, and yew.

Hardwoods included are aspen, box elder, cottonwood (Populus spp.), and

paper birch. Timber species are measured for diameter at breast height.

See “Diameter at breast height (d.b.h.).”

Timberland—See “Forest land.”

Tree class—A classification system based on a tree’s physical characteristics.

• Live trees are classified for Tree Class as follows; timber species are

classified as either a sound tree (also referred to as growing-stock tree),

rough tree, or rotten tree:

– Sound tree (Growing-stock tree)—A live timber species, 5.0-

inches d.b.h. or larger, with less than two-thirds (67 percent) of the

merchantable volume cull, and containing at least one solid 8-foot

section, reasonably free of form defect, on the merchantable portion of

the tree. A live timber species sapling (1.0- to 4.9-inches d.b.h.) is also

included in this category if it is expected to become a sound live tree,

5.0-inches d.b.h. or larger, with good form and vigor.

– Rough tree—A live timber species, 5.0-inches d.b.h. and larger, with

two-thirds (67 percent) or more of the merchantable volume cull, and

more than half of this cull is due to sound dead wood volume loss, or

severe form-defect volume loss (for example, severe sweep, crook,

forks). Also, a live timber species sapling (1.0- to 4.9-inches d.b.h.)

that is not expected to become a sound (growing-stock) tree due to
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 27

defect, or a timber species (5.0-inches d.b.h. and larger) that does not

now, or prospectively, have at least one solid 8-foot section, reasonably

free of form defect, on the merchantable portion.

– Rotten tree – A live timber species, 5.0-inches d.b.h. and larger, with

two-thirds (67 percent) or more of the merchantable volume cull, and

more than half of this cull is due to rotten and/or missing material.

– Live woodland tree

• Dead trees (timber or woodland species) are classified for Tree Class as

follows:

– Hard dead tree (Salvable dead tree)—A standing dead tally tree,

1.0-inch d.b.h./d.r.c. or larger, that has a minimum of one-third of the

original merchantable volume sound (less than two-thirds rotten and/

or missing material). Also, a down-dead tally tree, 1.0-inch d.b.h./d.r.c.

or larger, with a minimum of one-third of the original merchantable

volume sound and intact. See “Downed tree” and “Standing tree.”

– Soft dead tree (Nonsalvable dead tree)—A standing dead tree,

1.0-inch d.b.h./d.r.c. or larger, that has less than one-third of the

original merchantable volume sound (more than two-thirds rotten/

missing material). Also, a down-dead tree, 1.0-inch d.b.h./d.r.c. or

larger, with less than one-third of the original merchantable bole

sound and intact. See “Downed tree” and “Standing tree.”

Tree-size class—A classification of trees based on d.b.h. for timber species

and d.r.c. for woodland species. For woodland trees, with the exception of

seedlings, stems qualifying for measurement must be at least 1.0 inch in

diameter or larger and at least 1.0 foot in length:

• Seedling—An established tree smaller than 1.0-inch d.b.h. for timber

species or 1.0-inch d.r.c. for woodland trees. See “Established seedling.”

• Sapling—A timber species 1.0- to 4.9-inches d.b.h.; also, a singlestemmed woodland tree 1.0- to 4.9-inches d.r.c., or a multistemmed

woodland tree with a cumulative d.r.c. of 1.0 to 4.9 inches.

• Poletimber-size tree or medium tree—A timber species at least 5.0-

inches d.b.h., but smaller than 9.0-inches d.b.h. for a softwood, and

smaller than 11.0-inches d.b.h. for a hardwood. A woodland tree 5.0- to

8.9-inches d.r.c. (single-stem measurement or computed multistem measurement) is also included in this category.

• Sawtimber-size tree or large tree—A timber species that is at least

9.0-inches d.b.h. for a softwood, and at least 11.0-inches d.b.h. for a

hardwood. A woodland tree 9.0-inches d.r.c. and larger (single-stem

measurement or computed multistem measurement) is also included in

this category.

Volume for timber species—

• Annual mortality volume—The net volume contained in timber species (standing or down) that have died over a 1-year period of time. This

estimate is based on a 5-year average. Mortality volume for timber

species can be calculated in terms of cubic feet or board feet. See

“Mortality tree.”
28 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

• Board-foot volume— A board foot is a unit of measure indicating the

amount of wood contained in an unfinished board 1-foot wide, 1-foot long,

and 1-inch thick. Board-foot volume is computed for the sawlog portion

of a sawtimber-size tree; the sawlog portion includes the part of the bole

on sawtimber-size tree from a 1-foot stump to a minimum sawlog top of

7 inches diameter outside bark (d.o.b.) for softwoods, or 9 inches d.o.b.

for hardwoods. Net board-foot volume is calculated as the gross boardfoot volume in the sawlog portion of a sawtimber-size tree, less deductions for cull (limited to rotten/missing material and form defect cull

deductions—referred to as the board-foot merchantability factor).

Board-foot volume estimates are computed in both Scribner and International 1⁄4-inch rule, and can be calculated for live and/or dead (standing

or down) trees. See “Cull deductions.”

• Cubic-foot volume (merchantable)—A cubic-foot is a unit of measure indicating the amount of wood contained in a cube 1 x 1 x 1 foot.

Cubic-foot volume is computed for the merchantable portion of a timber

species tree; the merchantable portion includes that part of a bole from

a 1-foot stump to a minimum 4-inch top d.o.b. Net cubic-foot volume

is calculated as the gross cubic-foot volume in the merchantable portion

of a tree, less deductions for cull (limited to rotten/missing cull deductions—referred to as the cubic-foot merchantability factor). Merchantable cubic-foot volume estimates can be calculated for live and/or

dead (standing or down) trees. See “Cull deductions.”

Volume for woodland trees—

• Annual mortality volume—The net volume contained in woodland

trees (standing or down) that have died over a 1-year period of time. This

estimate is based on a 5-year average. Mortality volume for woodland

trees is calculated in cubic feet. See “Mortality tree.”

• Cubic-foot volume—A cubic-foot is a unit of measure indicating the

amount of wood contained in a cube 1 x 1 x 1 foot. Woodland cubic-foot

volume is computed for trees 5.0 inches and larger in diameter.

– Dead volume—For dead woodland trees, this volume is equal to

gross cubic-foot volume. For live woodland trees, dead volume is

calculated as gross cubic-foot volume times the field crew estimate of

percent sound dead volume loss. Cull deductions are limited to the

merchantable portion of a tree. See “Cull deductions” and “Merchantable portion.”

– Net volume—The gross cubic-foot volume of live woodland trees, less

deductions for rotten and missing material. This estimate includes

volume for dead material on live trees. Cull deductions are limited to

the merchantable portion of a tree. See “Cull deductions” and “Merchantable portion.”

Water—In terms of Ground Cover Classification, water includes streams,

sloughs, estuaries, and canals more than 30 feet in width; and, lakes,

reservoirs, and ponds more than 1 acre in size. Ephemeral and intermittent

streams are classified as land. Water is further classified as “census water”

or “noncensus” water as follows:

• Census water—Rivers, streams, sloughs, estuaries, and canals, more

than 200-feet wide and 4.5 acres and larger in size; only portions of rivers
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 29

and streams meeting the definition criteria are considered census water.

Other census water includes lakes, reservoirs, and ponds more than 4.5

acres and larger in size. Portions of braided streams meeting the census

water definition criteria and more than 50 percent water at normal highwater level are also considered census water.

• Noncensus water—Portions of rivers, streams, sloughs, estuaries, and

canals that are 30- to 200-feet wide and at least 1 acre in size; and lakes,

reservoirs, and ponds 1- to 4.5-acres in size. Portions of rivers and

streams not meeting the criteria for census water, but at least 30-feet

wide and 1 acre in size, are considered noncensus water. Portions of

braided streams not meeting the criteria for census water, but at least

30 feet in width and 1 acre in size, and more than 50 percent water at

normal high-water level are also considered noncensus water.

Wilderness—An area of undeveloped land currently included in the Wilderness System, managed to preserve its natural conditions and retain its

primeval character and influence.

Woodland—See “Forest land.”

Woodland species—Tree species that are not usually converted into

industrial wood products. Common uses of woodland trees are fuelwood,

fenceposts, and Christmas trees. These species include pinyon, juniper

(except Western juniper), oak, mesquite, locust, yew, mountain-mahogany

(Cercocarpus spp.), Rocky Mountain maple, bigtooth maple, and desert

ironwood. Because woodland trees are extremely variable in form, diameter is measured at the root collar. See “Diameter at root collar (d.r.c.).”

References______________________________________________________

Bartos, Dale L. 1995. Aspen problem definition. Unpublished paper

on file at: U.S. Department of Agriculture, Forest Service, Intermountain (now Rocky Mountain) Research Station, Forestry

Sciences Laboratory, Logan, UT.

Bartos, Dale L.; Campbell, Robert B. 1998. Decline of quaking aspen in

the Interior West—examples from Utah. Rangelands. 20(1): 15–22.

Bull, Evelyn L.; Holthausen, Richard S.; Marx, David, B. 1990. How

to determine snag density. Western Journal of Applied Forestry.

5: 56–58.

Chojnacky, David C. 1985. Pinyon-juniper volume equations for the

central Rocky Mountain States. Res. Pap. INT-339. Ogden, UT:

U.S. Department of Agriculture, Forest Service, Intermountain

Forest and Range Experiment Station. 27 p.

Chojnacky, David C. 1988a. Juniper, pinyon, oak, and mesquite

volume equations for Arizona. Res. Pap. INT-391. Ogden, UT:

U.S. Department of Agriculture, Forest Service, Intermountain

Research Station. 11 p.

Chojnacky, David C. 1988b. Woodland volume equations for Arizona Fort Apache and San Carlos Indian Reservations. Res. Note

INT-379. Ogden, UT: U.S. Department of Agriculture, Forest

Service, Intermountain Research Station. 7 p.

Chojnacky, David C. 1992. Estimating volume and biomass for

dryland oak species. In: Ecology and management of oak and

associated woodlands: perspectives in the Southwestern United

States and Northern Mexico; 1992 April 27–30; Sierra Vista, AZ.

GTR-RM-218. Ft. Collins, CO: U.S. Department of Agriculture,

Forest Service, Rocky Mountain Forest and Range Experiment

Station: 155–161.

Chojnacky, David C.; Moisen, Gretchen G. 1993. Converting wood

volume to biomass for pinyon and juniper. Res. Note INT-411.

Ogden, UT: U.S. Department of Agriculture, Forest Service,

Intermountain (now Rocky Mountain) Research Station. 5 p.

Cochran, William G. 1963. Sampling techniques. 2nd ed. New York:

John Wiley and Sons. 413 p.

Conner, Roger C.; Born, J. David; Green, Alan W.; O’Brien, Renee A.

1990. Forest resources of Arizona. Res. Bull. INT-69. Ogden, UT:

U.S. Department of Agriculture, Forest Service, Intermountain

(now Rocky Mountain) Research Station. 92 p.

Hann, David W.; Bare, Bruce B. 1978. Comprehensive tree volume

equations for major species of New Mexico and Arizona: II. Tables

for unforked trees. Res. Pap. INT-210. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Forest and

Range Experiment Station. 127 p.

Johnson, Marlin A. 1994. Changes in Southwestern forests: stewardship implications. Journal of Forestry. 92(12): 16–19.

Keegan, Charles E.; Chase, Alfred L.; Morgan, Todd A.; Bodmer,

Steven E.; Van Hooser, Dwane D.; Mortimer, Michael. 2001.

Arizona’s forest products industry: a descriptive analysis 1998.

The University of Montana, Bureau of Business and Economic

Research, Missoula. 20 p.

Kemp, Paul D. 1958. Volume tables. Unpublished report on file at:

U.S. Department of Agriculture, Forest Service, Intermountain

(now Rocky Mountain) Research Station, Interior West Resource,

Inventory, Monitoring, and Evaluation Program, Ogden, UT.

Little, Elbert L., Jr. 1979. Checklist of United States trees. Agric.

Handb. 541. Washington, DC: U.S. Department of Agriculture.

Long, James N.; Daniel, Theodore W. 1990. Assessment of growingstock in uneven-aged stands. Western Journal of Applied Forestry. 5(3): 93–96.

Powell, Douglas S.; Faulkner, Joanne L.; Darr, David R.; Zhu,

Zhiliang; MacCleery, Douglas W. 1993. Forest resources of the

United States, 1992. Gen. Tech. Rep. RM-234. Fort Collins, CO:

U.S. Department of Agriculture, Forest Service, Rocky Mountain

Forest and Range Experiment Station. 32 p. With separate map.
30 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Reineke, L. H. 1933. Perfecting a stand density index for even-aged

forests. Journal of Agricultural Research. 46: 627–638.

Stuever, Mary C.; Hayden, John S. 1996. Plant associations (habitat types) of the forests and woodlands of Arizona and New

Mexico. Final report submitted to: U.S. Department of Agriculture, Forest Service, Southwestern Region. Contract R3-95-27.

Placitas, NM: Seldom Seen Expeditions, Inc. 520 p.

U.S. Department of Agriculture, Forest Service. 1993. RMSTAND

user’s guide, Chapter 60. Unpublished user’s guide on file at: U.S.

Department of Agriculture, Forest Service, Southwestern Region, Albuquerque, NM.

U.S. Department of Agriculture, Forest Service. 1995. Arizona/

New Mexico, Region 3, Forest Survey field procedures. Unpublished field guide on file at: U.S. Department of Agriculture,

Forest Service, Intermountain (now Rocky Mountain) Research

Station, Forestry Sciences Laboratory, Interior West Resource

Inventory, Monitoring, and Evaluation Program, Ogden, UT.

Van Hooser, Dwane D.; Chojnacky, David C. 1983. Whole tree

volume estimates for the Rocky Mountain States. Res. Bull. INT29. Ogden, UT: U.S. Department of Agriculture, Forest Service,

Intermountain Forest and Range Experiment Station. 69 p.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 31

Appendix A: Common name, scientific name, and timberland (T) or

woodland (W) designation for trees______________________________

Tree Species

Alligator juniper (Juniperus deppeana) W

Apache pine (Pinus engelmannii) T

Arizona cypress (Cypressus arizonica) T

Arizona pinyon pine (Pinus edulis var. fallax) W

Arizona white oak (Quercus Arizonica) W

Aspen (Populus tremuloides) T

Bigtooth maple (Acer grandidentatum) W

Blue spruce (Picea pungens) T

Border pinyon (Pinus discolor) W

Boxelder (Acer negundo) T

California juniper (Juniperus californica) W

Chihuahua pine (Pinus leiophylla) T

Corkbark fir (Abies lasiocarpa var. arizonica) T

Cottonwood (Populus sp.) T

Desert ironwood (Olneya tesota) W

Douglas-fir (Pseudotsuga menziesii) T

Emory oak (Quercus emoryi) W

Engelmann spruce (Picea engelmannii) T

Gambel oak (Quercus gambelii) W

Mesquite (Prosopis spp.)

Mexican blue oak (Quercus oblongifolia) W

Mexican pinyon pine (Pinus cembroides) W

New Mexico locust (Robinia neomexicana var. neomexicana) W

Oneseed juniper (Juniperus monosperma) W

Ponderosa pine (Pinus ponderosa) T

Rocky Mountain juniper (Juniperus scopulorum) W

Rocky Mountain maple (Acer glabrum) W

Redberry juniper (Juniperous erythrocarpa) W

Silverleaf oak (Quercus hypoleucoides) W

Singleleaf pinyon (Pinus monophylla) W

Southwestern white pine (Pinus strobiformis) T

Subalpine fir (Abies lasiocarpa) T

Twoneedle pinyon (Pinus edulis) W

Utah juniper (Juniperus osteosperma) W

Velvet mesquite (Prosopis velutina) W

Western honey mesquite (Prosopis glandulosa v. torreyana) W

White fir (Abies concolor) T

Shrub Species

Broom snakeweed (Gutierrezia sarothrae)

Common juniper (Juniperus communis)

Creosotebush (Larrea tridentata)

Desert ceanothus (Ceanothus greggii)

Sacahuista (Nolina microcarpa)

Pointleaf manzanita (Arctostaphylos pungens)

Shrub live oak (Quercus turbinella)

Skunkbush sumac (Rhus trilobata)
32 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

True mountain mahogany (Cercocarpus montanus)

Yellow paloverde (Parkinsonia microphylla)

Forb Species

Clubmoss (Lycopodium spp.)

Fendler meadowrue (Thalictrum fendleri)

Wright’s silktassel (Garrya wrightii)

Grass Species

Arizona fescue (Festuca arizonica)

Blue grama (Bouteloua gracilis)

Bullgrass (Muhlenbergia emersleyi)

Mountain muhly (Muhlenbergia montana)

Screwleaf muhly (Muhlenbergia virescens)

Sedge (Carex spp.)

Sideoats grama (Bouteloua curtipendula)

Appendix B: Volume and Biomass Equation Sources _______________

Volume

Chojnacky (1985) was used for Rocky Mountain maple, bigtooth maple, and

ironwood volume estimation.

Chojnacky (1988a) was used for juniper, pinyon, Gambel oak, Arizona

white oak, and mesquite volume estimation.

Chojnacky (1988b) was used for silverleaf oak, evergreen oak, Mexican blue

oak, and Emory oak volume estimation.

Equation from North Central Station was used for New Mexico locust

volume estimation.

Hann and Bare (1978) was used for all timber species volume estimation

except cottonwood and boxelder.

Kemp (1958) was used for cottonwood and boxelder volume estimation.

Biomass

Chojnacky (1992) was used for all woodland hardwood biomass estimation.

Chojnacky and Moisen (1993) was used for pinyon and juniper biomass

estimation.

Van Hooser and Chojnacky (1983) was used for all timber species biomass

estimation.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 33

Forest Inventory and Analysis Tables _____________________________

Total Forest Land

Table 1--Total area by ownership class and land class, Arizona, 1999 

Land class 

 Nonreserved Reserved Total Ownership class Forest Nonforest Water Total Forest Nonforest Water Total Forest Nonforest Water Total area 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Land  Public  National Forest 7,220,517 2,520,622 7,947 9,749,087 1,002,159 502,979 -- 1,505,138 8,222,676 3,023,601 7,947 11,254,225  Bureau of Land Management 1,160,959 11,097,262 -- 12,258,221 142,836 1,273,241 -- 1,416,077 1,303,794 12,370,503 -- 13,674,298  National Park -- -- -- -- 490,534 1,991,610 41,635 2,523,779 490,534 1,991,610 41,635 2,523,779  Miscellaneous federal 58,947 1,001,253 -- 1,060,200 116,061 1,567,492 -- 1,683,553 175,008 2,568,745 -- 2,743,753  State 1,184,720 8,467,418 -- 9,652,137 -- 25,402 -- 25,402 1,184,720 8,492,819 -- 9,677,539  County and municipal 39,898 300,703 -- 340,601 -- -- -- -- 39,898 300,703 -- 340,601  Total public 9,665,041 23,387,258 7,947 33,060,246 1,751,590 5,360,723 41,635 7,153,948 11,416,630 28,747,981 49,582 40,214,194  Private  Indian Trust 5,982,721 14,117,172 9,466 20,109,358 66,691 17,149 -- 83,840 6,049,412 14,134,321 9,466 20,193,198  Other private 1,960,930 10,394,603 -- 12,355,533 -- -- -- -- 1,960,930 10,394,603 -- 12,355,533  Total private 7,943,651 24,511,775 9,466 32,464,891 66,691 17,149 -- 83,840 8,010,342 24,528,924 9,466 32,548,731  Total land area 17,608,691 47,899,033 12,413 65,525,137 1,818,281 5,377,872 41,635 7,237,788 19,426,972 53,276,905 59,048 72,762,925 Water -- -- 201,081 201,081 -- -- -- -- -- -- 201,081 201,081  Total land and water 17,608,691 47,899,033 218,494 65,726,218 1,818,281 5,377,872 41,635 7,237,788 19,426,972 53,276,905 260,129 72,964,006 

aSource: U.S. Department of Commerce. 1990 Decennial Census. 

a
34 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 2--Percent standard error for area, volume, growth, and mortality on forest land, Arizona 

 Percent

 Area Volume standard

Land class Attribute (acres) (thousand) error

 

Forest landa Area, 1999 19,426,970 ±1.39 

 Net volume, All live trees (cubic feet), 1999 15,562,510 ±2.13 

 Net annual growth, all tree classes (cubic feet), 1998 206,214 ±3.77 

 Annual mortality, all tree classes (cubic feet), 1998 46,579 ±12.51 

 

Nonreserved forest land: 

Timberland Area, 1999 3,564,960 ±2.87 

 Net volume, 1999: 

 Growing stock (cubic feet) 6,202,590 ±4.01 

 Sawtimber - International 1⁄4 -inch rule (board feet) 28,582,990 ±4.45 

 Sawtimber - Scribner rule (board feet) 24,901,810 ±4.54 

 Net annual growth, 1998: 

 Growing stock (cubic feet) 124,616 ±5.04 

 Sawtimber - International 1⁄4-inch rule (board feet) 661,129 ±5.73 

 Sawtimber - Scribner rule (board feet) 573,224 ±5.76 

 Annual mortality, 1998: 

 Growing stock (cubic feet) 21,021 ±20.27 

 Sawtimber - International 1⁄4-inch rule (board feet) 90,841 ±27.38 

 Sawtimber - Scribner rule (board feet) 77,919 ±28.66 

 

Woodland Area, 1999 14,043,730 ±1.93 

 Net volume, all live trees (cubic feet), 1999 7,120,110 ±2.76 

 Net annual growth, all tree classes (cubic feet), 1998 68,361 ±3.94 

 Annual mortality, all tree classes (cubic feet), 1998 6,137 ±19.19 

 

Reserved forest land:

Timberland Area, 1999 331,600 ±12.27 

 Net volume, Growing stock (cubic feet), 1999 792,990 ±17.83 

 Net annual growth, Growing stock (cubic feet), 1998 2,654 ±106.13 

 Annual mortality, Growing stock (cubic feet), 1998 11,524 ±23.11 

 

Woodland Area, 1999 1,486,680 ±5.14 

 Net volume, all live trees (cubic feet), 1999 779,430 ±8.64 

 Net annual growth, all tree classes (cubic feet), 1998 4,484 ±56.66 

 Annual mortality, all tree classes (cubic feet), 1998 4,678 ±53.68 

a

Includes cull volume on timberland and woodland that is not reported in growing stock numbers. 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 35 Table 3--Area of forest land by forest type, owner group, and land class, Arizona, 1999 Owner group National Forest Other public Nonindustrial private All owners Forest type Nonreserved Reserved Total Nonreserved Reserved Total Nonreserved Reserved Total Nonreserved Reserved Total - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Aspen 56,645 17,634 74,279 -- 26,145 26,145 46,668 -- 46,668 103,313 43,779 147,093 Blue spruce 4,890 -- 4,890 -- -- -- 12,115 -- 12,115 17,006 -- 17,006 Cottonwood 9,196 -- 9,196 -- -- -- 4,530 -- 4,530 13,726 -- 13,726 Deciduous woodland oak 107,344 28,689 136,034 24,264 -- 24,264 151,234 -- 151,234 282,842 28,689 311,532 Douglas-fir 134,979 32,122 167,101 -- -- -- 72,507 -- 72,507 207,487 32,122 239,608 Engelmann spruce 65,006 4,093 69,099 -- 16,226 16,226 42,004 -- 42,004 107,010 20,319 127,329 Evergreen oak 851,275 182,451 1,033,726 64,895 28,913 93,808 488,601 -- 488,601 1,404,771 211,364 1,616,135 Juniper 891,547 61,835 953,382 695,470 51,255 746,724 1,405,962 -- 1,405,962 2,992,979 113,089 3,106,068 Maple woodland -- 8,875 8,875 -- -- -- -- -- -- -- 8,875 8,875 Mesquite 211,887 11,559 223,447 485,020 76,734 561,754 641,343 -- 641,343 1,338,250 88,293 1,426,544 Misc. western hardwoods 19,436 -- 19,436 63,769 14,224 77,993 29,229 -- 29,229 112,434 14,224 126,657 Other western softwoods 37,257 28,717 65,973 -- 4,433 4,433 23,614 -- 23,614 60,870 33,149 94,019 Pinyon-juniper 2,160,293 421,479 2,581,771 971,193 306,967 1,278,160 3,851,204 66,691 3,917,895 6,982,690 795,137 7,777,827 Ponderosa pine 1,981,847 92,040 2,073,887 44,349 77,974 122,323 850,950 -- 850,950 2,877,145 170,014 3,047,159 Spruce-fir 4,890 -- 4,890 -- 6,536 6,536 7,027 -- 7,027 11,918 6,536 18,454 White fir 60,700 11,164 71,864 -- 6,536 6,536 12,519 -- 12,519 73,219 17,700 90,919 Nonstocked timberland 68,943 7,977 76,919 -- -- -- 24,325 -- 24,325 93,268 7,977 101,244 Nonstocked woodland 554,383 93,524 647,907 95,563 133,488 229,051 279,819 -- 279,819 929,764 227,012 1,156,776 All typesa 7,220,517 1,002,159 8,222,676 2,444,523 749,431 3,193,954 7,943,651 66,691 8,010,342 17,608,691 1,818,281 19,426,972 aOn this and all subsequent tables, totals may vary due to rounding. 
36 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 4--Area of forest land by forest type, stand-size class, and productivity class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - 

Aspen 

 Sawtimber -- 68,929 27,275 -- 96,203 

 Poletimber -- 17,348 7,845 -- 25,193 

 Sapling/seedling -- -- 25,696 -- 25,696 

 Nonstocked -- -- -- -- -- 

 Total -- 86,277 60,816 -- 147,093 

Blue spruce 

 Sawtimber 1,580 12,277 -- -- 13,858 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- 3,148 -- -- 3,148 

 Nonstocked -- -- -- -- -- 

 Total 1,580 15,425 -- -- 17,006 

Cottonwood 

 Sawtimber -- -- 10,753 -- 10,753 

 Poletimber -- -- 2,973 -- 2,973 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 13,726 -- 13,726 

Deciduous woodland oak 

 Sawtimber -- -- -- 100,916 100,916 

 Poletimber -- -- -- 110,486 110,486 

 Sapling/seedling -- -- -- 100,130 100,130 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 311,532 311,532 

Douglas-fir 

 Sawtimber 12,446 106,213 98,028 -- 216,687 

 Poletimber -- -- 13,290 -- 13,290 

 Sapling/seedling 4,741 -- 4,890 -- 9,631 

 Nonstocked -- -- -- -- -- 

 Total 17,186 106,213 116,208 -- 239,608 

Engelmann spruce 

 Sawtimber 9,532 86,529 21,638 -- 117,699 

 Poletimber -- -- 6,276 -- 6,276 

 Sapling/seedling -- -- 3,354 -- 3,354 

 Nonstocked -- -- -- -- -- 

 Total 9,532 86,529 31,268 -- 127,329 

Evergreen oak 

 Sawtimber -- -- -- 1,372,950 1,372,950 

 Poletimber -- -- -- 199,796 199,796 

 Sapling/seedling -- -- -- 43,389 43,389 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,616,135 1,616,135 

Juniper 

 Sawtimber -- -- -- 2,549,374 2,549,374 

 Poletimber -- -- -- 499,098 499,098 

 Sapling/seedling -- -- -- 57,597 57,597 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 3,106,068 3,106,068 

Maple woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- 8,875 8,875 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 8,875 8,875 

Mesquite 

 Sawtimber -- -- -- 449,025 449,025 

 Poletimber -- -- -- 801,512 801,512 

 Sapling/seedling -- -- -- 176,006 176,006 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,426,544 1,426,544 

 

 (con.) 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 37

Table 4 (Con.) 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Misc. western hardwoods 

 Sawtimber -- -- -- 43,729 43,729 

 Poletimber -- -- -- 58,751 58,751 

 Sapling/seedling -- -- -- 24,177 24,177 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 126,657 126,657 

Other western softwoods 

 Sawtimber -- 9,844 22,559 37,773 70,176 

 Poletimber -- -- -- 12,806 12,806 

 Sapling/seedling -- 6,321 4,716 -- 11,037 

 Nonstocked -- -- -- -- -- 

 Total -- 16,165 27,275 50,579 94,019 

Pinyon-juniper 

 Sawtimber -- -- -- 5,775,289 5,775,289 

 Poletimber -- -- -- 1,712,800 1,712,800 

 Sapling/seedling -- -- -- 289,739 289,739 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 7,777,827 7,777,827 

Ponderosa pine 

 Sawtimber 17,395 658,571 2,137,716 6,288 2,819,970 

 Poletimber -- -- 137,414 -- 137,414 

 Sapling/seedling -- 18,412 71,364 -- 89,776 

 Nonstocked -- -- -- -- -- 

 Total 17,395 676,983 2,346,493 6,288 3,047,159 

Spruce-fir 

 Sawtimber -- 11,427 7,027 -- 18,454 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 11,427 7,027 -- 18,454 

White fir 

 Sawtimber 4,716 59,457 26,746 -- 90,919 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 4,716 59,457 26,746 -- 90,919 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 18,934 82,310 -- 101,244 

 Total -- 18,934 82,310 -- 101,244 

Nonstocked woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- 1,156,776 1,156,776 

 Total -- -- -- 1,156,776 1,156,776 

All types 

 Sawtimber 45,669 1,013,247 2,351,742 10,335,344 13,746,003 

 Poletimber -- 17,348 167,797 3,395,249 3,580,394 

 Sapling/seedling 4,741 27,881 110,020 699,912 842,555 

 Nonstocked -- 18,934 82,310 1,156,776 1,258,020 

 Total 50,410 1,077,411 2,711,869 15,587,281 19,426,972 
38 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 5--Area of National Forest System forest land by forest type, stand-size class, and 

 productivity class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Aspen 

 Sawtimber -- 21,645 14,202 -- 35,848 

 Poletimber -- 4,890 7,845 -- 12,736 

 Sapling/seedling -- -- 25,696 -- 25,696 

 Nonstocked -- -- -- -- -- 

 Total -- 26,536 47,743 -- 74,279 

Blue spruce 

 Sawtimber -- 1,742 -- -- 1,742 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- 3,148 -- -- 3,148 

 Nonstocked -- -- -- -- -- 

 Total -- 4,890 -- -- 4,890 

Cottonwood 

 Sawtimber -- -- 6,223 -- 6,223 

 Poletimber -- -- 2,973 -- 2,973 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 9,196 -- 9,196 

Deciduous woodland oak 

 Sawtimber -- -- -- 41,179 41,179 

 Poletimber -- -- -- 70,152 70,152 

 Sapling/seedling -- -- -- 24,702 24,702 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 136,034 136,034 

Douglas-fir 

 Sawtimber 12,446 75,998 64,023 -- 152,466 

 Poletimber -- -- 9,745 -- 9,745 

 Sapling/seedling -- -- 4,890 -- 4,890 

 Nonstocked -- -- -- -- -- 

 Total 12,446 75,998 78,658 -- 167,101 

Engelmann spruce 

 Sawtimber 1,631 43,228 17,965 -- 62,823 

 Poletimber -- -- 6,276 -- 6,276 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 1,631 43,228 24,241 -- 69,099 

Evergreen oak 

 Sawtimber -- -- -- 876,945 876,945 

 Poletimber -- -- -- 117,620 117,620 

 Sapling/seedling -- -- -- 39,160 39,160 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,033,726 1,033,726 

Juniper 

 Sawtimber -- -- -- 884,379 884,379 

 Poletimber -- -- -- 37,056 37,056 

 Sapling/seedling -- -- -- 31,947 31,947 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 953,382 953,382 

Maple woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- 8,875 8,875 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 8,875 8,875 

Mesquite 

 Sawtimber -- -- -- 101,808 101,808 

 Poletimber -- -- -- 32,951 32,951 

 Sapling/seedling -- -- -- 88,687 88,687 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 223,447 223,447 

 

 (con.) 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 39

Table 5 (Con.) 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Misc. western hardwoods 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- 19,436 19,436 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 19,436 19,436 

Other western softwoods 

 Sawtimber -- 9,844 22,559 27,052 59,455 

 Poletimber -- -- -- 6,518 6,518 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 9,844 22,559 33,570 65,973 

Pinyon-juniper 

 Sawtimber -- -- -- 2,219,529 2,219,529 

 Poletimber -- -- -- 218,016 218,016 

 Sapling/seedling -- -- -- 144,226 144,226 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 2,581,771 2,581,771 

Ponderosa pine 

 Sawtimber 11,107 344,286 1,582,603 -- 1,937,996 

 Poletimber -- -- 86,680 -- 86,680 

 Sapling/seedling -- 6,603 42,608 -- 49,211 

 Nonstocked -- -- -- -- -- 

 Total 11,107 350,889 1,711,891 -- 2,073,887 

Spruce-fir 

 Sawtimber -- 4,890 -- -- 4,890 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 4,890 -- -- 4,890 

White fir 

 Sawtimber -- 51,654 20,209 -- 71,864 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 51,654 20,209 -- 71,864 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 12,859 64,060 -- 76,919 

 Total -- 12,859 64,060 -- 76,919 

Nonstocked woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- 647,907 647,907 

 Total -- -- -- 647,907 647,907 

All types 

 Sawtimber 25,183 553,288 1,727,784 4,150,892 6,457,147 

 Poletimber -- 4,890 113,518 482,315 600,724 

 Sapling/seedling -- 9,751 73,194 357,034 439,979 

 Nonstocked -- 12,859 64,060 647,907 724,826 

 Total 25,183 580,789 1,978,557 5,638,148 8,222,676 
40 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 6--Area of other publicly owned forest land by forest type, stand-size class, and productivity 

 class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Aspen 

 Sawtimber -- 13,073 13,073 -- 26,145 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 13,073 13,073 -- 26,145 

Blue spruce 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Cottonwood 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Deciduous woodland oak 

 Sawtimber -- -- -- 12,280 12,280 

 Poletimber -- -- -- 11,984 11,984 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 24,264 24,264 

Douglas-fir 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Engelmann spruce 

 Sawtimber -- 16,226 -- -- 16,226 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 16,226 -- -- 16,226 

Evergreen oak 

 Sawtimber -- -- -- 66,560 66,560 

 Poletimber -- -- -- 27,248 27,248 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 93,808 93,808 

Juniper 

 Sawtimber -- -- -- 544,346 544,346 

 Poletimber -- -- -- 185,566 185,566 

 Sapling/seedling -- -- -- 16,812 16,812 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 746,724 746,724 

Maple woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Mesquite 

 Sawtimber -- -- -- 217,076 217,076 

 Poletimber -- -- -- 299,179 299,179 

 Sapling/seedling -- -- -- 45,499 45,499 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 561,754 561,754 

 

 (con.) 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 41

Table 6 (Con.) 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Misc. western hardwoods 

 Sawtimber -- -- -- 43,729 43,729 

 Poletimber -- -- -- 34,263 34,263 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 77,993 77,993 

Other western softwoods 

 Sawtimber -- -- -- 4,433 4,433 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 4,433 4,433 

Pinyon-juniper 

 Sawtimber -- -- -- 799,229 799,229 

 Poletimber -- -- -- 457,323 457,323 

 Sapling/seedling -- -- -- 21,609 21,609 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,278,160 1,278,160 

Ponderosa pine 

 Sawtimber -- 34,771 80,854 -- 115,625 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- 6,698 -- 6,698 

 Nonstocked -- -- -- -- -- 

 Total -- 34,771 87,552 -- 122,323 

Spruce-fir 

 Sawtimber -- 6,536 -- -- 6,536 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 6,536 -- -- 6,536 

White fir 

 Sawtimber -- -- 6,536 -- 6,536 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 6,536 -- 6,536 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Nonstocked woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- 229,051 229,051 

 Total -- -- -- 229,051 229,051 

All types 

 Sawtimber -- 70,606 100,463 1,687,654 1,858,722 

 Poletimber -- -- -- 1,015,564 1,015,564 

 Sapling/seedling -- -- 6,698 83,920 90,618 

 Nonstocked -- -- -- 229,051 229,051 

 Total -- 70,606 107,161 3,016,187 3,193,954 
42 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 7--Area of nonindustrial private forest land by forest type, stand-size class, and productivity 

 class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Aspen 

 Sawtimber -- 34,211 -- -- 34,211 

 Poletimber -- 12,458 -- -- 12,458 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 46,668 -- -- 46,668 

Blue spruce 

 Sawtimber 1,580 10,535 -- -- 12,115 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 1,580 10,535 -- -- 12,115 

Cottonwood 

 Sawtimber -- -- 4,530 -- 4,530 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 4,530 -- 4,530 

Deciduous woodland oak 

 Sawtimber -- -- -- 47,457 47,457 

 Poletimber -- -- -- 28,349 28,349 

 Sapling/seedling -- -- -- 75,428 75,428 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 151,234 151,234 

Douglas-fir 

 Sawtimber -- 30,216 34,006 -- 64,221 

 Poletimber -- -- 3,545 -- 3,545 

 Sapling/seedling 4,741 -- -- -- 4,741 

 Nonstocked -- -- -- -- -- 

 Total 4,741 30,216 37,551 -- 72,507 

Engelmann spruce 

 Sawtimber 7,901 27,075 3,673 -- 38,650 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- 3,354 -- 3,354 

 Nonstocked -- -- -- -- -- 

 Total 7,901 27,075 7,027 -- 42,004 

Evergreen oak 

 Sawtimber -- -- -- 429,444 429,444 

 Poletimber -- -- -- 54,928 54,928 

 Sapling/seedling -- -- -- 4,229 4,229 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 488,601 488,601 

Juniper 

 Sawtimber -- -- -- 1,120,649 1,120,649 

 Poletimber -- -- -- 276,475 276,475 

 Sapling/seedling -- -- -- 8,838 8,838 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,405,962 1,405,962 

Maple woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Mesquite 

 Sawtimber -- -- -- 130,141 130,141 

 Poletimber -- -- -- 469,382 469,382 

 Sapling/seedling -- -- -- 41,819 41,819 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 641,343 641,343 

 

 (con.) 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 43

Table 7 (Con.) 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - -

Misc. western hardwoods 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- 24,488 24,488 

 Sapling/seedling -- -- -- 4,741 4,741 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 29,229 29,229 

Other western softwoods 

 Sawtimber -- -- -- 6,288 6,288 

 Poletimber -- -- -- 6,288 6,288 

 Sapling/seedling -- 6,321 4,716 -- 11,037 

 Nonstocked -- -- -- -- -- 

 Total -- 6,321 4,716 12,576 23,614 

Pinyon-juniper 

 Sawtimber -- -- -- 2,756,531 2,756,531 

 Poletimber -- -- -- 1,037,460 1,037,460 

 Sapling/seedling -- -- -- 123,904 123,904 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 3,917,895 3,917,895 

Ponderosa pine 

 Sawtimber 6,288 279,514 474,259 6,288 766,349 

 Poletimber -- -- 50,734 -- 50,734 

 Sapling/seedling -- 11,809 22,058 -- 33,867 

 Nonstocked -- -- -- -- -- 

 Total 6,288 291,323 547,050 6,288 850,950 

Spruce-fir 

 Sawtimber -- -- 7,027 -- 7,027 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 7,027 -- 7,027 

White fir 

 Sawtimber 4,716 7,803 -- -- 12,519 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 4,716 7,803 -- -- 12,519 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 6,075 18,250 -- 24,325 

 Total -- 6,075 18,250 -- 24,325 

Nonstocked woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- 279,819 279,819 

 Total -- -- -- 279,819 279,819 

All types 

 Sawtimber 20,486 389,354 523,495 4,496,799 5,430,133 

 Poletimber -- 12,458 54,279 1,897,370 1,964,107 

 Sapling/seedling 4,741 18,130 30,128 258,959 311,958 

 Nonstocked -- 6,075 18,250 279,819 304,144 

 Total 25,227 426,017 626,152 6,932,946 8,010,342 
44 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 8--Area of forest land by stand volume and owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Stand volume per acrea Forest public private Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - -

Less than 1,500 board feet 5,723,440 3,010,902 6,902,383 15,636,725 

1,500 to 4,999 board feet 1,017,785 58,585 450,814 1,527,185 

5,000 to 9,999 board feet 746,249 45,429 373,742 1,165,420 

10,000 board feet or more 735,202 79,037 283,403 1,097,643 

 Total 8,222,676 3,193,954 8,010,342 19,426,972 

 

 a

International -inch rule. 

Table 9--Area of forest land by forest type and stocking condition, Arizona, 1999 

 

 Stocking condition 

 Fully Medium to Poorly 

 Overstocked stocked fully stocked stocked Nonstocked 

Forest type timberland timberland timberland timberland timberland Woodland Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Aspen 19,538 69,315 47,156 11,083 -- -- 147,093 

Blue spruce -- 7,375 7,889 1,742 -- -- 17,006 

Cottonwood -- 6,223 4,530 2,973 -- -- 13,726 

Deciduous woodland oak -- -- -- -- -- 311,532 311,532 

Douglas-fir 26,827 80,208 97,514 35,059 -- -- 239,608 

Engelmann spruce 1,580 64,406 27,860 33,483 -- -- 127,329 

Evergreen oak -- -- -- -- -- 1,616,135 1,616,135 

Juniper -- -- -- -- -- 3,106,068 3,106,068 

Maple woodland -- -- -- -- -- 8,875 8,875 

Mesquite -- -- -- -- -- 1,426,544 1,426,544 

Misc. western hardwoods -- -- -- -- -- 126,657 126,657 

Other western softwoods 2,555 25,089 32,910 33,466 -- -- 94,019 

Pinyon-juniper -- -- -- -- -- 7,777,827 7,777,827 

Ponderosa pine 32,287 710,209 1,316,091 988,573 -- -- 3,047,159 

Spruce-fir -- 11,918 6,536 -- -- -- 18,454 

White fir 7,759 38,590 31,579 12,990 -- -- 90,919 

Nonstocked timberland -- -- -- -- 101,244 -- 101,244 

Nonstocked woodland -- -- -- -- -- 1,156,776 1,156,776 

 All types 90,546 1,013,333 1,572,066 1,119,369 101,244 15,530,414 19,426,972 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 45 Table 10--Area of forest land by forest type and basal area class, Arizona, 1999 Basal area class Forest type 0 1-25 26-50 51-75 76-100 101-150 151-200 201-250 251-300 301-350 351-400 Total - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Aspen -- 11,233 -- 33,490 27,933 12,405 30,601 14,080 17,350 -- -- 147,093 Blue spruce -- 3,148 -- 1,742 -- 10,535 1,580 -- -- -- -- 17,006 Cottonwood -- 2,973 -- 4,530 -- 6,223 -- -- -- -- -- 13,726 Deciduous woodland oak 24,337 20,614 40,671 36,663 45,980 70,135 58,524 12,764 -- -- 1,844 311,532 Douglas-fir 187 -- 4,741 27,889 27,462 62,728 55,836 25,834 16,961 17,141 828 239,608 Engelmann spruce 1,319 3,732 3,662 26,089 16,033 24,379 39,414 11,120 1,580 -- -- 127,329 Evergreen oak 17,011 219,268 361,643 300,939 196,842 320,671 143,273 51,844 1,589 3,053 -- 1,616,135 Juniper 54,216 744,812 802,498 605,163 355,835 370,178 120,242 47,035 6,089 -- -- 3,106,068 Maple woodland -- -- -- 8,875 -- -- -- -- -- -- -- 8,875 Mesquite 53,622 986,537 255,928 91,553 8,455 18,351 12,098 -- -- -- -- 1,426,544 Misc. western hardwoods -- 99,804 20,478 6,375 -- -- -- -- -- -- -- 126,657 Other western softwoods -- 4,716 23,654 11,417 15,307 24,134 12,237 -- -- 2,555 -- 94,019 Pinyon-juniper 28,508 1,051,029 1,455,658 1,463,321 1,205,535 1,543,923 718,845 260,002 51,007 -- -- 7,777,827 Ponderosa pine 5,211 68,256 265,882 452,654 674,617 918,873 511,345 117,057 31,793 -- 1,471 3,047,159 Spruce-fir -- -- -- -- 6,536 4,890 -- 7,027 -- -- -- 18,454 White fir -- -- -- -- 24,523 21,083 14,919 24,456 4,716 1,223 -- 90,919 Nonstocked timberland 23,973 77,272 -- -- -- -- -- -- -- -- -- 101,244 Nonstocked woodland 229,723 927,054 -- -- -- -- -- -- -- -- -- 1,156,776 All types 438,105 4,220,448 3,234,815 3,070,702 2,605,058 3,408,509 1,718,917 571,218 131,086 23,972 4,142 19,426,972 Table 11--Area of forest land by forest type and stand-age class, Arizona, 1999 Stand-age class Nonstocked/ All Forest type Unclassified 1-50 51-100 101-150 151-200 201-250 251-300 301-350 351-400 401-450 classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Aspen -- 35,143 71,442 40,508 -- -- -- -- -- -- 147,093 Blue spruce -- 3,148 13,858 -- -- -- -- -- -- -- 17,006 Cottonwood -- 2,973 4,530 6,223 -- -- -- -- -- -- 13,726 Deciduous woodland oak 12,057 106,205 94,160 99,109 -- -- -- -- -- -- 311,532 Douglas-fir -- 16,234 107,405 73,158 36,453 6,358 -- -- -- -- 239,608 Engelmann spruce -- 3,354 68,426 44,429 11,120 -- -- -- -- -- 127,329 Evergreen oak 111,833 102,930 234,946 691,750 295,997 122,234 52,541 3,904 -- -- 1,616,135 Juniper 64,266 220,858 1,348,127 964,765 383,099 36,252 76,558 10,572 -- 1,572 3,106,068 Maple woodland -- 8,875 -- -- -- -- -- -- -- -- 8,875 Mesquite 215,286 779,805 220,772 119,202 62,871 25,554 3,053 -- -- -- 1,426,544 Misc. western hardwoods 58,751 30,635 23,615 -- 13,656 -- -- -- -- -- 126,657 Other western softwoods -- 11,037 12,617 29,211 41,155 -- -- -- -- -- 94,019 Pinyon-juniper 166,025 637,092 2,012,573 2,770,508 1,466,012 455,160 197,688 53,757 11,829 7,182 7,777,827 Ponderosa pine -- 143,422 1,684,405 953,541 236,936 16,427 6,354 6,075 -- -- 3,047,159 Spruce-fir -- -- 4,890 6,536 7,027 -- -- -- -- -- 18,454 White fir -- -- 28,363 56,280 6,276 -- -- -- -- -- 90,919 Nonstocked timberland 101,244 -- -- -- -- -- -- -- -- -- 101,244 Nonstocked woodland 1,156,776 -- -- -- -- -- -- -- -- -- 1,156,776 All types 1,886,239 2,101,711 5,930,128 5,855,220 2,560,604 661,985 336,194 74,308 11,829 8,754 19,426,972 
46 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 13--Area of forest land by habitat type series and forest type, Arizona, 1999 Forest type Deciduous Misc. Other Blue woodland Douglas-fir Engelmann Evergreen Maple western western Pinyon- Ponderosa Nonstocked Nonstocked Habitat type series Aspen spruce Cottonwood oak spruce oak Juniper woodland Mesquite hardwoods softwoods juniper pine Spruce-fir White fir timberland woodland All types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - White fir 14,211 -- -- -- 58,163 -- -- -- -- -- 4,741 11,853 -- 124,983 -- 78,107 1,822 -- 293,879 Unclassified 8,649 -- -- 57,401 -- -- 258,009 1,736,040 -- 1,330,175 108,774 -- 4,008,512 54,159 -- -- 15,582 435,732 8,013,031 Subalpine fir 36,423 -- -- -- 31,198 54,816 -- -- -- -- -- -- -- -- 11,918 -- -- -- 134,355 Engelmann spruce 40,285 -- -- -- -- 67,532 -- -- -- -- -- 6,328 -- 30,408 -- 12,813 -- -- 157,365 Blue spruce 4,890 13,858 -- -- -- 1,319 -- -- -- -- -- -- -- 6,276 6,536 -- -- -- 32,880 Ponderosa pine 18,119 3,148 6,223 218,007 18,218 -- 160,613 186,631 -- -- 5,007 -- 343,406 2,632,002 -- -- 83,840 26,385 3,701,599 Douglas-fir 24,516 -- -- 11,312 132,030 3,662 23,929 18,283 8,875 -- 4,832 15,595 29,577 130,252 -- -- -- -- 402,863 Arizona cypress -- -- 2,973 -- -- -- 6,623 -- -- -- -- 38,518 5,772 -- -- -- -- -- 53,886 Apache pine -- -- -- -- -- -- 19,503 -- -- -- -- 4,433 -- -- -- -- -- -- 23,936 Chihuahua pine -- -- -- -- -- -- 12,862 -- -- -- -- 17,292 -- 31,441 -- -- -- -- 61,596 Fremont poplar -- -- 4,530 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 4,530 Thinleaf alder -- -- -- -- -- -- -- -- -- -- -- -- 4,959 -- -- -- -- -- 4,959 Arizona sycamore -- -- -- -- -- -- -- -- -- -- -- -- 6,225 -- -- -- -- 1,870 8,095 Juniper woodland -- -- -- -- -- -- 24,039 972,796 -- 66,183 3,303 -- 368,229 13,703 -- -- -- 332,783 1,781,036 Pinyon pine -- -- -- -- -- -- 144,620 112,523 -- -- -- -- 2,597,094 10,917 -- -- -- 208,999 3,074,153 Scarp -- -- -- 24,812 -- -- 50,440 28,326 -- 6,623 -- -- 200,341 -- -- -- -- 47,783 358,324 Madrean oak -- -- -- -- -- -- 915,497 51,469 -- 23,564 -- -- 213,714 13,020 -- -- -- 103,225 1,320,487 All types 147,093 17,006 13,726 311,532 239,608 127,329 1,616,135 3,106,068 8,875 1,426,544 126,657 94,019 7,777,827 3,047,159 18,454 90,919 101,244 1,156,776 19,426,972 Table 12--Area of forest land by land category, forest type group and percent stand density index, Arizona, 1999 Hardwood/softwood Percent of maximum stand density index (SDI) type < 10 10.0-24.9 25.0-34.9 35.0-49.9 50.0-59.9 60 + Total area - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Timberland Softwoods Pine 75,019 526,685 554,149 868,349 372,021 650,936 3,047,159 Mixed conifer 8,076 62,739 49,881 133,423 45,886 47,528 347,533 Spruce-fir 8,713 39,228 27,533 49,001 12,701 8,608 145,783 Other -- 28,370 11,417 15,307 10,892 28,034 94,019 Nonstocked 101,244 -- -- -- -- -- 101,244 Hardwoods 14,206 20,748 41,157 29,813 28,482 26,412 160,818 Woodland Softwoods 2,345,617 3,626,334 1,989,966 1,898,241 794,771 956,729 11,611,658 Hardwoods 1,583,247 1,070,839 407,472 308,940 197,010 351,248 3,918,756 Total forest land 4,136,123 5,374,942 3,081,576 3,303,073 1,461,762 2,069,496 19,426,972 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 47 Table 14--Number of live trees on forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera 101,176 55,465 34,264 24,058 17,690 11,945 8,532 6,053 3,933 2,823 1,621 1,136 1,294 991 2,320 273,302 Apache pine 486 486 39 79 117 39 40 -- 40 39 40 40 -- -- -- 1,447 Arizona cypress 10,380 4,656 1,420 1,448 820 436 578 96 87 131 -- -- -- -- -- 20,051 Arizona pinyon pinea 26,114 7,261 8,395 5,082 3,102 1,702 1,083 368 112 80 32 -- -- -- -- 53,332 Blue spruce 474 553 433 245 327 330 188 84 77 38 -- -- -- -- -- 2,749 Border pinyona 22,724 11,672 9,388 6,068 2,615 1,077 840 235 80 78 -- -- -- -- -- 54,778 California junipera 898 898 349 267 289 239 -- -- -- -- -- -- -- -- -- 2,941 Chihuahua pine 1,886 943 1,149 670 468 229 78 81 -- -- -- -- -- -- -- 5,504 Corkbark fir 5,968 2,823 1,440 830 635 360 283 282 85 -- 29 -- -- -- -- 12,734 Douglas-fir 61,667 31,498 16,842 11,157 8,470 4,954 3,258 2,358 1,595 844 527 406 506 119 803 145,004 Engelmann spruce 15,059 14,725 5,251 4,917 3,830 2,893 1,657 1,016 771 614 361 67 -- -- 62 51,224 Mexican pinyon pinea 2,232 1,430 1,092 588 178 60 39 38 39 -- -- -- -- -- -- 5,695 Oneseed junipera 47,815 26,204 28,901 25,199 24,193 22,582 17,023 16,645 11,268 9,637 7,465 4,365 3,274 1,963 4,095 250,628 Ponderosa pine 219,871 160,243 111,596 89,316 66,811 44,648 28,793 17,869 11,587 8,242 5,712 4,285 2,185 1,575 1,720 774,453 Redberry junipera 465 -- 392 521 191 583 397 334 226 -- 36 37 30 75 37 3,324 Rocky Mountain junipera 23,022 13,983 4,664 3,262 1,886 1,790 1,042 789 712 304 196 185 175 -- 310 52,320 Singleleaf pinyona 15,731 5,106 4,593 3,468 2,010 1,309 519 258 73 -- 41 -- -- -- -- 33,106 Southwestern white pine 5,458 969 2,623 2,175 1,334 636 807 379 44 104 97 67 44 37 44 14,818 Subalpine fir 2,817 -- 528 511 303 319 197 67 39 -- -- -- -- -- -- 4,780 Twoneedle pinyona 323,031 169,142 120,517 84,193 53,755 33,067 17,192 7,941 3,830 2,485 1,070 354 474 -- 60 817,111 Utah junipera 136,408 70,897 72,088 58,049 47,788 35,287 26,481 22,602 16,858 14,193 9,615 5,683 4,440 3,076 4,356 527,823 White fir 37,273 16,379 6,612 5,412 4,195 3,012 1,854 1,003 1,140 425 474 178 100 237 52 78,345 Softwood total 1,060,954 595,333 432,575 327,519 241,005 167,495 110,880 78,498 52,597 40,039 27,317 16,803 12,522 8,072 13,860 3,185,470 Arizona white oaka 94,847 54,281 48,050 36,615 25,265 14,877 9,098 5,219 2,832 2,010 1,081 559 347 -- 316 295,398 Aspen 62,592 13,534 6,359 6,054 5,525 4,663 2,552 1,978 400 213 38 -- -- -- -- 103,908 Bigtooth maplea 10,351 2,870 1,019 305 78 35 194 -- -- -- -- -- -- -- -- 14,852 Boxelder 614 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 614 Cottonwood -- 933 112 150 112 37 37 37 37 -- -- -- -- -- -- 1,458 Desert ironwooda 859 3,109 946 623 690 151 184 160 184 37 -- -- 37 57 -- 7,036 Emory oaka 49,232 22,289 22,363 19,687 12,444 6,525 4,257 1,946 1,559 451 308 106 64 33 -- 141,264 Gambel oaka 453,159 99,240 68,988 26,041 9,279 4,816 2,274 1,294 835 820 340 436 264 119 261 668,168 Mesquitea 59,918 18,783 14,552 10,009 6,310 3,278 1,723 998 491 115 -- -- -- -- -- 116,177 Mexican blue oaka -- 819 944 1,246 778 1,288 992 226 109 182 109 72 74 35 -- 6,876 New Mexico locusta 82,172 9,687 1,076 232 38 71 -- -- -- -- -- -- -- -- -- 93,277 Oak--evergreena 15,666 7,302 4,285 1,750 1,853 784 375 -- 280 -- -- -- -- -- -- 32,295 Rocky Mountain maplea -- -- 177 35 109 35 -- -- -- -- -- -- -- -- -- 357 Silverleaf oaka 52,549 21,412 8,752 5,865 3,846 1,918 764 651 203 200 155 -- 76 -- -- 96,392 Velvet mesquitea 17,339 5,541 7,438 4,821 2,881 1,347 813 522 368 316 74 36 39 73 -- 41,609 W. honey mesquitea 10,410 9,299 3,405 1,925 1,599 660 225 74 74 -- -- -- -- -- 74 27,744 Hardwood total 909,709 269,100 188,467 115,358 70,810 40,486 23,488 13,107 7,372 4,344 2,106 1,210 901 318 650 1,647,425 All species 1,970,663 864,433 621,041 442,876 311,815 207,981 134,368 91,605 59,969 44,383 29,423 18,013 13,423 8,390 14,510 4,832,895 aDiameter taken at root collar rather than at breast height.
48 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 15--Number of standing dead trees on forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera 1,868 1,412 1,097 744 723 657 379 608 275 186 383 233 159 78 476 9,277 Apache pine -- -- 40 40 -- -- 40 -- -- -- 39 -- -- -- -- 160 Arizona cypress -- -- 87 77 40 37 75 53 -- -- -- -- -- -- -- 370 Arizona pinyon pinea 899 -- 71 194 185 148 77 -- 39 -- -- -- -- -- -- 1,613 Blue spruce -- -- 133 44 -- -- -- -- -- -- 39 -- -- -- -- 217 Border pinyona -- -- 486 790 251 -- 258 -- -- -- -- -- -- -- -- 1,785 California junipera -- -- 60 -- 38 -- -- -- -- -- 33 -- -- -- -- 131 Chihuahua pine -- -- 38 105 -- -- -- -- -- -- -- -- -- -- -- 143 Corkbark fir -- -- 216 293 161 118 29 39 39 -- -- -- 42 -- -- 939 Douglas-fir 5,556 1,798 1,246 687 605 501 328 363 38 147 306 37 111 -- 168 11,890 Engelmann spruce 1,314 1,330 847 661 742 424 184 166 204 163 39 39 -- -- -- 6,113 Mexican pinyon pinea -- -- -- 39 39 -- -- -- -- -- -- -- -- -- -- 78 Oneseed junipera -- 397 827 840 1,799 1,534 1,698 1,154 857 857 371 232 231 97 163 11,058 Ponderosa pine 9,472 8,714 6,411 4,358 2,679 1,553 1,047 567 787 910 430 627 116 342 274 38,286 Redberry junipera -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Rocky Mountain junipera 467 938 79 197 152 73 38 151 72 72 72 -- -- 72 -- 2,382 Singleleaf pinyona -- -- -- 36 -- 80 -- 127 -- -- -- -- -- -- -- 244 Southwestern white pine 333 -- 176 191 181 76 82 -- 38 76 -- 75 -- -- -- 1,228 Subalpine fir -- 490 571 228 234 156 39 -- -- -- -- -- -- -- -- 1,719 Twoneedle pinyona 5,798 2,778 3,379 3,717 2,218 1,629 810 610 655 65 39 -- -- -- 60 21,758 Utah junipera 1,491 1,653 2,941 2,994 3,700 3,319 3,827 2,318 1,269 1,039 719 407 -- 184 276 26,137 White fir 3,444 1,844 1,085 503 538 373 244 186 79 76 -- -- -- 44 38 8,453 Softwood total 30,643 21,354 19,791 16,739 14,286 10,679 9,155 6,342 4,352 3,592 2,469 1,650 659 817 1,454 143,982 Arizona white oaka 2,263 4,101 3,097 1,538 1,024 736 725 491 159 383 37 72 109 37 41 14,814 Aspen 9,212 837 3,361 2,291 1,197 845 432 483 117 -- -- 29 -- -- -- 18,805 Bigtooth maplea 1,427 -- 38 -- -- -- -- -- -- -- -- -- -- -- -- 1,465 Boxelder -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood -- -- -- -- 150 -- -- -- -- -- -- -- -- -- -- 150 Desert ironwooda -- -- 47 47 77 -- -- -- -- -- -- -- -- 38 -- 209 Emory oaka -- 1,333 897 633 713 288 144 149 74 75 -- -- -- -- -- 4,307 Gambel oaka 61,999 15,007 8,673 2,192 978 669 341 191 270 76 114 76 37 -- -- 90,624 Mesquitea -- -- 492 368 -- 123 -- -- -- -- -- -- -- -- -- 982 Mexican blue oaka -- 916 37 37 -- 74 37 37 -- 72 -- 35 -- -- -- 1,244 New Mexico locusta 8,287 865 69 33 -- -- -- -- -- -- -- -- -- -- -- 9,255 Oak--evergreena -- 1,021 255 -- 136 -- 136 -- -- -- -- -- -- -- -- 1,549 Rocky Mountain maplea -- -- 40 -- -- -- -- -- -- -- -- -- -- -- -- 40 Silverleaf oaka 3,272 477 1,277 844 348 193 -- -- -- -- -- -- -- -- -- 6,411 Velvet mesquitea -- -- 232 77 141 -- 39 -- -- -- -- -- -- -- -- 490 W. honey mesquitea -- -- 37 113 -- -- -- -- -- -- -- -- -- -- -- 150 Hardwood total 86,460 24,556 18,553 8,173 4,763 2,928 1,855 1,351 620 606 151 213 147 76 41 150,493 All species 117,103 45,910 38,344 24,912 19,049 13,606 11,010 7,693 4,972 4,198 2,621 1,863 805 893 1,496 294,475 

aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 49 Table 16--Total oven-dry weight of biomass of all live trees on forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand tons - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera 59 204 294 477 700 775 893 897 821 814 605 554 698 630 2,726 11,147 Apache pine 2 10 2 6 16 8 15 -- 35 36 73 80 -- -- -- 284 Arizona cypress 52 100 61 111 96 85 168 33 40 96 -- -- -- -- -- 842 Arizona pinyon pinea 17 29 145 204 236 233 195 98 38 36 12 -- -- -- -- 1,242 Blue spruce 2 12 20 26 56 94 70 47 57 38 -- -- -- -- -- 422 Border pinyona 10 44 127 174 158 121 116 50 21 24 -- -- -- -- -- 844 California junipera 1 3 2 5 6 7 -- -- -- -- -- -- -- -- -- 23 Chihuahua pine 9 20 46 39 52 39 30 41 -- -- -- -- -- -- -- 277 Corkbark fir 30 61 60 69 107 96 118 184 55 -- 39 -- -- -- -- 819 Douglas-fir 339 772 835 1,124 1,478 1,352 1,343 1,328 1,206 808 632 618 861 235 2,839 15,768 Engelmann spruce 90 317 204 464 672 796 718 569 624 652 506 126 -- -- 152 5,889 Mexican pinyon pinea 1 3 18 19 10 7 5 7 13 -- -- -- -- -- -- 81 Oneseed junipera 24 90 201 402 755 1,119 1,358 1,985 1,854 2,027 2,124 1,417 1,213 888 3,025 18,481 Ponderosa pine 1,099 3,205 5,321 7,457 9,987 11,021 10,954 9,963 9,117 8,706 8,651 8,064 5,113 4,240 7,015 109,912 Redberry junipera (

b) -- 3 8 7 32 36 53 35 -- 7 17 13 41 29 281 

Rocky Mountain junipera 16 72 63 90 108 157 134 139 172 105 82 83 140 -- 241 1,604 

Singleleaf pinyona 7 20 76 144 152 165 87 66 25 -- 27 -- -- -- -- 769 

Southwestern white pine 27 21 124 167 194 145 281 191 23 90 114 92 90 82 120 1,759 Subalpine fir 15 -- 22 46 56 95 87 35 29 -- -- -- -- -- -- 386 Twoneedle pinyona 159 641 1,830 2,948 3,620 3,725 2,896 1,877 1,149 928 471 190 305 -- 72 20,812 

Utah junipera 80 240 527 1,001 1,586 2,001 2,241 2,837 2,980 3,202 2,824 1,892 1,908 1,468 2,967 27,754 

White fir 186 352 285 469 639 724 693 513 802 387 553 275 168 519 107 6,672  Softwood total 2,229 6,216 10,265 15,448 20,689 22,795 22,438 20,913 19,097 17,947 16,718 13,408 10,509 8,103 19,292 226,068 

Arizona white oaka 158 417 1,347 2,105 2,527 2,361 2,179 1,792 1,187 1,076 762 469 332 -- 542 17,254 

Aspen 125 129 281 660 1,180 1,608 1,252 1,392 355 204 43 -- -- -- -- 7,229 Bigtooth maplea 22 32 44 30 20 7 73 -- -- -- -- -- -- -- -- 228 

Boxelder 1 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1 Cottonwood -- 9 3 9 14 8 11 14 20 -- -- -- -- -- -- 87 Desert ironwooda 1 31 18 24 40 18 27 36 64 12 -- -- 24 45 -- 342 

Emory oaka 78 167 602 1,063 1,285 1,058 1,046 691 740 238 214 94 78 54 -- 7,408 

Gambel oaka 951 1,196 3,391 2,731 1,800 1,484 978 753 623 714 370 493 384 221 652 16,739 

Mesquitea 132 166 460 649 693 652 456 315 261 68 -- -- -- -- -- 3,853 

Mexican blue oaka -- 8 29 74 80 184 220 70 48 102 60 66 72 32 -- 1,043 

New Mexico locusta 153 128 70 26 7 19 -- -- -- -- -- -- -- -- -- 402 

Oak--evergreena 23 46 104 73 151 91 58 -- 107 -- -- -- -- -- -- 653 

Rocky Mountain maplea -- -- 7 3 17 7 -- -- -- -- -- -- -- -- -- 33 

Silverleaf oaka 89 212 297 399 448 394 222 250 91 146 111 -- 78 -- -- 2,737 

Velvet mesquitea 28 44 225 282 335 260 261 220 179 182 53 22 39 67 -- 2,196 

W. honey mesquitea 24 65 112 126 236 137 67 26 42 -- -- -- -- -- 178 1,013 

 Hardwood total 1,786 2,649 6,989 8,256 8,831 8,287 6,849 5,559 3,717 2,742 1,612 1,144 1,007 418 1,372 61,218 

 All species 4,014 8,866 17,254 23,704 29,520 31,083 29,287 26,472 22,814 20,689 18,331 14,552 11,516 8,521 20,664 287,286 

aDiameter taken at root collar rather than at breast height. bLess than 500 tons. 
50 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 17--Net volume of all live trees on forest land by forest type and stand-size class, 

 Arizona, 1999 

 

 Stand-size class 

 Sapling/ All 

Forest type Sawtimber Poletimber seedling Nonstocked classes 

- - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - 

Aspen 288,932 78,986 2,428 -- 370,347 

Blue spruce 36,676 -- 243 -- 36,919 

Cottonwood 15,345 317 -- -- 15,662 

Deciduous woodland oak 158,418 128,826 25,084 -- 312,327 

Douglas-fir 700,113 16,157 4,760 -- 721,029 

Engelmann spruce 387,532 8,045 397 -- 395,974 

Evergreen oak 917,936 53,772 5,245 -- 976,954 

Juniper 1,205,810 95,479 4,027 -- 1,305,317 

Maple woodland -- -- 8,534 -- 8,534 

Mesquite 98,745 70,195 7,361 -- 176,301 

Misc. western hardwoods 5,215 561 3,644 -- 9,419 

Other western softwoods 114,238 2,796 6,408 -- 123,441 

Pinyon-juniper 4,326,811 712,713 26,070 -- 5,065,594 

Ponderosa pine 5,526,265 98,567 26,677 -- 5,651,510 

Spruce-fir 67,378 -- -- -- 67,378 

White fir 270,087 -- -- -- 270,087 

Nonstocked timberland -- -- -- 10,620 10,620 

Nonstocked woodland -- -- -- 45,100 45,100 

 All types 14,119,501 1,266,414 120,878 55,719 15,562,512 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 51

Table 18--Net volume of all live trees on forest land by species and owner group, 

 Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

 - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Alligator juniper 514,208 12,118 351,030 877,357 

Apache pine 12,527 -- -- 12,527 

Arizona cypress 30,056 573 -- 30,629 

Arizona pinyon pine 92,216 -- 7,786 100,002 

Blue spruce 1,390 4,036 21,546 26,972 

Border pinyon 57,968 5,918 2,428 66,314 

California juniper -- 1,162 647 1,809 

Chihuahua pine 5,017 636 5,197 10,850 

Corkbark fir 22,172 -- 26,159 48,331 

Douglas-fir 533,913 11,485 211,629 757,026 

Engelmann spruce 162,535 49,239 158,643 370,417 

Mexican pinyon pine 4,582 1,895 -- 6,477 

Oneseed juniper 367,422 100,419 879,249 1,347,089 

Ponderosa pine 3,604,410 289,731 1,518,406 5,412,548 

Redberry juniper 16,292 2,562 4,341 23,195 

Rocky Mountain juniper 34,784 320 83,440 118,544 

Singleleaf pinyon 34,619 5,619 21,336 61,575 

Southwestern white pine 79,723 4,243 15,789 99,754 

Subalpine fir 10,084 13,518 -- 23,603 

Twoneedle pinyon 567,496 158,681 926,838 1,653,016 

Utah juniper 591,752 654,168 897,276 2,143,197 

White fir 253,688 38,459 48,170 340,317 

 Softwood total 6,996,854 1,354,783 5,179,910 13,531,547 

Arizona white oak 320,383 8,702 209,394 538,479 

Aspen 179,455 48,810 154,947 383,212 

Bigtooth maple 611 -- 7,552 8,164 

Boxelder -- -- -- -- 

Cottonwood 3,055 -- 1,775 4,830 

Desert ironwood 148 7,491 1,769 9,407 

Emory oak 161,756 5,317 94,144 261,216 

Gambel oak 301,753 10,901 186,233 498,888 

Mesquite 63 42,356 54,526 96,944 

Mexican blue oak 33,713 -- 490 34,203 

New Mexico locust 1,952 281 1,613 3,846 

Oak--evergreen 833 5,322 11,435 17,590 

Rocky Mountain maple 1,385 -- 133 1,517 

Silverleaf oak 66,659 5,874 8,465 80,997 

Velvet mesquite 26,972 24,527 12,005 63,504 

W. honey mesquite 25,979 1,962 226 28,167 

 Hardwood total 1,124,716 161,542 744,707 2,030,965 

 All species 8,121,570 1,516,325 5,924,617 15,562,512 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

 

 aDiameter taken at root collar rather than at breast height.
52 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 19--Net volume of all live trees on forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera 29,699 45,392 63,350 68,753 76,737 75,482 68,150 65,400 46,765 42,279 54,096 47,712 193,543 877,357 Apache pine 53 265 805 408 781 -- 1,785 1,806 2,404 4,221 -- -- -- 12,527 Arizona cypress 1,882 5,328 4,641 3,950 7,676 1,269 1,551 4,331 -- -- -- -- -- 30,629 Arizona pinyon pinea 12,533 17,422 19,714 19,330 16,087 7,952 3,115 2,889 960 -- -- -- -- 100,002 Blue spruce 968 1,568 3,495 6,295 4,676 3,197 4,071 2,703 -- -- -- -- -- 26,972 Border pinyona 11,059 14,964 13,239 9,884 9,521 4,056 1,698 1,894 -- -- -- -- -- 66,314 California junipera 181 477 527 623 -- -- -- -- -- -- -- -- -- 1,809 Chihuahua pine 1,309 1,654 2,429 1,860 1,477 2,121 -- -- -- -- -- -- -- 10,850 Corkbark fir 2,873 3,919 6,881 6,434 8,239 13,174 3,925 -- 2,886 -- -- -- -- 48,331 Douglas-fir 33,853 50,816 71,183 67,700 69,831 69,490 64,557 43,692 34,547 34,142 46,628 12,910 157,678 757,026 Engelmann spruce 9,302 26,946 42,737 52,502 49,486 39,856 44,791 47,528 36,724 9,450 -- -- 11,093 370,417 Mexican pinyon pinea 1,523 1,591 804 559 390 593 1,017 -- -- -- -- -- -- 6,477 Oneseed junipera 19,140 36,062 63,166 92,175 106,775 150,920 140,427 146,531 152,343 101,442 84,845 60,014 193,249 1,347,089 Ponderosa pine 188,649 375,499 532,097 584,501 573,258 515,078 469,407 444,477 459,415 424,649 266,588 219,637 359,294 5,412,548 Redberry junipera 289 761 630 2,945 3,140 4,379 2,946 -- 605 1,337 1,058 3,200 1,905 23,195 Rocky Mountain junipera 5,675 7,831 9,028 12,905 10,673 10,925 12,924 7,723 6,233 6,221 10,901 -- 17,506 118,544 Singleleaf pinyona 6,667 12,253 12,767 13,663 7,153 5,249 1,703 -- 2,119 -- -- -- -- 61,575 Southwestern white pine 4,711 8,984 11,164 8,086 16,049 11,828 1,317 5,020 7,396 6,036 5,792 5,528 7,842 99,754 Subalpine fir 1,068 2,712 3,309 6,527 5,538 2,290 2,159 -- -- -- -- -- -- 23,603 Twoneedle pinyona 158,977 250,623 303,102 308,002 236,383 149,320 91,155 73,689 36,861 15,149 24,028 -- 5,726 1,653,016 Utah junipera 49,493 91,461 137,256 167,777 184,670 225,842 233,344 241,892 212,786 142,345 140,013 107,275 209,045 2,143,197 White fir 11,740 22,474 32,633 39,040 39,282 29,805 47,594 22,911 32,595 13,850 10,456 31,377 6,560 340,317 Softwood total 551,645 979,002 1,334,956 1,473,919 1,427,820 1,322,826 1,197,635 1,112,487 1,034,639 801,121 644,405 487,652 1,163,441 13,531,547 Arizona white oaka 37,232 62,935 79,821 77,684 73,051 61,860 39,684 36,892 27,737 15,743 10,653 -- 15,185 538,479 Aspen 16,218 37,075 67,064 90,673 64,087 75,903 19,300 10,177 2,713 -- -- -- -- 383,212 Bigtooth maplea 1,816 1,376 1,013 312 3,648 -- -- -- -- -- -- -- -- 8,164 Boxelder -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood 163 565 857 471 668 878 1,230 -- -- -- -- -- -- 4,830 Desert ironwooda 464 702 1,010 607 903 1,248 1,975 412 -- -- 788 1,298 -- 9,407 Emory oaka 18,532 35,600 45,682 38,701 40,238 27,131 29,226 8,887 7,707 4,101 3,524 1,885 -- 261,216 Gambel oaka 105,117 91,561 64,646 52,828 36,056 28,272 23,161 26,013 12,795 16,511 14,317 9,139 18,472 498,888 Mesquitea 11,222 17,054 18,549 18,152 13,503 8,747 7,534 2,183 -- -- -- -- -- 96,944 Mexican blue oaka 793 2,146 2,540 5,822 7,255 2,464 1,634 3,540 2,006 2,178 2,794 1,030 -- 34,203 New Mexico locusta 2,236 800 240 570 -- -- -- -- -- -- -- -- -- 3,846 Oak--evergreena 2,691 2,091 4,348 2,782 1,822 -- 3,857 -- -- -- -- -- -- 17,590 Rocky Mountain maplea 286 125 777 330 -- -- -- -- -- -- -- -- -- 1,517 Silverleaf oaka 8,433 12,402 14,550 13,711 7,717 8,750 2,843 5,657 3,946 -- 2,988 -- -- 80,997 Velvet mesquitea 5,719 7,651 9,634 7,851 8,270 7,103 5,570 5,925 1,713 670 1,384 2,012 -- 63,504 W. honey mesquitea 2,903 3,536 7,003 4,077 2,091 831 1,407 -- -- -- -- -- 6,319 28,167 Hardwood total 213,826 275,618 317,734 314,570 259,311 223,188 137,422 99,687 58,617 39,204 36,447 15,364 39,976 2,030,965 All species 765,471 1,254,620 1,652,690 1,788,489 1,687,131 1,546,014 1,335,057 1,212,175 1,093,256 840,324 680,853 503,016 1,203,417 15,562,512 

aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 53 Table 20--Net volume of all live trees on forest land by species and forest type, Arizona, 1999 Forest type Deciduous Misc. Other Blue woodland Engelmann Evergreen Maple western western Pinyon- Ponderosa White Nonstocked Nonstocked All Species Aspen spruce Cottonwood oak Douglas-fir spruce oak Juniper woodland Mesquite hardwoods softwoods juniper pine Spruce-fir fir timberland woodland types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera -- -- 96 15,746 5,384 -- 125,762 225,894 -- -- 41 379 367,146 134,325 -- -- 231 2,354 877,357 Apache pine -- -- -- -- 7,564 -- 3,178 -- -- -- -- 1,785 -- -- -- -- -- -- 12,527 Arizona cypress -- -- -- -- -- -- 5,371 -- -- -- -- 24,229 206 822 -- -- -- -- 30,629 Arizona pinyon pinea -- -- -- -- -- -- 10,039 -- -- -- -- 3,473 85,261 -- -- -- -- 1,228 100,002 Blue spruce 69 22,867 -- -- -- -- -- -- -- -- -- -- -- -- 4,036 -- -- -- 26,972 Border pinyona -- -- -- -- 1,567 -- 12,959 -- -- -- -- 99 50,820 75 -- -- -- 794 66,314 California junipera -- -- -- -- -- -- -- 1,678 -- -- -- -- 131 -- -- -- -- -- 1,809 Chihuahua pine -- -- -- 66 -- -- 4,947 347 -- -- -- 3,313 -- 2,176 -- -- -- -- 10,850 Corkbark fir 3,198 -- -- -- 10,616 8,624 -- -- -- -- -- 4,316 -- 778 20,800 -- -- -- 48,331 Douglas-fir 27,727 2,189 -- 12,906 424,406 52,446 5,338 4,744 7,519 -- 465 10,108 16,533 147,631 2,228 42,787 -- -- 757,026 Engelmann spruce 18,439 -- -- -- 20,812 258,939 -- -- -- -- -- 1,151 -- 40,607 20,924 9,545 -- -- 370,417 Mexican pinyon pinea -- -- -- -- -- -- 2,040 -- -- -- -- 506 3,149 -- -- -- -- 782 6,477 Oneseed junipera -- -- -- 38 933 -- 3,868 388,794 -- 1,566 -- -- 941,424 2,429 -- -- 130 7,907 1,347,089 Ponderosa pine 58,969 3,660 4,763 110,866 92,346 28,368 73,186 69,488 95 -- 103 23,294 147,529 4,770,055 -- 21,018 8,505 304 5,412,548 Redberry junipera -- -- 195 -- -- -- 1,064 16,192 -- 849 149 -- 3,011 -- -- -- -- 1,735 23,195 Rocky Mountain junipera 341 -- -- 4,321 3,214 -- 2,723 5,435 -- -- -- -- 79,874 22,345 -- -- 291 -- 118,544 Singleleaf pinyona -- -- -- -- -- -- 4,963 -- -- 42 -- 2,012 50,049 867 -- -- -- 3,641 61,575 Southwestern white pine 4,924 1,078 -- 1,289 16,852 1,482 557 -- -- -- -- 38,383 -- 29,354 131 5,702 -- -- 99,754 Subalpine fir 842 -- -- -- -- 7,597 -- -- -- -- -- -- -- 2,224 12,939 -- -- -- 23,603 Twoneedle pinyona -- -- -- 1,884 3,419 -- 23,315 -- -- -- -- 1,599 1,592,772 26,992 -- -- 839 2,195 1,653,016 Utah junipera -- -- 883 1,110 31 -- 9,405 530,108 -- -- -- -- 1,580,385 15,023 -- -- -- 6,252 2,143,197 White fir 19,763 821 -- -- 70,261 1,610 -- -- -- -- 793 270 -- 80,918 1,395 164,487 -- -- 340,317 Softwood total 134,273 30,615 5,937 148,226 657,404 359,066 288,717 1,242,680 7,614 2,458 1,551 114,918 4,918,289 5,276,623 62,452 243,539 9,996 27,192 13,531,547 Arizona white oaka -- -- 2,817 1,627 419 -- 335,069 28,699 -- 394 1,033 391 100,201 65,894 -- -- -- 1,937 538,479 Aspen 234,319 6,304 -- 292 29,171 36,908 -- -- -- -- 512 6,142 -- 44,905 4,926 19,734 -- -- 383,212 Bigtooth maplea -- -- -- 3,896 636 -- -- 312 300 -- -- -- 578 373 -- 2,069 -- -- 8,164 Boxelder -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood -- -- 4,559 -- -- -- 271 -- -- -- -- -- -- -- -- -- -- -- 4,830 Desert ironwooda -- -- -- -- -- -- -- -- -- 2,590 5,923 -- -- -- -- -- -- 895 9,407 Emory oaka -- -- 1,677 1,853 1,382 -- 220,978 7,357 -- -- -- 270 15,995 7,163 -- -- -- 4,540 261,216 Gambel oaka 218 -- 672 154,875 30,095 -- 9,417 18,449 621 -- 401 367 25,078 253,733 -- 4,338 624 -- 498,888 Mesquitea -- -- -- -- -- -- -- 1,552 -- 95,170 -- -- 63 -- -- -- -- 160 96,944 Mexican blue oaka -- -- -- -- -- -- 29,749 2,157 -- 1,146 -- -- 47 -- -- -- -- 1,104 34,203 New Mexico locusta 1,537 -- -- 281 424 -- 208 128 -- -- -- -- -- 861 -- 408 -- -- 3,846 Oak--evergreena -- -- -- 1,125 -- -- 13,378 159 -- -- -- 674 2,185 70 -- -- -- -- 17,590 Rocky Mountain maplea -- -- -- 153 1,364 -- -- -- -- -- -- -- -- -- -- -- -- -- 1,517 Silverleaf oaka -- -- -- -- 135 -- 74,570 -- -- -- -- 679 2,956 1,888 -- -- -- 768 80,997 Velvet mesquitea -- -- -- -- -- -- 4,165 672 -- 51,697 -- -- 129 -- -- -- -- 6,841 63,504 W. honey mesquitea -- -- -- -- -- -- 431 3,153 -- 22,846 -- -- 73 -- -- -- -- 1,664 28,167 Hardwood total 236,074 6,304 9,725 164,102 63,626 36,908 688,237 62,637 920 173,843 7,868 8,523 147,305 374,886 4,926 26,549 624 17,908 2,030,965 All species 370,347 36,919 15,662 312,327 721,029 395,974 976,954 1,305,317 8,534 176,301 9,419 123,441 5,065,594 5,651,510 67,378 270,087 10,620 45,100 15,562,512 aDiameter taken at root collar rather than at breast height.
54 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 21--Net annual growth of all live trees on forest land by species and owner 

 group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Alligator juniper 2,206 101 2,568 4,874 

Apache pine 7 -- -- 7 

Arizona cypress 517 4 -- 521 

Arizona pinyon pine 1,593 -- -54 1,539 

Blue spruce 59 -677 682 64 

Border pinyon 581 145 52 777 

California juniper -- 14 14 27 

Chihuahua pine 106 20 135 261 

Corkbark fir 719 -- 256 975 

Douglas-fir 5,654 274 5,839 11,768 

Engelmann spruce 1,110 443 1,669 3,222 

Mexican pinyon pine 92 17 -- 109 

Oneseed juniper 2,778 607 5,315 8,700 

Ponderosa pine 74,465 4,280 32,987 111,732 

Redberry juniper 127 15 42 185 

Rocky Mountain juniper 239 6 616 860 

Singleleaf pinyon 572 91 134 796 

Southwestern white pine 1,945 35 495 2,475 

Subalpine fir 201 -1,027 -- -826 

Twoneedle pinyon 6,108 2,269 9,524 17,900 

Utah juniper 4,228 5,451 5,782 15,461 

White fir 3,482 -647 1,351 4,186 

 Softwood total 106,788 11,421 67,406 185,614 

Arizona white oak 2,507 78 2,098 4,682 

Aspen 1,315 -1,724 1,223 814 

Bigtooth maple 7 -- 323 330 

Boxelder -- -- -- -- 

Cottonwood 101 -- 124 226 

Desert ironwood -14 4 34 23 

Emory oak 1,573 47 1,016 2,636 

Gambel oak 5,338 334 3,058 8,730 

Mesquite (b ) 287 421 708 

Mexican blue oak 231 -- 6 236 

New Mexico locust 61 141 9 211 

Oak--evergreen 7 47 70 125 

Rocky Mountain maple 14 -- 2 17 

Silverleaf oak 582 54 78 714 

Velvet mesquite 361 173 153 687 

W. honey mesquite 384 75 2 461 

 Hardwood total 12,467 -485 8,618 20,599 

 All species 119,255 10,936 76,023 206,214 

 aDiameter taken at root collar rather than at breast height.

 bLess than 500 cubic feet. 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 55 Table 22--Net annual growth of all live trees on forest land by species and diameter class, Arizona, 1998 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera 1,288 618 732 625 636 363 487 330 52 154 200 161 -772 4,874 Apache pine -13 12 18 9 -163 -- 19 22 22 81 -- -- -- 7 Arizona cypress 173 123 41 58 87 8 12 19 -- -- -- -- -- 521 Arizona pinyon pinea 791 291 148 75 137 59 14 21 2 -- -- -- -- 1,539 Blue spruce 54 34 169 228 92 61 59 67 -700 -- -- -- -- 64 Border pinyona 445 64 83 124 9 28 17 8 -- -- -- -- -- 777 California junipera 4 7 9 7 -- -- -- -- -- -- -- -- -- 27 Chihuahua pine 77 37 42 42 24 39 -- -- -- -- -- -- -- 261 Corkbark fir 445 116 36 104 -54 240 25 -- 62 -- -- -- -- 975 Douglas-fir 3,012 1,914 2,611 1,541 1,433 837 1,373 770 -1,496 -274 447 180 -579 11,768 Engelmann spruce 875 841 457 692 877 -16 308 -570 526 -833 -- -- 65 3,222 Mexican pinyon pinea 83 24 -17 6 4 5 3 -- -- -- -- -- -- 109 Oneseed junipera 1,048 554 738 910 863 921 888 735 735 363 277 169 500 8,700 Ponderosa pine 15,879 13,504 16,679 15,160 12,687 9,236 7,523 5,786 5,464 4,450 1,493 1,817 2,053 111,732 Redberry junipera 7 11 9 29 35 40 26 -- 3 5 5 11 3 185 Rocky Mountain junipera 207 115 107 109 93 71 45 25 17 12 20 -- 40 860 Singleleaf pinyona 337 214 175 146 76 -163 5 -- 7 -- -- -- -- 796 Southwestern white pine 609 361 371 179 393 164 12 40 57 127 47 37 77 2,475 Subalpine fir -75 -58 -77 -544 158 -243 14 -- -- -- -- -- -- -826 Twoneedle pinyona 7,615 2,971 2,817 2,348 1,386 196 -13 324 156 40 51 -- 7 17,900 Utah junipera 2,792 1,352 1,539 1,526 1,448 1,557 1,489 1,171 850 471 428 294 543 15,461 White fir 818 705 846 752 100 88 620 128 601 136 121 274 -1,005 4,186 Softwood total 36,470 23,809 27,534 24,126 20,323 13,492 12,927 8,876 6,359 4,733 3,090 2,943 932 185,614 Arizona white oaka 1,815 748 647 569 448 280 153 -28 96 -117 43 -- 29 4,682 Aspen 463 -301 166 125 288 274 288 -576 87 -- -- -- -- 814 Bigtooth maplea 248 20 17 4 41 -- -- -- -- -- -- -- -- 330 Boxelder -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood 55 48 36 10 12 27 38 -- -- -- -- -- -- 226 Desert ironwooda 27 -5 -28 4 6 5 7 1 -- -- 2 3 -- 23 Emory oaka 909 369 413 342 261 137 104 30 28 9 15 19 -- 2,636 Gambel oaka 5,947 1,036 553 325 244 177 101 108 43 49 82 22 44 8,730 Mesquitea 327 107 142 18 59 30 20 5 -- -- -- -- -- 708 Mexican blue oaka 13 30 31 49 53 17 5 12 7 6 8 4 -- 236 New Mexico locusta 202 6 1 3 -- -- -- -- -- -- -- -- -- 211 Oak--evergreena 97 9 -20 16 9 -- 14 -- -- -- -- -- -- 125 Rocky Mountain maplea 4 3 7 3 -- -- -- -- -- -- -- -- -- 17 Silverleaf oaka 265 81 131 99 53 43 12 17 10 -- 4 -- -- 714 Velvet mesquitea 285 111 128 78 -9 31 21 24 6 2 4 5 -- 687 W. honey mesquitea 264 58 74 31 13 3 6 -- -- -- -- -- 10 461 Hardwood total 10,922 2,320 2,300 1,675 1,477 1,022 770 -407 278 -51 158 53 83 20,599 All species 47,392 26,129 29,834 25,801 21,800 14,513 13,697 8,469 6,637 4,682 3,249 2,996 1,016 206,214 aDiameter taken at root collar rather than at breast height.
56 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 23--Annual mortality of all trees on forest land by species and owner group, 

 Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Alligator juniper 1,656 -- 146 1,802 

Apache pine 196 -- -- 196 

Arizona cypress 42 -- -- 42 

Arizona pinyon pine 125 -- 144 269 

Blue spruce -- 700 39 739 

Border pinyon 418 -- -- 418 

California juniper -- -- -- -- 

Chihuahua pine 11 8 -- 19 

Corkbark fir 180 -- 367 547 

Douglas-fir 6,649 40 202 6,891 

Engelmann spruce 2,836 658 1,829 5,322 

Mexican pinyon pine 27 -- -- 27 

Oneseed juniper 18 -- 131 150 

Ponderosa pine 7,895 902 2,704 11,501 

Redberry juniper -- -- -- -- 

Rocky Mountain juniper 4 -- -- 4 

Singleleaf pinyon 13 -- 193 206 

Southwestern white pine 10 -- 161 171 

Subalpine fir 291 1,356 -- 1,647 

Twoneedle pinyon 829 81 1,784 2,694 

Utah juniper 191 -- -- 191 

White fir 2,486 1,693 87 4,267 

 Softwood total 23,877 5,438 7,787 37,102 

Arizona white oak 588 -- 289 877 

Aspen 2,424 2,420 2,333 7,176 

Bigtooth maple -- -- -- -- 

Boxelder -- -- -- -- 

Cottonwood -- -- -- -- 

Desert ironwood 16 35 -- 50 

Emory oak 76 5 24 105 

Gambel oak 701 -- 132 833 

Mesquite -- -- 141 141 

Mexican blue oak -- -- -- -- 

New Mexico locust 16 -- -- 16 

Oak--evergreen -- 17 51 68 

Rocky Mountain maple -- -- -- -- 

Silverleaf oak 139 -- -- 139 

Velvet mesquite 8 63 -- 71 

W. honey mesquite -- -- -- -- 

 Hardwood total 3,967 2,539 2,970 9,476 

 All species 27,845 7,977 10,757 46,579 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

 

a

Diameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 57 Table 24--Annual mortality of all trees on forest land by species and diameter class, Arizona, 1998 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator junipera 49 20 18 46 50 216 -- -- 159 -- -- -- 1,244 1,802 Apache pine 16 -- -- -- 180 -- -- -- -- -- -- -- -- 196 Arizona cypress 9 -- 33 -- -- -- -- -- -- -- -- -- -- 42 Arizona pinyon pinea 7 -- 132 131 -- -- -- -- -- -- -- -- -- 269 Blue spruce 16 23 -- -- -- -- -- -- 700 -- -- -- -- 739 Border pinyona 80 165 94 -- 78 -- -- -- -- -- -- -- -- 418 California junipera -- -- -- -- -- -- -- -- -- -- -- -- -- -- Chihuahua pine -- 19 -- -- -- -- -- -- -- -- -- -- -- 19 Corkbark fir 14 86 173 115 159 -- -- -- -- -- -- -- -- 547 Douglas-fir 210 254 159 578 531 626 -- -- 2,073 818 -- -- 1,642 6,891 Engelmann spruce 133 312 879 633 223 687 371 1,163 -- 921 -- -- -- 5,322 Mexican pinyon pinea -- -- 27 -- -- -- -- -- -- -- -- -- -- 27 Oneseed junipera -- -- 18 -- -- 131 -- -- -- -- -- -- -- 150 Ponderosa pine 1,068 1,760 1,167 1,350 1,056 1,333 595 1,137 870 -- 1,166 -- -- 11,501 Redberry junipera -- -- -- -- -- -- -- -- -- -- -- -- -- -- Rocky Mountain junipera 4 -- -- -- -- -- -- -- -- -- -- -- -- 4 Singleleaf pinyona 13 -- -- -- -- 193 -- -- -- -- -- -- -- 206 Southwestern white pine 21 44 10 96 -- -- -- -- -- -- -- -- -- 171 Subalpine fir 175 138 185 848 -- 301 -- -- -- -- -- -- -- 1,647 Twoneedle pinyona 179 381 521 336 210 592 474 -- -- -- -- -- -- 2,694 Utah junipera 12 19 24 73 62 -- -- -- -- -- -- -- -- 191 White fir 148 210 332 490 703 609 455 276 -- -- -- -- 1,043 4,267 Softwood total 2,152 3,430 3,772 4,698 3,253 4,689 1,895 2,577 3,802 1,738 1,166 -- 3,929 37,102 Arizona white oaka 138 52 111 46 65 71 30 183 -- 181 -- -- -- 877 Aspen 513 1,384 1,312 1,540 749 854 84 740 -- -- -- -- -- 7,176 Bigtooth maplea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Boxelder -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood -- -- -- -- -- -- -- -- -- -- -- -- -- -- Desert ironwooda 5 11 35 -- -- -- -- -- -- -- -- -- -- 50 Emory oaka 14 18 49 -- 24 -- -- -- -- -- -- -- -- 105 Gambel oaka 325 164 192 152 -- -- -- -- -- -- -- -- -- 833 Mesquitea -- 45 -- 95 -- -- -- -- -- -- -- -- -- 141 Mexican blue oaka -- -- -- -- -- -- -- -- -- -- -- -- -- -- New Mexico locusta 16 -- -- -- -- -- -- -- -- -- -- -- -- 16 Oak--evergreena -- 17 51 -- -- -- -- -- -- -- -- -- -- 68 Silverleaf oaka 67 72 -- -- -- -- -- -- -- -- -- -- -- 139 Velvet mesquitea 8 -- -- -- 63 -- -- -- -- -- -- -- -- 71 W. honey mesquitea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Hardwood total 1,086 1,763 1,750 1,833 901 925 114 923 -- 181 -- -- -- 9,476 All species 3,238 5,194 5,522 6,531 4,154 5,614 2,009 3,500 3,802 1,919 1,166 -- 3,929 46,579 aDiameter taken at root collar rather than at breast height.
58 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 25--Annual mortality of all trees on forest land by species and cause of death, Arizona, 1998 

 

 Cause of death 

Species Insects Disease Fire Animal Weather Suppression Unknown Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Alligator juniper 23 343 1,436 -- -- -- -- 1,802 

Apache pine -- -- 196 -- -- -- -- 196 

Arizona cypress -- -- 42 -- -- -- -- 42 

Arizona pinyon pine -- 144 59 -- -- -- 67 269 

Blue spruce -- 700 -- -- -- 39 -- 739 

Border pinyon 9 -- 356 -- 52 -- -- 418 

California juniper -- -- -- -- -- -- -- -- 

Chihuahua pine -- 11 -- -- 8 -- -- 19 

Corkbark fir 285 183 -- 79 -- -- -- 547 

Douglas-fir 3,315 2,843 435 10 263 25 -- 6,891 

Engelmann spruce 200 4,842 58 22 183 16 -- 5,322 

Mexican pinyon pine -- 27 -- -- -- -- -- 27 

Oneseed juniper -- -- 150 -- -- -- -- 150 

Ponderosa pine 3,156 2,453 2,827 -- 2,509 324 232 11,501 

Redberry juniper -- -- -- -- -- -- -- -- 

Rocky Mountain juniper -- -- -- -- -- -- 4 4 

Singleleaf pinyon 193 13 -- -- -- -- -- 206 

Southwestern white pine -- 10 96 64 -- -- -- 171 

Subalpine fir 147 1,274 226 -- -- -- -- 1,647 

Twoneedle pinyon 343 1,256 131 -- 645 -- 319 2,694 

Utah juniper -- 39 118 -- 35 -- -- 191 

White fir 40 3,406 773 31 16 -- -- 4,267 

 Softwood total 7,712 17,544 6,903 206 3,711 404 622 37,102 

Arizona white oak -- 633 148 -- -- 38 58 877 

Aspen 63 6,492 55 -- 384 101 81 7,176 

Bigtooth maple -- -- -- -- -- -- -- -- 

Boxelder -- -- -- -- -- -- -- -- 

Cottonwood -- -- -- -- -- -- -- -- 

Desert ironwood -- 35 16 -- -- -- -- 50 

Emory oak -- 32 11 -- 39 24 -- 105 

Gambel oak -- 40 335 -- 244 79 136 833 

Mesquite -- 141 -- -- -- -- -- 141 

Mexican blue oak -- -- -- -- -- -- -- -- 

New Mexico locust -- -- 16 -- -- -- -- 16 

Oak--evergreen -- -- -- -- -- -- 68 68 

Rocky Mountain maple -- -- -- -- -- -- -- -- 

Silverleaf oak 13 -- 114 -- -- -- 12 139 

Velvet mesquite -- 4 4 -- -- -- 63 71 

W. honey mesquite -- -- -- -- -- -- -- -- 

 Hardwood total 77 7,375 698 -- 668 242 418 9,476 

 All species 7,789 24,919 7,601 206 4,379 646 1,039 46,579 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

Diameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 59 Table 26--Average percent crown canopy cover by life form, average percent bare ground, total number and most common understory species recorded by forest type, and number of locations, Arizona, 1998 Average Average Average Average Total number of different Most common understory Number of Forest type shrub cover forb cover grass cover bare ground species recorded species recordeda locationsb - - - - - - - - - - - - - - - - - - - Percent - - - - - - - - - - - - - - - - - - - - Aspen 4 10 6 2 27 Sedge 23.37 Blue spruce 1 2 12 3 4 Arizona fescue 2.75 Cottonwood 2 3 2 2 4 Skunkbush sumac 2.20 Deciduous woodland oak 6 3 8 5 30 Mountain muhly 44.44 Douglas-fir 3 3 3 2 20 Screwleaf muhly 37.62 Engelmann spruce 3 7 7 3 25 Common juniper 20.00 Spruce/fir 2 4 2 0 1 Clubmoss 3.00 Evergreen oak 14 2 11 4 117 Pointleaf manzanita 236.62 Juniper 11 4 16 17 135 Blue grama 386.45 Maple 10 9 5 4 7 Fendler meadowrue 0.71 Mesquite 16 15 24 20 106 Sideoats grama 140.25 Misc. western hardwoods 24 9 5 24 27 Creosotebush 13.53 Misc. western softwoods 19 2 3 3 14 Pointleaf manzanita 14.71 Pinyon-juniper 14 3 9 17 170 Blue grama 1089.12 Ponderosa pine 2 3 7 3 98 Mountain muhly 477.61 White fir 3 3 2 2 9 Common juniper 14.45 Nonstocked 182.86 Total 2689.70 aTo be recorded, species had to have 5% or greater cover on a condition. bFractions due to mapping. 
60 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 27--Area, volume, growth, and mortality of live trees on forest 

 land by county, Arizona 

 

County 

 Area Volume Growth Mortality 

- -Acres - - - - - - - - Thousand cubic feet - - - - - - - - 

Apache 2,869,127 3,323,761 55,523 7,881 

Cochise 675,714 269,151 815 3,023 

Coconino 4,662,081 5,172,953 67,791 22,145 

Gila 1,922,409 1,484,189 18,132 2,384 

Graham 897,201 645,335 9,631 802 

Greenlee 684,188 682,028 7,991 4,678 

La Paz 5,789 89 1 -- 

Maricopa 163,311 29,498 -842 1,187 

Mohave 1,520,330 617,824 6,477 68 

Navajo 2,188,618 1,871,431 24,631 3,362 

Pima 1,257,257 276,857 2,727 259 

Pinal 213,360 42,862 425 66 

Santa Cruz 420,780 143,556 1,537 35 

Yavapai 1,925,870 1,000,851 11,367 688 

Yuma 20,936 2,127 8 -- 

 Total 19,426,972 15,562,512 206,214 46,579 

(1999) (1999) (1998) (1998)
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 61

Nonreserved Forest Land

Table 28--Area of nonreserved forest land by forest type, stand-size class, and productivity 

 class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - 

Aspen 

 Sawtimber -- 46,408 14,202 -- 60,610 

 Poletimber -- 17,348 7,845 -- 25,193 

 Sapling/seedling -- -- 17,510 -- 17,510 

 Nonstocked -- -- -- -- -- 

 Total -- 63,756 39,557 -- 103,313 

Blue spruce 

 Sawtimber 1,580 12,277 -- -- 13,858 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- 3,148 -- -- 3,148 

 Nonstocked -- -- -- -- -- 

 Total 1,580 15,425 -- -- 17,006 

Cottonwood 

 Sawtimber -- -- 10,753 -- 10,753 

 Poletimber -- -- 2,973 -- 2,973 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 13,726 -- 13,726 

Deciduous woodland oak 

 Sawtimber -- -- -- 100,916 100,916 

 Poletimber -- -- -- 85,367 85,367 

 Sapling/seedling -- -- -- 96,560 96,560 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 282,842 282,842 

Douglas-fir 

 Sawtimber -- 86,537 98,028 -- 184,566 

 Poletimber -- -- 13,290 -- 13,290 

 Sapling/seedling 4,741 -- 4,890 -- 9,631 

 Nonstocked -- -- -- -- -- 

 Total 4,741 86,537 116,208 -- 207,487 

Engelmann spruce 

 Sawtimber 9,532 70,303 17,545 -- 97,380 

 Poletimber -- -- 6,276 -- 6,276 

 Sapling/seedling -- -- 3,354 -- 3,354 

 Nonstocked -- -- -- -- -- 

 Total 9,532 70,303 27,175 -- 107,010 

Evergreen oak 

 Sawtimber -- -- -- 1,183,259 1,183,259 

 Poletimber -- -- -- 179,802 179,802 

 Sapling/seedling -- -- -- 41,709 41,709 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,404,771 1,404,771 

Juniper 

 Sawtimber -- -- -- 2,444,611 2,444,611 

 Poletimber -- -- -- 499,098 499,098 

 Sapling/seedling -- -- -- 49,270 49,270 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 2,992,979 2,992,979 

Mesquite 

 Sawtimber -- -- -- 406,628 406,628 

 Poletimber -- -- -- 801,210 801,210 

 Sapling/seedling -- -- -- 130,412 130,412 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 1,338,250 1,338,250 

 

 (con.) 
62 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 28 (Con.) 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

- - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - 

Misc. western hardwoods 

 Sawtimber -- -- -- 29,506 29,506 

 Poletimber -- -- -- 58,751 58,751 

 Sapling/seedling -- -- -- 24,177 24,177 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 112,434 112,434 

Other western softwoods 

 Sawtimber -- 7,289 10,892 25,364 43,545 

 Poletimber -- -- -- 6,288 6,288 

 Sapling/seedling -- 6,321 4,716 -- 11,037 

 Nonstocked -- -- -- -- -- 

 Total -- 13,611 15,608 31,652 60,870 

Pinyon-juniper 

 Sawtimber -- -- -- 5,062,058 5,062,058 

 Poletimber -- -- -- 1,667,221 1,667,221 

 Sapling/seedling -- -- -- 253,411 253,411 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- 6,982,690 6,982,690 

Ponderosa pine 

 Sawtimber 6,288 605,400 2,031,979 6,288 2,649,956 

 Poletimber -- -- 137,414 -- 137,414 

 Sapling/seedling -- 18,412 71,364 -- 89,776 

 Nonstocked -- -- -- -- -- 

 Total 6,288 623,813 2,240,756 6,288 2,877,145 

Spruce-fir 

 Sawtimber -- 4,890 7,027 -- 11,918 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 4,890 7,027 -- 11,918 

White fir 

 Sawtimber 4,716 48,293 20,209 -- 73,219 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 4,716 48,293 20,209 -- 73,219 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 18,934 74,333 -- 93,268 

 Total -- 18,934 74,333 -- 93,268 

Nonstocked woodland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- 929,764 929,764 

 Total -- -- -- 929,764 929,764 

All types 

 Sawtimber 22,117 881,399 2,210,636 9,258,631 12,372,783 

 Poletimber -- 17,348 167,797 3,297,736 3,482,882 

 Sapling/seedling 4,741 27,881 101,834 595,539 729,995 

 Nonstocked -- 18,934 74,333 929,764 1,023,032 

 Total 26,857 945,563 2,554,601 14,081,670 17,608,691 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 63

Table 29--Area of nonreserved forest land by stand volume and owner group, 

 Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Stand volume per acrea Forest public private Total 

- - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - 

Less than 1,500 board feet 4,974,005 2,394,889 6,835,692 14,204,585 

1,500 to 4,999 board feet 893,735 20,672 450,814 1,365,222 

5,000 to 9,999 board feet 697,792 17,377 373,742 1,088,911 

10,000 board feet or more 654,985 11,585 283,403 949,973 

 Total 7,220,517 2,444,523 7,943,651 17,608,691 

 

 a

International -inch rule. 

Table 30--Area of nonreserved forest land by forest type and stocking condition, Arizona, 1999 

 

 Stocking condition 

 Medium 

 Fully to fully Poorly 

 Overstocked stocked stocked stocked Nonstocked 

Forest type timberland timberland timberland timberland timberland Woodland Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Aspen 15,445 49,238 27,547 11,083 -- -- 103,313 

Blue spruce -- 7,375 7,889 1,742 -- -- 17,006 

Cottonwood -- 6,223 4,530 2,973 -- -- 13,726 

Deciduous woodland oak -- -- -- -- -- 282,842 282,842 

Douglas-fir 26,827 61,043 84,557 35,059 -- -- 207,487 

Engelmann spruce 1,580 47,241 24,706 33,483 -- -- 107,010 

Evergreen oak -- -- -- -- -- 1,404,771 1,404,771 

Juniper -- -- -- -- -- 2,992,979 2,992,979 

Mesquite -- -- -- -- -- 1,338,250 1,338,250 

Misc. western hardwoods -- -- -- -- -- 112,434 112,434 

Other western softwoods -- 20,141 17,109 23,621 -- -- 60,870 

Pinyon-juniper -- -- -- -- -- 6,982,690 6,982,690 

Ponderosa pine 32,287 640,960 1,249,318 954,580 -- -- 2,877,145 

Spruce-fir -- 11,918 -- -- -- -- 11,918 

White fir 1,223 34,146 31,579 6,271 -- -- 73,219 

Nonstocked timberland -- -- -- -- 93,268 -- 93,268 

Nonstocked woodland -- -- -- -- -- 929,764 929,764 

 All types 77,362 878,284 1,447,236 1,068,812 93,268 14,043,730 17,608,691 
64 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 31--Area of nonreserved forest land by forest type and stand-age class, Arizona, 1999 Stand-age class Nonstocked/ All Forest type Unclassified 1-50 51-100 101-150 151-200 201-250 251-300 301-350 351-400 401-450 classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Aspen -- 26,957 61,994 14,363 -- -- -- -- -- -- 103,313 Blue spruce -- 3,148 13,858 -- -- -- -- -- -- -- 17,006 Cottonwood -- 2,973 4,530 6,223 -- -- -- -- -- -- 13,726 Deciduous woodland oak 12,057 102,635 81,044 87,106 -- -- -- -- -- -- 282,842 Douglas-fir -- 16,234 81,843 73,158 29,893 6,358 -- -- -- -- 207,487 Engelmann spruce -- 3,354 65,272 31,356 7,027 -- -- -- -- -- 107,010 Evergreen oak 111,833 101,250 221,324 569,529 255,909 90,716 52,541 1,669 -- -- 1,404,771 Juniper 64,266 220,858 1,327,842 882,397 383,099 31,808 76,558 4,580 -- 1,572 2,992,979 Mesquite 215,286 739,147 209,050 110,201 48,923 12,588 3,053 -- -- -- 1,338,250 Misc. western hardwoods 58,751 24,177 23,615 -- 5,891 -- -- -- -- -- 112,434 Other western softwoods -- 11,037 12,617 15,190 22,026 -- -- -- -- -- 60,870 Pinyon-juniper 166,025 600,765 1,937,937 2,260,043 1,349,510 404,513 191,128 53,757 11,829 7,182 6,982,690 Ponderosa pine -- 143,422 1,623,123 869,270 212,474 16,427 6,354 6,075 -- -- 2,877,145 Spruce-fir -- -- 4,890 -- 7,027 -- -- -- -- -- 11,918 White fir -- -- 21,643 45,299 6,276 -- -- -- -- -- 73,219 Nonstocked timberland 93,268 -- -- -- -- -- -- -- -- -- 93,268 Nonstocked woodland 929,764 -- -- -- -- -- -- -- -- -- 929,764 All types 1,651,250 1,995,957 5,690,584 4,964,136 2,328,057 562,409 329,634 66,082 11,829 8,754 17,608,691 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 65 Table 32--Number of live trees on nonreserved forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 94,154 53,692 32,247 22,259 15,693 11,122 7,699 5,544 3,237 2,469 1,568 1,061 1,228 880 2,111 254,964 Apache pine 486 486 39 39 117 39 -- -- -- 39 -- -- -- -- -- 1,245 Arizona cypress 7,801 1,941 723 341 302 115 187 -- 39 37 -- -- -- -- -- 11,487 Arizona pinyon pinea 17,945 5,670 5,905 3,532 2,091 1,400 784 320 112 40 32 -- -- -- -- 37,833 Blue spruce 474 553 433 245 327 330 188 44 38 38 -- -- -- -- -- 2,670 Border pinyona 11,525 5,684 5,133 3,659 1,426 545 302 116 80 39 -- -- -- -- -- 28,509 California juniper a 898 898 349 267 289 239 -- -- -- -- -- -- -- -- -- 2,941 Chihuahua pine 1,886 943 1,029 531 303 151 38 -- -- -- -- -- -- -- -- 4,881 Corkbark fir 5,968 2,823 1,367 830 635 360 283 282 85 -- 29 -- -- -- -- 12,662 Douglas-fir 52,655 25,852 14,427 9,844 7,138 3,991 2,802 1,872 1,212 744 392 331 388 119 725 122,490 Engelmann spruce 13,099 13,315 4,524 3,653 2,916 2,406 1,298 731 618 550 283 42 -- -- 38 43,474 Mexican pinyon pinea 1,439 944 769 425 114 -- 39 38 -- -- -- -- -- -- -- 3,768 Oneseed juniper a 47,815 25,632 28,088 24,562 23,360 22,135 16,591 16,256 10,759 9,378 7,303 4,244 3,234 1,924 4,017 245,296 Ponderosa pine 209,375 151,275 106,359 85,188 63,509 42,231 26,736 16,579 10,997 7,376 5,019 3,820 1,757 1,431 1,648 733,299 Redberry juniper a 465 -- 268 325 150 487 301 298 150 -- -- 37 30 39 37 2,588 Rocky Mountain juniper a 23,022 13,983 4,587 3,262 1,886 1,751 1,003 789 712 304 196 185 115 -- 310 52,106 Singleleaf pinyona 8,126 3,400 2,974 2,424 1,427 1,001 402 171 73 -- 41 -- -- -- -- 20,038 Southwestern white pine 4,559 969 2,002 1,866 993 517 658 352 44 104 59 67 44 37 44 12,314 Subalpine fir 367 -- 134 118 146 201 39 67 -- -- -- -- -- -- -- 1,072 Twoneedle pinyona 285,551 149,195 107,875 76,310 48,240 31,147 15,708 7,564 3,496 2,224 899 242 354 -- -- 728,804 Utah juniper a 120,563 60,162 63,031 50,785 42,438 31,669 23,877 20,159 15,363 13,067 8,807 5,110 4,094 2,862 4,017 466,003 White fir 26,456 9,350 5,467 4,435 3,034 2,136 1,227 832 836 347 395 151 73 237 52 55,028 Softwood total 934,626 526,769 387,730 294,902 216,533 153,972 100,161 72,015 47,851 36,758 25,022 15,290 11,317 7,528 12,998 2,843,472 Arizona white oaka 81,876 44,331 40,158 31,496 21,060 12,699 7,869 4,683 2,599 1,776 1,003 520 266 -- 316 250,651 Aspen 43,207 10,589 5,626 4,973 4,456 3,174 1,713 1,328 328 213 38 -- -- -- -- 75,646 Bigtooth maplea 5,686 2,870 944 305 78 35 194 -- -- -- -- -- -- -- -- 10,112 Cottonwood -- 933 112 150 112 37 37 37 37 -- -- -- -- -- -- 1,458 Desert ironwooda 859 3,109 640 429 270 74 68 123 184 -- -- -- -- 57 -- 5,812 Emory oaka 46,302 19,848 20,100 17,686 11,310 6,104 3,985 1,791 1,481 451 308 106 64 33 -- 129,571 Gambel oaka 435,495 87,330 59,285 23,253 8,635 4,664 2,236 1,294 835 820 340 436 264 119 261 625,269 Mesquitea 59,918 18,783 14,552 9,982 6,310 3,278 1,723 998 491 115 -- -- -- -- -- 116,150 Mexican blue oaka -- -- 867 1,246 738 1,288 952 147 109 182 109 72 74 35 -- 5,821 New Mexico locust a 74,824 8,563 956 191 38 71 -- -- -- -- -- -- -- -- -- 84,643 Oak--evergreena 15,666 7,302 4,285 1,750 1,853 784 375 -- 280 -- -- -- -- -- -- 32,295 Rocky Mountain maplea -- -- 177 35 109 35 -- -- -- -- -- -- -- -- -- 357 Silverleaf oaka 31,814 10,525 5,421 3,372 2,102 912 342 419 203 74 76 -- 76 -- -- 55,337 Velvet mesquitea 13,551 3,713 5,579 3,715 2,389 952 586 295 257 208 74 -- -- 37 -- 31,358 W. honey mesquitea 8,952 8,813 2,829 1,886 1,560 425 225 74 74 -- -- -- -- -- 74 24,911 Hardwood total 818,151 226,710 161,533 100,471 61,022 34,532 20,306 11,190 6,878 3,840 1,948 1,135 744 282 650 1,449,391 All species 1,752,777 753,478 549,264 395,373 277,555 188,504 120,467 83,205 54,729 40,597 26,969 16,425 12,062 7,810 13,648 4,292,863 

aDiameter taken at root collar rather than at breast height.
66 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 33--Total oven-dry weight of biomass of all live trees on nonreserved forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand tons - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 54 198 277 441 624 713 805 816 677 714 581 509 669 568 2,496 10,142 Apache pine 2 10 2 2 16 8 -- -- -- 36 -- -- -- -- -- 77 Arizona cypress 39 42 27 20 30 19 51 -- 20 30 -- -- -- -- -- 279 Arizona pinyon pinea 12 22 102 143 161 188 147 89 38 22 12 -- -- -- -- 936 Blue spruce 2 12 20 26 56 94 70 22 27 38 -- -- -- -- -- 366 Border pinyona 5 15 65 107 96 62 43 22 21 12 -- -- -- -- -- 450 California juniper a 1 3 2 5 6 7 -- -- -- -- -- -- -- -- -- 23 Chihuahua pine 9 20 42 31 34 26 14 -- -- -- -- -- -- -- -- 176 Corkbark fir 30 61 55 69 107 96 118 184 55 -- 39 -- -- -- -- 814 Douglas-fir 290 633 711 973 1,256 1,097 1,171 1,076 939 742 483 476 664 235 2,622 13,369 Engelmann spruce 79 286 178 345 505 659 558 406 512 580 418 80 -- -- 80 4,686 Mexican pinyon pinea (

b) 2 12 14 6 -- 5 7 -- -- -- -- -- -- -- 46 

Oneseed juniper a 24 89 192 392 729 1,095 1,325 1,943 1,770 1,976 2,075 1,379 1,196 865 2,989 18,038 

Ponderosa pine 1,047 3,025 5,068 7,084 9,449 10,400 10,139 9,144 8,624 7,734 7,557 7,152 4,065 3,870 6,592 100,950 Redberry juniper a (

b) -- 2 6 5 29 28 49 23 -- -- 17 13 27 29 227 

Rocky Mountain juniper a 16 72 62 90 108 152 132 139 172 105 82 83 87 -- 241 1,542 

Singleleaf pinyona 3 13 49 102 100 122 74 51 25 -- 27 -- -- -- -- 565 

Southwestern white pine 23 21 96 143 143 119 226 182 23 90 69 92 90 82 120 1,518 Subalpine fir 2 -- 5 10 24 61 18 35 -- -- -- -- -- -- -- 156 Twoneedle pinyona 139 575 1,651 2,674 3,254 3,501 2,628 1,800 1,033 833 391 122 219 -- -- 18,821 

Utah juniper a 68 200 453 866 1,400 1,797 2,022 2,508 2,714 2,950 2,591 1,702 1,758 1,360 2,769 25,157 

White fir 132 201 238 388 465 512 441 427 578 312 441 236 126 519 107 5,123  Softwood total 1,979 5,501 9,306 13,931 18,576 20,755 20,014 18,900 17,250 16,176 14,766 11,846 8,887 7,526 18,046 203,460 

Arizona white oaka 135 339 1,106 1,799 2,079 1,985 1,842 1,600 1,093 930 716 431 256 -- 542 14,853 

Aspen 86 101 253 531 952 1,125 850 953 287 204 43 -- -- -- -- 5,385 Bigtooth maplea 13 32 37 30 20 7 73 -- -- -- -- -- -- -- -- 212 

Cottonwood -- 9 3 9 14 8 11 14 20 -- -- -- -- -- -- 87 Desert ironwooda 1 31 11 19 16 10 9 28 64 -- -- -- -- 45 -- 234 

Emory oaka 71 147 545 965 1,175 1,006 996 648 696 238 214 94 78 54 -- 6,928 

Gambel oaka 903 1,070 2,931 2,415 1,693 1,446 966 753 623 714 370 493 384 221 652 15,634 

Mesquitea 132 166 460 647 693 652 456 315 261 68 -- -- -- -- -- 3,852 

Mexican blue oaka -- -- 26 74 76 184 210 47 48 102 60 66 72 32 -- 996 

New Mexico locust a 137 115 63 21 7 19 -- -- -- -- -- -- -- -- -- 362 

Oak--evergreena 23 46 104 73 151 91 58 -- 107 -- -- -- -- -- -- 653 

Rocky Mountain maplea -- -- 7 3 17 7 -- -- -- -- -- -- -- -- -- 33 

Silverleaf oaka 58 81 183 232 246 199 111 165 91 54 60 -- 78 -- -- 1,558 

Velvet mesquitea 18 27 170 214 277 180 176 116 126 119 53 -- -- 23 -- 1,498 

W. honey mesquitea 23 62 93 122 232 82 67 26 42 -- -- -- -- -- 178 927 

 Hardwood total 1,601 2,227 5,994 7,155 7,648 6,998 5,825 4,664 3,459 2,429 1,515 1,083 868 375 1,372 53,212 

 All species 3,580 7,728 15,300 21,086 26,223 27,754 25,839 23,564 20,709 18,605 16,281 12,929 9,755 7,901 19,418 256,672 

aDiameter taken at root collar rather than at breast height. bLess than 500 tons. 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 67

Table 34--Net volume of all live trees on nonreserved forest land by forest type and 

 stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ All 

Forest type Sawtimber Poletimber seedling Nonstocked classes 

- - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - 

Aspen 166,673 78,986 1,770 -- 247,429 

Blue spruce 36,676 -- 243 -- 36,919 

Cottonwood 15,345 317 -- -- 15,662 

Deciduous woodland oak 158,418 112,213 24,935 -- 295,566 

Douglas-fir 606,342 16,157 4,760 -- 627,259 

Engelmann spruce 304,428 8,045 397 -- 312,870 

Evergreen oak 755,667 48,434 5,245 -- 809,346 

Juniper 1,174,287 95,479 1,803 -- 1,271,570 

Mesquite 79,083 70,195 6,207 -- 155,484 

Misc. western hardwoods 2,671 561 3,644 -- 6,876 

Other western softwoods 65,004 1,118 6,408 -- 72,529 

Pinyon-juniper 3,821,314 704,620 21,521 -- 4,547,455 

Ponderosa pine 5,107,766 98,567 26,677 -- 5,233,010 

Spruce-fir 50,079 -- -- -- 50,079 

White fir 210,140 -- -- -- 210,140 

Nonstocked timberland -- -- -- 10,620 10,620 

Nonstocked woodland -- -- -- 33,817 33,817 

 All types 12,553,892 1,234,693 103,610 44,437 13,936,631 
68 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 35--Net volume of all live trees on nonreserved forest land by species and 

 owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

 - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Alligator juniper 438,884 7,335 351,030 797,249 

Apache pine 3,178 -- -- 3,178 

Arizona cypress 8,127 -- -- 8,127 

Arizona pinyon pine 67,489 -- 7,786 75,275 

Blue spruce 1,390 -- 21,546 22,936 

Border pinyon 30,440 3,342 2,428 36,210 

California juniper -- 1,162 647 1,809 

Chihuahua pine 783 -- 5,197 5,980 

Corkbark fir 21,939 -- 26,159 48,098 

Douglas-fir 432,042 -- 211,629 643,670 

Engelmann spruce 132,936 -- 158,643 291,579 

Mexican pinyon pine 3,697 -- -- 3,697 

Oneseed juniper 344,279 98,622 870,345 1,313,247 

Ponderosa pine 3,364,909 74,158 1,518,406 4,957,473 

Redberry juniper 14,284 -- 4,341 18,625 

Rocky Mountain juniper 30,009 99 83,440 113,548 

Singleleaf pinyon 24,044 -- 21,336 45,380 

Southwestern white pine 70,956 -- 15,789 86,745 

Subalpine fir 10,084 -- -- 10,084 

Twoneedle pinyon 495,282 99,726 900,811 1,495,820 

Utah juniper 548,689 511,155 877,768 1,937,613 

White fir 217,131 -- 48,170 265,301 

 Softwood total 6,260,574 795,599 5,125,472 12,181,645 

Arizona white oak 250,419 3,243 209,394 463,056 

Aspen 136,100 -- 154,947 291,047 

Bigtooth maple 312 -- 7,552 7,864 

Cottonwood 3,055 -- 1,775 4,830 

Desert ironwood 148 4,141 1,769 6,058 

Emory oak 147,198 3,890 94,144 245,231 

Gambel oak 271,416 10,661 186,233 468,310 

Mesquite 25 42,356 54,526 96,907 

Mexican blue oak 32,438 -- 490 32,928 

New Mexico locust 1,575 281 1,613 3,469 

Oak--evergreen 833 5,322 11,435 17,590 

Rocky Mountain maple 1,385 -- 133 1,517 

Silverleaf oak 39,010 -- 8,465 47,474 

Velvet mesquite 25,810 5,044 12,005 42,858 

W. honey mesquite 25,622 -- 226 25,848 

 Hardwood total 935,343 74,936 744,707 1,754,987 

 All species 7,195,917 870,535 5,870,179 13,936,631 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

Diameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 69 Table 36--Net volume of all live trees on nonreserved forest land by species and diameter class, Arizona, 1999 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 28,003 41,891 56,286 63,258 69,482 68,883 56,497 57,696 44,835 38,754 51,843 42,885 176,936 797,249 Apache pine 53 107 805 408 -- -- -- 1,806 -- -- -- -- -- 3,178 Arizona cypress 658 827 1,339 853 2,204 -- 825 1,422 -- -- -- -- -- 8,127 Arizona pinyon pinea 8,827 12,202 13,476 15,636 12,092 7,190 3,115 1,777 960 -- -- -- -- 75,275 Blue spruce 968 1,568 3,495 6,295 4,676 1,372 1,859 2,703 -- -- -- -- -- 22,936 Border pinyona 5,684 9,208 8,069 5,134 3,582 1,851 1,698 983 -- -- -- -- -- 36,210 California juniper a 181 477 527 623 -- -- -- -- -- -- -- -- -- 1,809 Chihuahua pine 1,193 1,298 1,616 1,194 680 -- -- -- -- -- -- -- -- 5,980 Corkbark fir 2,640 3,919 6,881 6,434 8,239 13,174 3,925 -- 2,886 -- -- -- -- 48,098 Douglas-fir 28,781 43,804 60,608 55,137 61,121 56,572 50,463 40,384 26,558 26,046 35,806 12,910 145,480 643,670 Engelmann spruce 8,150 20,019 32,087 43,367 38,313 28,383 36,853 42,312 30,383 6,062 -- -- 5,649 291,579 Mexican pinyon pinea 1,037 1,182 495 -- 390 593 -- -- -- -- -- -- -- 3,697 Oneseed juniper a 18,348 35,170 61,057 90,186 104,100 147,791 134,037 142,686 148,717 98,691 83,510 58,329 190,626 1,313,247 Ponderosa pine 179,526 356,240 502,577 551,277 530,334 471,510 443,732 394,393 400,723 375,829 212,168 201,130 338,033 4,957,473 Redberry juniper a 193 534 494 2,600 2,399 4,009 1,981 -- -- 1,337 1,058 2,114 1,905 18,625 Rocky Mountain juniper a 5,570 7,831 9,028 12,451 10,452 10,925 12,924 7,723 6,233 6,221 6,685 -- 17,506 113,548 Singleleaf pinyona 4,247 8,646 8,408 10,112 6,031 4,114 1,703 -- 2,119 -- -- -- -- 45,380 Southwestern white pine 3,743 7,722 8,149 6,717 12,992 11,400 1,317 5,020 4,486 6,036 5,792 5,528 7,842 86,745 Subalpine fir 238 593 1,466 4,199 1,298 2,290 -- -- -- -- -- -- -- 10,084 Twoneedle pinyona 143,428 227,411 272,281 289,560 214,239 142,931 81,911 66,709 30,482 9,709 17,159 -- -- 1,495,820 Utah juniper a 42,592 79,143 121,021 150,567 166,268 198,618 212,856 222,466 195,185 127,143 128,801 99,126 193,825 1,937,613 White fir 9,821 18,721 23,986 27,905 24,792 24,750 34,202 18,383 25,558 11,416 7,830 31,377 6,560 265,301 Softwood total 493,881 878,515 1,194,150 1,343,914 1,273,685 1,196,356 1,079,896 1,006,465 919,125 707,245 550,651 453,399 1,084,362 12,181,645 Arizona white oak a 30,374 53,620 65,516 65,048 61,488 55,237 36,315 31,594 26,068 14,466 8,146 -- 15,185 463,056 Aspen 14,815 30,294 54,921 63,340 45,318 54,439 15,030 10,177 2,713 -- -- -- -- 291,047 Bigtooth maplea 1,516 1,376 1,013 312 3,648 -- -- -- -- -- -- -- -- 7,864 Cottonwood 163 565 857 471 668 878 1,230 -- -- -- -- -- -- 4,830 Desert ironwood a 280 544 344 338 301 978 1,975 -- -- -- -- 1,298 -- 6,058 Emory oaka 16,792 32,321 41,916 36,824 38,396 25,502 27,376 8,887 7,707 4,101 3,524 1,885 -- 245,231 Gambel oaka 90,926 80,671 60,897 51,481 35,654 28,272 23,161 26,013 12,795 16,511 14,317 9,139 18,472 468,310 Mesquitea 11,222 17,016 18,549 18,152 13,503 8,747 7,534 2,183 -- -- -- -- -- 96,907 Mexican blue oaka 746 2,146 2,456 5,822 6,913 1,663 1,634 3,540 2,006 2,178 2,794 1,030 -- 32,928 New Mexico locusta 2,011 648 240 570 -- -- -- -- -- -- -- -- -- 3,469 Oak--evergreena 2,691 2,091 4,348 2,782 1,822 -- 3,857 -- -- -- -- -- -- 17,590 Rocky Mountain maplea 286 125 777 330 -- -- -- -- -- -- -- -- -- 1,517 Silverleaf oak a 5,211 7,265 8,036 6,980 4,021 5,774 2,843 2,108 2,248 -- 2,988 -- -- 47,474 Velvet mesquitea 4,340 5,842 8,030 5,458 5,513 3,595 4,096 3,800 1,713 -- -- 470 -- 42,858 W. honey mesquitea 2,410 3,419 6,890 2,481 2,091 831 1,407 -- -- -- -- -- 6,319 25,848 Hardwood total 183,784 237,941 274,788 260,387 219,336 185,915 126,458 88,302 55,251 37,257 31,768 13,822 39,976 1,754,987 All species 677,665 1,116,456 1,468,938 1,604,301 1,493,021 1,382,271 1,206,354 1,094,767 974,376 744,502 582,420 467,222 1,124,338 13,936,631 

aDiameter taken at root collar rather than at breast height.
70 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 37--Net volume of all live trees on nonreserved forest land by species and forest type, Arizona, 1999 Forest type Deciduous Misc. Other Blue woodland Engelmann Evergreen western Western Pinyon- Ponderosa White Nonstocked Nonstocked All Species Aspen spruce Cottonwood oak Douglas-fir spruce oak Juniper Mesquite hardwoods softwoods juniper pine Spruce-fir fir timberland woodland types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a -- -- 96 15,746 4,316 -- 113,118 223,801 -- 41 366 309,899 127,993 -- -- 231 1,643 797,249 Apache pine -- -- -- -- -- -- 3,178 -- -- -- -- -- -- -- -- -- -- 3,178 Arizona cypress -- -- -- -- -- -- 194 -- -- -- 7,016 94 822 -- -- -- -- 8,127 Arizona pinyon pinea -- -- -- -- -- -- 6,558 -- -- -- 2,644 65,778 -- -- -- -- 295 75,275 Blue spruce 69 22,867 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 22,936 Border pinyona -- -- -- -- -- -- 8,891 -- -- -- -- 26,992 -- -- -- -- 327 36,210 California juniper a -- -- -- -- -- -- -- 1,678 -- -- -- 131 -- -- -- -- -- 1,809 Chihuahua pine -- -- -- 66 -- -- 1,571 347 -- -- 1,820 -- 2,176 -- -- -- -- 5,980 Corkbark fir 2,965 -- -- -- 10,616 8,624 -- -- -- -- 4,316 -- 778 20,800 -- -- -- 48,098 Douglas-fir 16,902 2,189 -- 12,384 370,956 52,154 1,399 4,744 -- 465 7,025 6,335 134,036 2,228 32,854 -- -- 643,670 Engelmann spruce 12,004 -- -- -- 20,812 195,034 -- -- -- -- 352 -- 40,607 16,206 6,564 -- -- 291,579 Mexican pinyon pinea -- -- -- -- -- -- 1,693 -- -- -- -- 1,761 -- -- -- -- 243 3,697 Oneseed juniper a -- -- -- 38 933 -- 3,868 378,640 1,566 -- -- 918,317 2,429 -- -- 130 7,326 1,313,247 Ponderosa pine 34,902 3,660 4,763 106,678 79,089 19,814 37,680 69,488 -- 103 1,748 137,398 4,437,551 -- 15,788 8,505 304 4,957,473 Redberry juniper a -- -- 195 -- -- -- 1,042 13,630 849 149 -- 1,093 -- -- -- -- 1,667 18,625 Rocky Mountain juniper a 341 -- -- 4,321 3,214 -- 2,723 5,435 -- -- -- 74,878 22,345 -- -- 291 -- 113,548 Singleleaf pinyona -- -- -- -- -- -- 3,969 -- 42 -- -- 38,327 867 -- -- -- 2,175 45,380 Southwestern white pine 2,217 1,078 -- 417 15,969 1,482 208 -- -- -- 37,886 -- 22,552 131 4,806 -- -- 86,745 Subalpine fir -- -- -- -- -- 3,466 -- -- -- -- -- -- 2,224 4,394 -- -- -- 10,084 Twoneedle pinyona -- -- -- 1,884 3,419 -- 23,178 -- -- -- 1,599 1,437,679 25,516 -- -- 839 1,706 1,495,820 Utah juniper a -- -- 883 1,014 31 -- 9,405 511,825 -- -- -- 1,396,282 13,239 -- -- -- 4,933 1,937,613 White fir 11,382 821 -- -- 64,926 1,026 -- -- -- 793 270 -- 50,562 1,395 134,128 -- -- 265,301 Softwood total 80,781 30,615 5,937 142,548 574,281 281,601 218,674 1,209,588 2,458 1,551 65,043 4,414,962 4,883,698 45,153 194,140 9,996 20,620 12,181,645 Arizona white oaka -- -- 2,817 1,627 251 -- 280,325 28,185 -- 1,033 33 89,209 58,029 -- -- -- 1,548 463,056 Aspen 164,893 6,304 -- 292 29,171 31,269 -- -- -- 512 6,142 -- 37,762 4,926 9,776 -- -- 291,047 Bigtooth maplea -- -- -- 3,896 636 -- -- 312 -- -- -- 578 373 -- 2,069 -- -- 7,864 Cottonwood -- -- 4,559 -- -- -- 271 -- -- -- -- -- -- -- -- -- -- 4,830 Desert ironwood a -- -- -- -- -- -- -- -- 2,590 3,379 -- -- -- -- -- -- 89 6,058 Emory oak a -- -- 1,677 1,082 1,382 -- 209,199 7,357 -- -- 270 13,949 6,314 -- -- -- 4,002 245,231 Gambel oak a 218 -- 672 144,563 19,751 -- 8,868 18,449 -- 401 367 24,763 245,660 -- 3,972 624 -- 468,310 Mesquitea -- -- -- -- -- -- -- 1,552 95,170 -- -- 25 -- -- -- -- 160 96,907 Mexican blue oak a -- -- -- -- -- -- 28,948 2,157 1,146 -- -- -- -- -- -- -- 677 32,928 New Mexico locust a 1,537 -- -- 281 424 -- 208 128 -- -- -- -- 710 -- 181 -- -- 3,469 Oak--evergreena -- -- -- 1,125 -- -- 13,378 159 -- -- 674 2,185 70 -- -- -- -- 17,590 Rocky Mountain maplea -- -- -- 153 1,364 -- -- -- -- -- -- -- -- -- -- -- -- 1,517 Silverleaf oak a -- -- -- -- -- -- 44,880 -- -- -- -- 1,597 394 -- -- -- 603 47,474 Velvet mesquite a -- -- -- -- -- -- 4,165 672 33,431 -- -- 114 -- -- -- -- 4,477 42,858 W. honey mesquitea -- -- -- -- -- -- 431 3,013 20,690 -- -- 73 -- -- -- -- 1,641 25,848 Hardwood total 166,648 6,304 9,725 153,019 52,979 31,269 590,673 61,982 153,027 5,324 7,487 132,493 349,312 4,926 16,000 624 13,197 1,754,987 All species 247,429 36,919 15,662 295,566 627,259 312,870 809,346 1,271,570 155,484 6,876 72,529 4,547,455 5,233,010 50,079 210,140 10,620 33,817 13,936,631 aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 71

Table 38--Net annual growth of all live trees on nonreserved forest land by species 

 and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Alligator juniper 2,961 59 2,568 5,588 

Apache pine 55 -- -- 55 

Arizona cypress 160 -- -- 160 

Arizona pinyon pine 1,113 -- -54 1,060 

Blue spruce 59 -- 682 742 

Border pinyon 408 97 52 557 

California juniper -- 14 14 27 

Chihuahua pine 27 -- 135 162 

Corkbark fir 713 -- 256 969 

Douglas-fir 5,635 -- 5,839 11,474 

Engelmann spruce 796 -- 1,669 2,465 

Mexican pinyon pine 80 -- -- 80 

Oneseed juniper 2,620 590 5,267 8,477 

Ponderosa pine 73,663 2,186 32,987 108,837 

Redberry juniper 102 -- 42 145 

Rocky Mountain juniper 226 2 616 844 

Singleleaf pinyon 377 -- 134 511 

Southwestern white pine 1,465 -- 495 1,960 

Subalpine fir 201 -- -- 201 

Twoneedle pinyon 5,633 1,634 9,002 16,268 

Utah juniper 3,958 4,325 5,656 13,938 

White fir 3,236 -- 1,351 4,587 

 Softwood total 103,490 8,907 66,709 179,106 

Arizona white oak 1,917 25 2,098 4,039 

Aspen 1,491 -- 1,223 2,714 

Bigtooth maple 4 -- 323 327 

Cottonwood 101 -- 124 226 

Desert ironwood 1 18 34 53 

Emory oak 1,408 20 1,016 2,444 

Gambel oak 4,627 331 3,058 8,017 

Mesquite (b

) 287 421 708 

Mexican blue oak 222 -- 6 228 

New Mexico locust 73 141 9 224 

Oak--evergreen 7 47 70 125 

Rocky Mountain maple 14 -- 2 17 

Silverleaf oak 474 -- 78 552 

Velvet mesquite 311 43 153 507 

W. honey mesquite 346 -- 2 348 

 Hardwood total 10,998 912 8,618 20,527 

 All species 114,487 9,819 75,327 199,633 

 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

Diameter taken at root collar rather than at breast height.

b

Less than 500 cubic feet.
72 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 39--Net annual growth of all live trees on nonreserved forest land by species and diameter class, Arizona, 1998 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 1,217 593 660 619 578 446 422 287 200 143 192 144 88 5,588 Apache pine 3 3 18 9 -- -- -- 22 -- -- -- -- -- 55 Arizona cypress 75 15 21 11 21 -- 9 8 -- -- -- -- -- 160 Arizona pinyon pinea 565 211 66 39 100 45 14 18 2 -- -- -- -- 1,060 Blue spruce 54 34 169 228 92 44 54 67 -- -- -- -- -- 742 Border pinyona 264 75 68 75 41 13 17 4 -- -- -- -- -- 557 California juniper a 4 7 9 7 -- -- -- -- -- -- -- -- -- 27 Chihuahua pine 55 37 33 28 10 -- -- -- -- -- -- -- -- 162 Corkbark fir 439 116 36 104 -54 240 25 -- 62 -- -- -- -- 969 Douglas-fir 2,762 1,703 2,332 1,601 1,469 960 1,082 736 -602 -499 398 180 -649 11,474 Engelmann spruce 794 716 653 643 632 -190 184 -590 442 -852 -- -- 35 2,465 Mexican pinyon pinea 73 18 -19 -- 4 5 -- -- -- -- -- -- -- 80 Oneseed juniper a 1,030 540 712 897 846 906 843 712 713 342 275 167 495 8,477 Ponderosa pine 15,592 13,159 16,424 15,431 12,253 9,572 7,369 5,209 5,174 3,962 1,025 1,705 1,964 108,837 Redberry juniper a 6 8 6 25 29 36 14 -- -- 5 5 8 3 145 Rocky Mountain juniper a 205 115 107 104 90 71 45 25 17 12 14 -- 40 844 Singleleaf pinyona 211 151 123 115 67 -168 5 -- 7 -- -- -- -- 511 Southwestern white pine 404 316 242 108 348 156 12 40 44 127 47 37 77 1,960 Subalpine fir -45 -93 -24 229 77 58 -- -- -- -- -- -- -- 201 Twoneedle pinyona 6,736 2,749 2,609 2,205 1,244 280 -54 297 136 23 41 -- -- 16,268 Utah juniper a 2,454 1,194 1,374 1,376 1,304 1,379 1,375 1,085 776 429 405 280 507 13,938 White fir 623 615 741 915 156 560 763 311 438 107 89 274 -1,005 4,587 Softwood total 33,520 22,281 26,357 24,768 19,305 14,414 12,181 8,231 7,411 3,799 2,491 2,794 1,555 179,106 Arizona white oaka 1,487 641 581 476 378 320 171 -52 92 -122 38 -- 29 4,039 Aspen 540 295 396 704 473 526 270 -576 87 -- -- -- -- 2,714 Bigtooth maplea 245 20 17 4 41 -- -- -- -- -- -- -- -- 327 Cottonwood 55 48 36 10 12 27 38 -- -- -- -- -- -- 226 Desert ironwooda 29 5 2 2 1 4 7 -- -- -- -- 3 -- 53 Emory oaka 843 338 373 320 247 128 95 30 28 9 15 19 -- 2,444 Gambel oaka 5,298 973 566 310 242 177 101 108 43 49 82 22 44 8,017 Mesquitea 327 107 142 18 59 30 20 5 -- -- -- -- -- 708 Mexican blue oaka 12 30 31 49 51 12 5 12 7 6 8 4 -- 228 New Mexico locust a 216 4 1 3 -- -- -- -- -- -- -- -- -- 224 Oak--evergreena 97 9 -20 16 9 -- 14 -- -- -- -- -- -- 125 Rocky Mountain maplea 4 3 7 3 -- -- -- -- -- -- -- -- -- 17 Silverleaf oak a 259 85 73 54 26 28 12 6 5 -- 4 -- -- 552 Velvet mesquitea 167 83 108 55 38 15 16 18 6 -- -- 1 -- 507 W. honey mesquitea 168 56 73 19 13 3 6 -- -- -- -- -- 10 348 Hardwood total 9,749 2,696 2,386 2,042 1,589 1,267 755 -448 269 -59 147 49 83 20,527 All species 43,269 24,977 28,743 26,810 20,894 15,681 12,936 7,782 7,680 3,740 2,639 2,843 1,638 199,633 

aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 73

Table 40--Annual mortality of all trees on nonreserved forest land by species and 

 owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Alligator juniper 361 -- 146 507 

Apache pine -- -- -- -- 

Arizona cypress -- -- -- -- 

Arizona pinyon pine 125 -- 144 269 

Blue spruce -- -- 39 39 

Border pinyon 142 -- -- 142 

California juniper -- -- -- -- 

Chihuahua pine 11 -- -- 11 

Corkbark fir 180 -- 367 547 

Douglas-fir 4,289 -- 202 4,491 

Engelmann spruce 2,836 -- 1,829 4,665 

Mexican pinyon pine 27 -- -- 27 

Oneseed juniper 18 -- 131 150 

Ponderosa pine 4,627 -- 2,704 7,331 

Redberry juniper -- -- -- -- 

Rocky Mountain juniper 4 -- -- 4 

Singleleaf pinyon 13 -- 193 206 

Southwestern white pine -- -- 161 161 

Subalpine fir 291 -- -- 291 

Twoneedle pinyon 629 -- 1,772 2,401 

Utah juniper 191 -- -- 191 

White fir 1,640 -- 87 1,727 

 Softwood total 15,385 -- 7,775 23,161 

Arizona white oak 363 -- 289 652 

Aspen 1,790 -- 2,333 4,123 

Bigtooth maple -- -- -- -- 

Cottonwood -- -- -- -- 

Desert ironwood -- -- -- -- 

Emory oak 76 -- 24 100 

Gambel oak 373 -- 132 505 

Mesquite -- -- 141 141 

Mexican blue oak -- -- -- -- 

New Mexico locust -- -- -- -- 

Oak--evergreen -- 17 51 68 

Rocky Mountain maple -- -- -- -- 

Silverleaf oak 22 -- -- 22 

Velvet mesquite 8 -- -- 8 

W. honey mesquite -- -- -- -- 

 Hardwood total 2,632 17 2,970 5,619 

 All species 18,017 17 10,745 28,779 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

Diameter taken at root collar rather than at breast height.
74 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 41--Annual mortality of all trees on nonreserved forest land by species and diameter class, Arizona, 1998 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 7 5 18 -- 50 85 -- -- -- -- -- -- 343 507 Apache pine -- -- -- -- -- -- -- -- -- -- -- -- -- -- Arizona cypress -- -- -- -- -- -- -- -- -- -- -- -- -- -- Arizona pinyon pinea 7 -- 132 131 -- -- -- -- -- -- -- -- -- 269 Blue spruce 16 23 -- -- -- -- -- -- -- -- -- -- -- 39 Border pinyona 19 72 52 -- -- -- -- -- -- -- -- -- -- 142 California juniper a -- -- -- -- -- -- -- -- -- -- -- -- -- -- Chihuahua pine -- 11 -- -- -- -- -- -- -- -- -- -- -- 11 Corkbark fir 14 86 173 115 159 -- -- -- -- -- -- -- -- 547 Douglas-fir 126 182 38 161 287 193 -- -- 1,044 818 -- -- 1,642 4,491 Engelmann spruce 133 222 417 528 223 687 371 1,163 -- 921 -- -- -- 4,665 Mexican pinyon pinea -- -- 27 -- -- -- -- -- -- -- -- -- -- 27 Oneseed juniper a -- -- 18 -- -- 131 -- -- -- -- -- -- -- 150 Ponderosa pine 742 1,481 647 450 643 344 341 1,137 379 -- 1,166 -- -- 7,331 Redberry juniper -- -- -- -- -- -- -- -- -- -- -- -- -- -- Rocky Mountain juniper a 4 -- -- -- -- -- -- -- -- -- -- -- -- 4 Singleleaf pinyona 13 -- -- -- -- 193 -- -- -- -- -- -- -- 206 Southwestern white pine 21 44 -- 96 -- -- -- -- -- -- -- -- -- 161 Subalpine fir 64 116 111 -- -- -- -- -- -- -- -- -- -- 291 Twoneedle pinyona 179 324 413 336 210 464 474 -- -- -- -- -- -- 2,401 Utah juniper a 12 19 24 73 62 -- -- -- -- -- -- -- -- 191 White fir 54 139 118 -- 372 -- -- -- -- -- -- -- 1,043 1,727 Softwood total 1,412 2,724 2,188 1,890 2,007 2,097 1,186 2,300 1,423 1,738 1,166 -- 3,028 23,161 Arizona white oaka 79 52 47 46 65 -- -- 183 -- 181 -- -- -- 652 Aspen 353 646 891 705 383 321 84 740 -- -- -- -- -- 4,123 Bigtooth maplea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Desert ironwooda -- -- -- -- -- -- -- -- -- -- -- -- -- -- Emory oaka 14 13 49 -- 24 -- -- -- -- -- -- -- -- 100 Gambel oaka 154 58 141 152 -- -- -- -- -- -- -- -- -- 505 Mesquitea -- 45 -- 95 -- -- -- -- -- -- -- -- -- 141 Mexican blue oak a -- -- -- -- -- -- -- -- -- -- -- -- -- -- New Mexico locust a -- -- -- -- -- -- -- -- -- -- -- -- -- -- Oak--evergreena -- 17 51 -- -- -- -- -- -- -- -- -- -- 68 Rocky Mountain maplea Silverleaf oaka 8 13 -- -- -- -- -- -- -- -- -- -- -- 22 Velvet mesquitea 8 -- -- -- -- -- -- -- -- -- -- -- -- 8 W. honey mesquitea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Hardwood total 616 845 1,180 998 471 321 84 923 -- 181 -- -- -- 5,619 All species 2,028 3,569 3,368 2,888 2,479 2,418 1,270 3,224 1,423 1,919 1,166 -- 3,028 28,779 

aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 75

Table 42--Annual mortality of all trees on nonreserved forest land by species and cause of death, Arizona, 1998 

 

 Cause of death 

Species Insects Disease Fire Animal Weather Suppression Unknown Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Alligator juniper 18 343 146 -- -- -- -- 507 

Apache pine -- -- -- -- -- -- -- -- 

Arizona cypress -- -- -- -- -- -- -- -- 

Arizona pinyon pine -- 144 59 -- -- -- 67 269 

Blue spruce -- -- -- -- -- 39 -- 39 

Border pinyon 9 -- 81 -- 52 -- -- 142 

California juniper -- -- -- -- -- -- -- -- 

Chihuahua pine -- 11 -- -- -- -- -- 11 

Corkbark fir 285 183 -- 79 -- -- -- 547 

Douglas-fir 3,315 686 256 -- 223 11 -- 4,491 

Engelmann spruce -- 4,568 58 22 -- 16 -- 4,665 

Mexican pinyon pine -- 27 -- -- -- -- -- 27 

Oneseed juniper -- -- 150 -- -- -- -- 150 

Ponderosa pine 2,050 1,790 496 -- 2,464 324 208 7,331 

Redberry juniper -- -- -- -- -- -- -- -- 

Rocky Mountain juniper -- -- -- -- -- -- 4 4 

Singleleaf pinyon 193 13 -- -- -- -- -- 206 

Southwestern white pine -- -- 96 64 -- -- -- 161 

Subalpine fir -- 65 226 -- -- -- -- 291 

Twoneedle pinyon 331 1,135 99 -- 645 -- 191 2,401 

Utah juniper -- 39 118 -- 35 -- -- 191 

White fir 40 1,640 -- 31 16 -- -- 1,727 

 Softwood total 6,242 10,644 1,784 196 3,434 390 470 23,161 

Arizona white oak -- 535 68 -- -- 38 11 652 

Aspen 63 3,455 55 -- 384 101 65 4,123 

Bigtooth maple -- -- -- -- -- -- -- -- 

Cottonwood -- -- -- -- -- -- -- -- 

Desert ironwood -- -- -- -- -- -- -- -- 

Emory oak -- 32 11 -- 34 24 -- 100 

Gambel oak -- 40 96 -- 194 40 136 505 

Mesquite -- 141 -- -- -- -- -- 141 

Mexican blue oak -- -- -- -- -- -- -- -- 

New Mexico locust -- -- -- -- -- -- -- -- 

Oak--evergreen -- -- -- -- -- -- 68 68 

Rocky Mountain maple -- -- -- -- -- -- -- -- 

Silverleaf oak 13 -- -- -- -- -- 8 22 

Velvet mesquite -- 4 4 -- -- -- -- 8 

W. honey mesquite -- -- -- -- -- -- -- -- 

 Hardwood total 77 4,206 234 -- 612 203 288 5,619 

 All species 6,318 14,850 2,018 196 4,046 593 758 28,779 

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

Diameter taken at root collar rather than at breast height.
76 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 43--Area of nonreserved forest land by county, Arizona

County (1999) (1999) (1998) (1998)

Area Volume Growth Mortality 

 - - - Acres- - - - - - - - - Thousand cubic feet - - - - - - - 

Apache 2,790,157 3,239,635 54,440 7,860 

Cochise 532,271 159,711 1,667 110 

Coconino 4,338,436 4,524,541 69,275 11,226 

Gila 1,751,918 1,372,690 16,769 2,384 

Graham 811,918 591,320 9,059 802 

Greenlee 499,346 467,168 6,167 2,177 

Maricopa 129,813 18,162 190 -- 

Mohave 1,227,048 472,138 4,921 -- 

Navajo 2,188,618 1,871,431 24,631 3,362 

Pima 985,548 188,083 1,701 158 

Pinal 200,625 35,363 295 4 

Santa Cruz 393,227 129,068 1,311 35 

Yavapai 1,747,539 866,788 9,203 662 

Yuma 12,229 534 3 -- 

 Total 17,608,691 13,936,631 199,633 28,779 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 77

Nonreserved Timberland

Table 44--Area of nonreserved timberlanda

 by forest type, stand-size class, and productivity 

 class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

 - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - 

Aspen 

 Sawtimber -- 46,408 14,202 -- 60,610 

 Poletimber -- 17,348 7,845 -- 25,193 

 Sapling/seedling -- -- 17,510 -- 17,510 

 Nonstocked -- -- -- -- -- 

 Total -- 63,756 39,557 -- 103,313 

Blue spruce 

 Sawtimber 1,580 12,277 -- -- 13,858 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- 3,148 -- -- 3,148 

 Nonstocked -- -- -- -- -- 

 Total 1,580 15,425 -- -- 17,006 

Cottonwood 

 Sawtimber -- -- 10,753 -- 10,753 

 Poletimber -- -- 2,973 -- 2,973 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 13,726 -- 13,726 

Douglas-fir 

 Sawtimber -- 86,537 98,028 -- 184,566 

 Poletimber -- -- 13,290 -- 13,290 

 Sapling/seedling 4,741 -- 4,890 -- 9,631 

 Nonstocked -- -- -- -- -- 

 Total 4,741 86,537 116,208 -- 207,487 

Engelmann spruce 

 Sawtimber 9,532 70,303 17,545 -- 97,380 

 Poletimber -- -- 6,276 -- 6,276 

 Sapling/seedling -- -- 3,354 -- 3,354 

 Nonstocked -- -- -- -- -- 

 Total 9,532 70,303 27,175 -- 107,010 

Other western softwoods 

 Sawtimber -- 7,289 10,892 25,364 43,545 

 Poletimber -- -- -- 6,288 6,288 

 Sapling/seedling -- 6,321 4,716 -- 11,037 

 Nonstocked -- -- -- -- -- 

 Total -- 13,611 15,608 31,652 60,870 

Ponderosa pine 

 Sawtimber 6,288 605,400 2,031,979 6,288 2,649,956 

 Poletimber -- -- 137,414 -- 137,414 

 Sapling/seedling -- 18,412 71,364 -- 89,776 

 Nonstocked -- -- -- -- -- 

 Total 6,288 623,813 2,240,756 6,288 2,877,145 

Spruce-fir 

 Sawtimber -- 4,890 7,027 -- 11,918 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 4,890 7,027 -- 11,918 

White fir 

 Sawtimber 4,716 48,293 20,209 -- 73,219 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 4,716 48,293 20,209 -- 73,219 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 18,934 74,333 -- 93,268 

 Total -- 18,934 74,333 -- 93,268 

All types 

 Sawtimber 22,117 881,399 2,210,636 31,652 3,145,803 

 Poletimber -- 17,348 167,797 6,288 191,434 

 Sapling/seedling 4,741 27,881 101,834 -- 134,456 

 Nonstocked -- 18,934 74,333 -- 93,268 

 Total 26,857 945,563 2,554,601 37,940 3,564,961 

 

 

a

On tables 44 through 81, nonreserved timberland includes all productivity classes for traditional 

timberland types and excludes juniper, pinyon-juniper, oak, mesquite, locust, and maple forest types. 
78 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 45--Area of National Forest nonreserved timberland by forest type, stand-size class, 

 and productivity class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

 - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - 

Aspen 

 Sawtimber -- 12,197 14,202 -- 26,399 

 Poletimber -- 4,890 7,845 -- 12,736 

 Sapling/seedling -- -- 17,510 -- 17,510 

 Nonstocked -- -- -- -- -- 

 Total -- 17,087 39,557 -- 56,645 

Blue spruce 

 Sawtimber -- 1,742 -- -- 1,742 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- 3,148 -- -- 3,148 

 Nonstocked -- -- -- -- -- 

 Total -- 4,890 -- -- 4,890 

Cottonwood 

 Sawtimber -- -- 6,223 -- 6,223 

 Poletimber -- -- 2,973 -- 2,973 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 9,196 -- 9,196 

Douglas-fir 

 Sawtimber -- 56,322 64,023 -- 120,344 

 Poletimber -- -- 9,745 -- 9,745 

 Sapling/seedling -- -- 4,890 -- 4,890 

 Nonstocked -- -- -- -- -- 

 Total -- 56,322 78,658 -- 134,979 

Engelmann spruce 

 Sawtimber 1,631 43,228 13,872 -- 58,730 

 Poletimber -- -- 6,276 -- 6,276 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 1,631 43,228 20,148 -- 65,006 

Other western softwoods 

 Sawtimber -- 7,289 10,892 19,076 37,257 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 7,289 10,892 19,076 37,257 

Ponderosa pine 

 Sawtimber -- 325,886 1,520,070 -- 1,845,956 

 Poletimber -- -- 86,680 -- 86,680 

 Sapling/seedling -- 6,603 42,608 -- 49,211 

 Nonstocked -- -- -- -- -- 

 Total -- 332,490 1,649,357 -- 1,981,847 

Spruce-fir 

 Sawtimber -- 4,890 -- -- 4,890 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 4,890 -- -- 4,890 

White fir 

 Sawtimber -- 40,490 20,209 -- 60,700 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 40,490 20,209 -- 60,700 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 12,859 56,084 -- 68,943 

 Total -- 12,859 56,084 -- 68,943 

All types 

 Sawtimber 1,631 492,045 1,649,490 19,076 2,162,242 

 Poletimber -- 4,890 113,518 -- 118,409 

 Sapling/seedling -- 9,751 65,008 -- 74,759 

 Nonstocked -- 12,859 56,084 -- 68,943 

 Total 1,631 519,546 1,884,100 19,076 2,424,352 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 79

Table 46--Area of other publicly owned nonreserved timberland by forest type, stand-size 

 class, and productivity class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

 - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - 

Aspen 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Blue spruce 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Cottonwood 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Douglas-fir 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Engelmann spruce 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Other western softwoods 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Ponderosa pine 

 Sawtimber -- -- 37,651 -- 37,651 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- 6,698 -- 6,698 

 Nonstocked -- -- -- -- -- 

 Total -- -- 44,349 -- 44,349 

Spruce-fir 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

White fir 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- -- -- -- 

All types 

 Sawtimber -- -- 37,651 -- 37,651 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- 6,698 -- 6,698 

 Nonstocked -- -- -- -- -- 

 Total -- -- 44,349 -- 44,349 
80 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 47--Area of nonindustrial private nonreserved timberland by forest type, stand-size 

 class, and productivity class, Arizona, 1999 

 

Forest type and Productivity class 

stand-size class 85-119 50-84 20-49 0-19 Total 

 - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - 

Aspen 

 Sawtimber -- 34,211 -- -- 34,211 

 Poletimber -- 12,458 -- -- 12,458 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- 46,668 -- -- 46,668 

Blue spruce 

 Sawtimber 1,580 10,535 -- -- 12,115 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 1,580 10,535 -- -- 12,115 

Cottonwood 

 Sawtimber -- -- 4,530 -- 4,530 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

-- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 4,530 -- 4,530 

Douglas-fir 

 Sawtimber -- 30,216 34,006 -- 64,221 

 Poletimber -- -- 3,545 -- 3,545 

 Sapling/seedling 4,741 -- -- -- 4,741 

 Nonstocked -- -- -- -- -- 

 Total 4,741 30,216 37,551 -- 72,507 

Engelmann spruce 

 Sawtimber 7,901 27,075 3,673 -- 38,650 

 Poletimber -- -- 

3,354 

-- 

 Sapling/seedling -- -- -- 3,354 

 Nonstocked -- -- -- -- -- 

 Total 7,901 27,075 7,027 -- 42,004 

Other western softwoods 

 Sawtimber -- -- -- 6,288 6,288 

 Poletimber -- -- -- 6,288 6,288 

 Sapling/seedling -- 6,321 4,716 -- 11,037 

 Nonstocked -- -- -- -- -- 

 Total -- 6,321 4,716 12,576 23,614 

Ponderosa pine 

 Sawtimber 6,288 279,514 474,259 6,288 766,349 

 Poletimber -- -- 50,734 -- 50,734 

 Sapling/seedling -- 11,809 22,058 -- 33,867 

 Nonstocked -- -- -- -- -- 

 Total 6,288 291,323 547,050 6,288 850,950 

Spruce-fir 

 Sawtimber -- -- 7,027 -- 7,027 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total -- -- 7,027 -- 7,027 

White fir 

 Sawtimber 4,716 7,803 -- -- 12,519 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- -- -- -- -- 

 Total 4,716 7,803 -- -- 12,519 

Nonstocked timberland 

 Sawtimber -- -- -- -- -- 

 Poletimber -- -- -- -- -- 

 Sapling/seedling -- -- -- -- -- 

 Nonstocked -- 6,075 18,250 -- 24,325 

 Total -- 6,075 18,250 -- 24,325 

All types 

 Sawtimber 20,486 389,354 523,495 12,576 945,911 

 Poletimber -- 12,458 54,279 6,288 73,025 

 Sapling/seedling 4,741 18,130 30,128 -- 52,999 

 Nonstocked -- 6,075 18,250 -- 24,325 

 Total 25,227 426,017 626,152 18,864 1,096,260 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 81 Table 48--Area of nonreserved timberland by stand volume and owner group, Arizona, 1999 Owner group National Other Nonindustrial Stand volume per acrea Forest public private Total - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - Less than 1,500 board feet 336,043 6,698 167,002 509,743 1,500 to 4,999 board feet 752,661 8,689 318,266 1,079,616 5,000 to 9,999 board feet 680,662 17,377 333,910 1,031,949 10,000 board feet or more 654,985 11,585 277,082 943,652 Total 2,424,352 44,349 1,096,260 3,564,961 aInternational -inch rule Table 49--Number of growing stock trees on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 7,801 1,941 610 154 267 115 187 -- 39 37 -- -- -- -- -- 11,152 Blue spruce 474 553 433 245 327 330 188 44 38 38 -- -- -- -- -- 2,670 Chihuahua pine 1,414 943 759 343 227 76 38 -- -- -- -- -- -- -- -- 3,800 Corkbark fir 5,441 2,823 1,367 830 635 360 283 282 85 -- 29 -- -- -- -- 12,135 Douglas-fir 43,805 24,323 13,267 8,935 6,575 3,728 2,723 1,759 1,173 744 392 331 347 81 686 108,869 Engelmann spruce 12,102 13,315 4,488 3,653 2,877 2,406 1,260 731 618 550 283 42 -- -- 38 42,363 Ponderosa pine 162,627 127,334 91,635 76,731 58,663 38,260 24,043 14,928 9,882 6,555 4,686 3,536 1,613 1,291 1,573 623,358 Southwestern white pine 4,082 969 1,888 1,791 954 517 658 352 44 66 59 67 44 37 44 11,572 Subalpine fir 367 -- 134 118 146 201 39 67 -- -- -- -- -- -- -- 1,072 White fir 24,568 9,350 5,391 4,293 2,996 2,098 1,227 832 836 347 395 113 73 237 52 52,808 Softwood total 262,680 181,552 119,973 97,093 73,667 48,090 30,646 18,995 12,715 8,338 5,845 4,090 2,078 1,646 2,392 869,798 Aspen 40,671 9,148 4,972 4,287 4,134 2,989 1,570 1,216 262 137 38 -- -- -- -- 69,422 Cottonwood -- 933 75 112 75 37 37 37 37 -- -- -- -- -- -- 1,345 Hardwood total 40,671 10,081 5,047 4,399 4,209 3,026 1,607 1,253 299 137 38 -- -- -- -- 70,767 All species 303,350 191,633 125,019 101,492 77,876 51,116 32,253 20,248 13,015 8,474 5,883 4,090 2,078 1,646 2,392 940,565 
82 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 50--Number of cull and hard dead trees on nonreserved timberland by owner group, 

and softwoods and hardwoods, Arizona, 1999 

 

Cull trees Hard dead 

Owner group 

Species 

group Rough Rotten Total trees Total 

 - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - 

National Forest Sofwoods 4,211 192 4,403 23,026 27,429 

 Hardwoods 546 687 1,233 10,315 11,548 

 Total 4,758 879 5,637 33,341 38,978 

Other public Softwoods -- -- -- -- -- 

 Hardwoods -- -- -- -- -- 

 Total -- -- -- -- -- 

Nonindustrial private Softwoods 1,325 -- 1,325 13,140 14,465 

 Hardwoods 322 494 816 8,482 9,298 

 Total 1,647 494 2,141 21,622 23,763 

 Total Softwoods 5,536 192 5,728 36,166 41,894 

 Hardwoods 868 1,181 2,049 18,797 20,846 

 Total 6,404 1,373 7,777 54,964 62,741 

Table 51--Net volume of growing stock on nonreserved timberland by forest type and 

 stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ All 

Forest type Sawtimber Poletimber seedling Nonstocked classes 

- - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - 

Aspen 159,274 77,652 1,770 -- 238,696 

Blue spruce 36,676 -- 243 -- 36,919 

Cottonwood 9,177 -- -- -- 9,177 

Douglas-fir 560,514 15,500 4,725 -- 580,739 

Engelmann spruce 302,117 7,988 397 -- 310,502 

Other western softwoods 59,048 963 6,225 -- 66,237 

Ponderosa pine 4,594,861 81,812 22,026 -- 4,698,699 

Spruce-fir 49,843 -- -- -- 49,843 

White fir 203,300 -- -- -- 203,300 

Nonstocked timberland -- -- -- 8,481 8,481 

 All types 5,974,809 183,916 35,387 8,481 6,202,593 

Table 52--Net volume of sawtimber (International -inch rule) on nonreserved timberland by 

 forest type and stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ 

Forest type Sawtimber Poletimber seedling Nonstocked 

All 

classes 

- - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - 

Aspen 655,618 233,869 6,566 -- 896,052 

Blue spruce 166,146 -- 673 -- 166,819 

Cottonwood 38,009 -- -- -- 38,009 

Douglas-fir 2,698,068 32,516 17,949 -- 2,748,533 

Engelmann spruce 1,520,019 14,361 -- -- 1,534,381 

Other western softwoods 276,313 1,897 29,184 -- 307,394 

Ponderosa pine 21,464,380 164,723 84,872 -- 21,713,975 

Spruce-fir 241,194 -- -- -- 241,194 

White fir 903,600 -- -- -- 903,600 

Nonstocked timberland -- -- -- 33,031 33,031 

 All types 27,963,347 447,366 139,244 33,031 28,582,988 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 83

Table 54--Net volume of growing stock on nonreserved timberland by species and 

 owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Arizona cypress 7,535 -- -- 7,535 

Blue spruce 1,390 -- 21,546 22,936 

Chihuahua pine 307 -- 3,662 3,969 

Corkbark fir 21,939 -- 26,159 48,098 

Douglas-fir 418,076 -- 193,461 611,537 

Engelmann spruce 132,575 -- 157,119 289,694 

Ponderosa pine 3,191,037 62,503 1,327,502 4,581,042 

Southwestern white pine 69,932 -- 15,372 85,304 

Subalpine fir 10,084 -- -- 10,084 

White fir 216,006 -- 47,171 263,177 

 Softwood total 4,068,881 62,503 1,791,993 5,923,378 

Aspen 125,628 -- 149,174 274,801 

Cottonwood 2,662 -- 1,752 4,414 

 Hardwood total 128,289 -- 150,926 279,215 

 All species 4,197,170 62,503 1,942,919 6,202,593 

Table 53--Net volume of sawtimber (Scribner rule) on nonreserved timberland by forest type and 

 stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ 

Forest type Sawtimber Poletimber seedling Nonstocked 

All 

classes 

- - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - 

Aspen 537,473 194,129 5,013 -- 736,615 

Blue spruce 131,856 -- 546 -- 132,402 

Cottonwood 32,237 -- -- -- 32,237 

Douglas-fir 2,352,537 26,052 13,757 -- 2,392,346 

Engelmann spruce 1,249,183 10,681 -- -- 1,259,865 

Other western softwoods 239,488 1,499 25,351 -- 266,338 

Ponderosa pine 18,868,530 134,937 75,305 -- 19,078,772 

Spruce-fir 194,185 -- -- -- 194,185 

White fir 780,019 -- -- -- 780,019 

Nonstocked timberland -- -- -- 29,028 29,028 

 All types 24,385,508 367,299 119,971 29,028 24,901,807 
84 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 55--Net volume of sawtimber (International -inch rule) on nonreserved 

 timberland by species and owner group, Arizona, 1999 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Arizona cypress 30,072 -- -- 30,072 

Blue spruce 5,654 -- 99,785 105,439 

Chihuahua pine -- -- 9,516 9,516 

Corkbark fir 100,409 -- 116,391 216,801 

Douglas-fir 2,040,551 -- 855,751 2,896,302 

Engelmann spruce 639,235 -- 766,296 1,405,530 

Ponderosa pine 14,738,144 321,686 6,283,574 21,343,404 

Southwestern white pine 314,744 -- 58,504 373,248 

Subalpine fir 47,741 -- -- 47,741 

White fir 934,108 -- 196,050 1,130,158 

 Softwood total 18,850,656 321,686 8,385,869 27,558,210 

Aspen 439,606 -- 568,412 1,008,018 

Cottonwood 10,808 -- 5,952 16,760 

 Hardwood total 450,414 -- 574,364 1,024,778 

 All species 19,301,070 321,686 8,960,233 28,582,988 

Table 56--Net volume of sawtimber (Scribner rule) on nonreserved timberland by 

 species and owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Arizona cypress 25,662 -- -- 25,662 

Blue spruce 4,397 -- 78,590 82,988 

Chihuahua pine -- -- 7,692 7,692 

Corkbark fir 79,938 -- 92,693 172,631 

Douglas-fir 1,765,686 -- 743,151 2,508,837 

Engelmann spruce 515,483 -- 619,396 1,134,879 

Ponderosa pine 12,975,289 284,198 5,547,773 18,807,260 

Southwestern white pine 275,863 -- 49,633 325,495 

Subalpine fir 37,268 -- -- 37,268 

White fir 807,500 -- 169,922 977,422 

 Softwood total 16,487,084 284,198 7,308,850 24,080,133 

Aspen 352,726 -- 454,885 807,611 

Cottonwood 8,924 -- 5,139 14,063 

 Hardwood total 361,651 -- 460,023 821,674 

 All species 16,848,735 284,198 7,768,874 24,901,807 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 85 Table 57--Net volume of growing stock on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 548 439 1,244 853 2,204 -- 825 1,422 -- -- -- -- -- 7,535 Blue spruce 968 1,568 3,495 6,295 4,676 1,372 1,859 2,703 -- -- -- -- -- 22,936 Chihuahua pine 821 823 1,081 565 680 -- -- -- -- -- -- -- -- 3,969 Corkbark fir 2,640 3,919 6,881 6,434 8,239 13,174 3,925 -- 2,886 -- -- -- -- 48,098 Douglas-fir 26,537 40,177 56,567 52,248 59,497 54,266 49,469 40,384 26,558 26,046 31,349 8,710 139,730 611,537 Engelmann spruce 8,099 20,019 31,725 43,367 36,842 28,383 36,853 42,312 30,383 6,062 -- -- 5,649 289,694 Ponderosa pine 158,813 327,278 470,145 507,609 484,622 430,821 405,413 358,302 378,731 351,757 196,510 181,965 329,076 4,581,042 Southwestern white pine 3,606 7,354 7,941 6,717 12,992 11,400 1,317 4,293 4,486 6,036 5,792 5,528 7,842 85,304 Subalpine fir 238 593 1,466 4,199 1,298 2,290 -- -- -- -- -- -- -- 10,084 White fir 9,750 18,328 23,654 27,445 24,792 24,750 34,202 18,383 25,558 10,549 7,830 31,377 6,560 263,177 Softwood total 212,020 420,497 604,199 655,732 635,841 566,457 533,863 467,799 468,602 400,451 241,481 227,579 488,857 5,923,378 Aspen 13,833 27,431 53,559 61,272 43,935 52,115 12,386 7,556 2,713 -- -- -- -- 274,801 Cottonwood 140 443 585 471 668 878 1,230 -- -- -- -- -- -- 4,414 Hardwood total 13,973 27,874 54,144 61,743 44,603 52,993 13,616 7,556 2,713 -- -- -- -- 279,215 All species 225,993 448,371 658,343 717,475 680,444 619,451 547,479 475,355 471,315 400,451 241,481 227,579 488,857 6,202,593 
86 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 58--Net volume of sawtimber (International -inch rule) on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 4,021 3,595 9,540 -- 4,655 8,260 -- -- -- -- -- 30,072 Blue spruce 14,583 31,128 25,508 7,765 10,736 15,719 -- -- -- -- -- 105,439 Chihuahua pine 3,699 2,358 3,459 -- -- -- -- -- -- -- -- 9,516 Corkbark fir 29,310 32,792 44,353 70,885 22,587 -- 16,874 -- -- -- -- 216,801 Douglas-fir 197,814 229,065 291,632 286,688 271,879 231,297 146,039 153,660 190,479 51,442 846,307 2,896,302 Engelmann spruce 136,849 220,671 202,205 157,861 208,083 243,364 167,857 35,474 -- -- 33,165 1,405,530 Ponderosa pine 1,579,035 2,162,255 2,340,029 2,233,888 2,192,675 2,019,174 2,279,741 2,153,797 1,211,762 1,129,663 2,041,386 21,343,404 Southwestern white pine 26,127 26,900 58,723 57,387 6,735 24,342 26,271 34,457 35,173 30,794 46,339 373,248 Subalpine fir 6,240 21,479 7,045 12,976 -- -- -- -- -- -- -- 47,741 White fir 75,353 110,969 111,559 117,869 171,253 94,464 132,096 57,646 43,758 178,160 37,032 1,130,158 Softwood total 2,073,032 2,841,212 3,094,053 2,945,320 2,888,602 2,636,620 2,768,877 2,435,034 1,481,172 1,390,058 3,004,229 27,558,210 Aspen (a) 316,667 250,823 305,863 75,626 43,925 15,114 -- -- -- -- 1,008,018 Cottonwood (a) 2,486 3,530 4,792 5,952 -- -- -- -- -- -- 16,760 Hardwood total (a) 319,153 254,354 310,654 81,578 43,925 15,114 -- -- -- -- 1,024,778 All species 2,073,032 3,160,365 3,348,407 3,255,974 2,970,181 2,680,545 2,783,991 2,435,034 1,481,172 1,390,058 3,004,229 28,582,988 aHardwoods are not considered sawtimber until they are 11 inches d.b.h.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 87 Table 59--Net volume of sawtimber (Scribner rule) on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 3,044 2,916 8,128 -- 4,141 7,433 -- -- -- -- -- 25,662 Blue spruce 10,517 23,826 20,260 6,304 8,907 13,174 -- -- -- -- -- 82,988 Chihuahua pine 2,796 1,939 2,956 -- -- -- -- -- -- -- -- 7,692 Corkbark fir 21,074 25,072 35,436 58,095 18,655 -- 14,299 -- -- -- -- 172,631 Douglas-fir 143,381 177,752 236,964 240,231 235,048 199,041 129,030 137,352 173,598 47,297 789,144 2,508,837 Engelmann spruce 98,473 169,191 161,360 128,401 172,719 204,013 142,007 30,135 -- -- 28,582 1,134,879 Ponderosa pine 1,194,317 1,758,444 1,985,788 1,950,841 1,952,153 1,823,132 2,073,278 1,977,390 1,120,829 1,050,881 1,920,208 18,807,260 Southwestern white pine 20,172 21,780 48,963 49,023 5,831 21,597 23,581 31,135 32,210 28,340 42,863 325,495 Subalpine fir 4,473 16,578 5,667 10,549 -- -- -- -- -- -- -- 37,268 White fir 54,810 87,118 91,631 100,055 149,513 83,788 119,145 52,515 40,320 164,210 34,316 977,422 Softwood total 1,553,057 2,284,616 2,597,153 2,543,499 2,546,966 2,352,178 2,501,340 2,228,527 1,366,957 1,290,728 2,815,113 24,080,133 Aspen (a) 243,386 200,775 250,409 63,067 37,122 12,852 -- -- -- -- 807,611 Cottonwood (a) 1,965 2,912 4,047 5,139 -- -- -- -- -- -- 14,063 Hardwood total (a) 245,351 203,687 254,456 68,206 37,122 12,852 -- -- -- -- 821,674 All species 1,553,057 2,529,967 2,800,841 2,797,955 2,615,172 2,389,300 2,514,192 2,228,527 1,366,957 1,290,728 2,815,113 24,901,807 aHardwoods are not considered sawtimber until they are 11 inches d.b.h.
88 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 60--Net volume of trees on nonreserved timberland by class of timber, and softwoods and hardwoods, Arizona, 1999 Class of timber Softwoods Hardwoods Total - - - - - - - - - - Thousand cubic feet - - - - - - - - - - Sawtimber trees Sawlog portion 4,715,776 137,285 4,853,061 Upper-stem portion 575,085 45,939 621,024 Total 5,290,861 183,224 5,474,085 Poletimber trees 632,516 95,991 728,507 All growing-stock trees 5,923,377 279,215 6,202,592 Rough cull trees 34,295 11,437 45,732 Rotten cull trees 1,654 4,150 5,804 Other live volume 211,917 350,470 562,388 Salvable dead trees 427,693 108,665 536,358 All timber 6,598,937 753,937 7,352,875 Table 61--Net volume of growing stock on nonreserved timberland by species and forest type , Arizona, 1999 Forest type Other Blue Engelmann western Ponderosa Nonstocked All Species Aspen spruce Cottonwood Douglas-fir spruce softwoods pine Spruce-fir White fir timberland types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- -- -- -- 6,712 822 -- -- -- 7,535 Blue spruce 69 22,867 -- -- -- -- -- -- -- -- 22,936 Chihuahua pine -- -- -- -- -- 1,820 2,149 -- -- -- 3,969 Corkbark fir 2,965 -- -- 10,616 8,624 4,316 778 20,800 -- -- 48,098 Douglas-fir 16,902 2,189 -- 364,816 52,154 7,025 133,662 2,228 32,561 -- 611,537 Engelmann spruce 10,481 -- -- 20,812 194,673 352 40,607 16,206 6,564 -- 289,694 Ponderosa pine 34,821 3,660 4,763 78,876 19,643 1,714 4,413,296 -- 15,788 8,481 4,581,042 Southwestern white pine 2,217 1,078 -- 15,205 1,482 37,886 22,499 131 4,806 -- 85,304 Subalpine fir -- -- -- -- 3,466 -- 2,224 4,394 -- -- 10,084 White fir 11,382 821 -- 64,881 1,026 270 49,600 1,395 133,804 -- 263,177 Softwood total 78,835 30,615 4,763 555,206 281,068 60,095 4,665,638 45,153 193,523 8,481 5,923,378 Aspen 159,861 6,304 -- 25,533 29,434 6,142 33,061 4,689 9,776 -- 274,801 Cottonwood -- -- 4,414 -- -- -- -- -- -- -- 4,414 Hardwood total 159,861 6,304 4,414 25,533 29,434 6,142 33,061 4,689 9,776 -- 279,215 All species 238,696 36,919 9,177 580,739 310,502 66,237 4,698,699 49,843 203,300 8,481 6,202,593 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 89 Table 62--Net volume of sawtimber (International -inch rule) on nonreserved timberland by species and forest type , Arizona, 1999 Forest type Other Blue Engelmann western Ponderosa Nonstocked All Species Aspen spruce Cottonwood Douglas-fir spruce softwoods pine Spruce-fir White fir timberland types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- -- -- -- 27,030 3,041 -- -- -- 30,072 Blue spruce -- 105,439 -- -- -- -- -- -- -- -- 105,439 Chihuahua pine -- -- -- -- -- 3,942 5,574 -- -- -- 9,516 Corkbark fir 10,174 -- -- 51,449 29,850 18,965 4,146 102,217 -- -- 216,801 Douglas-fir 69,377 6,740 -- 1,797,416 264,008 28,345 579,981 12,154 138,281 -- 2,896,302 Engelmann spruce 38,327 -- -- 93,147 962,697 1,596 192,449 83,841 33,473 -- 1,405,530 Ponderosa pine 177,828 14,660 21,249 364,664 100,935 2,424 20,541,557 -- 87,055 33,031 21,343,404 Southwestern white pine 6,065 3,376 -- 52,544 5,554 193,901 87,125 -- 24,683 -- 373,248 Subalpine fir -- -- -- -- 17,157 -- 11,237 19,346 -- -- 47,741 White fir 44,476 -- -- 302,984 2,517 546 169,520 3,938 606,177 -- 1,130,158 Softwood total 346,247 130,215 21,249 2,662,204 1,382,718 276,749 21,594,630 221,497 889,669 33,031 27,558,210 Aspen 549,805 36,604 -- 86,329 151,663 30,645 119,345 19,697 13,931 -- 1,008,018 Cottonwood -- -- 16,760 -- -- -- -- -- -- -- 16,760 Hardwood total 549,805 36,604 16,760 86,329 151,663 30,645 119,345 19,697 13,931 -- 1,024,778 All species 896,052 166,819 38,009 2,748,533 1,534,381 307,394 21,713,975 241,194 903,600 33,031 28,582,988 Table 63--Net volume of sawtimber (Scribner rule) on nonreserved timberland by species and forest type, Arizona, 1999 Forest type Other Blue Engelmann western Ponderosa Nonstocked All Species Aspen spruce Cottonwood Douglas-fir spruce softwoods pine Spruce-fir White fir timberland types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- -- -- -- 23,039 2,623 -- -- -- 25,662 Blue spruce -- 82,988 -- -- -- -- -- -- -- -- 82,988 Chihuahua pine -- -- -- -- -- 3,116 4,576 -- -- -- 7,692 Corkbark fir 7,499 -- -- 41,598 23,213 15,067 3,231 82,024 -- -- 172,631 Douglas-fir 56,315 5,017 -- 1,582,408 226,492 23,103 491,879 10,799 112,822 -- 2,508,837 Engelmann spruce 30,297 -- -- 74,010 777,820 1,199 156,565 67,505 27,484 -- 1,134,879 Ponderosa pine 158,771 12,158 18,174 317,344 89,878 1,901 18,101,025 -- 78,982 29,028 18,807,260 Southwestern white pine 4,916 2,787 -- 43,676 4,635 173,656 74,114 -- 21,710 -- 325,495 Subalpine fir -- -- -- -- 13,426 -- 8,668 15,173 -- -- 37,268 White fir 37,434 -- -- 265,309 1,877 374 141,199 3,114 528,115 -- 977,422 Softwood total 295,233 102,949 18,174 2,324,346 1,137,340 241,455 18,983,880 178,615 769,112 29,028 24,080,133 Aspen 441,383 29,453 -- 68,000 122,524 24,884 94,892 15,570 10,906 -- 807,611 Cottonwood -- -- 14,063 -- -- -- -- -- -- -- 14,063 Hardwood total 441,383 29,453 14,063 68,000 122,524 24,884 94,892 15,570 10,906 -- 821,674 All species 736,615 132,402 32,237 2,392,346 1,259,865 266,338 19,078,772 194,185 780,019 29,028 24,901,807 
90 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 64--Net annual growth of growing stock on nonreserved timberland by 

 species and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

 - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Arizona cypress 127 -- -- 127 

Blue spruce 59 -- 682 742 

Chihuahua pine 9 -- 91 100 

Corkbark fir 713 -- 256 969 

Douglas-fir 5,298 -- 5,334 10,632 

Engelmann spruce 791 -- 1,647 2,438 

Ponderosa pine 69,254 1,867 28,478 99,599 

Southwestern white pine 1,446 -- 470 1,916 

Subalpine fir 201 -- -- 201 

White fir 3,259 -- 1,301 4,561 

 Softwood total 81,159 1,867 38,258 121,284 

Aspen 1,340 -- 1,782 3,123 

Cottonwood 88 -- 121 209 

 Hardwood total 1,428 -- 1,904 3,332 

 All species 82,587 1,867 40,162 124,616 

Table 65--Net annual growth of sawtimber (International -inch rule) on 

 nonreserved timberland by species and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Arizona cypress 402 -- -- 402 

Blue spruce 207 -- 4,959 5,166 

Chihuahua pine -- -- 547 547 

Corkbark fir 3,201 -- 1,691 4,892 

Douglas-fir 20,857 -- 25,843 46,700 

Engelmann spruce 5,237 -- 10,478 15,715 

Ponderosa pine 370,256 10,388 153,505 534,149 

Southwestern white pine 5,382 -- 1,884 7,266 

Subalpine fir 2,236 -- -- 2,236 

White fir 13,782 -- 5,925 19,707 

 Softwood total 421,560 10,388 204,833 636,781 

Aspen 9,577 -- 14,308 23,885 

Cottonwood 273 -- 189 462 

 Hardwood total 9,850 -- 14,497 24,347 

 All species 431,410 10,388 219,330 661,129 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 91 Table 66--Net annual growth of sawtimber (Scribner rule) on nonreserved timberland by species and owner group, Arizona, 1998 Owner group National Other Nonindustrial Species Forest public private Total - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - Arizona cypress 362 -- -- 362 Blue spruce 168 -- 3,919 4,086 Chihuahua pine -- -- 432 432 Corkbark fir 2,494 -- 1,408 3,902 Douglas-fir 17,234 -- 21,780 39,014 Engelmann spruce 3,825 -- 8,567 12,392 Ponderosa pine 322,380 9,446 135,461 467,286 Southwestern white pine 4,803 -- 1,685 6,488 Subalpine fir 1,907 -- -- 1,907 White fir 11,954 -- 5,119 17,073 Softwood total 365,126 9,446 178,371 552,943 Aspen 8,097 -- 11,766 19,863 Cottonwood 247 -- 171 418 Hardwood total 8,344 -- 11,937 20,281 All species 373,470 9,446 190,308 573,224 Table 67--Net annual growth of growing stock on nonreserved timberland by species and diameter class, Arizona, 1998 Diameter class (inches at breast height) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 52 8 18 11 21 -- 9 8 -- -- -- -- -- 127 Blue spruce 54 34 169 228 92 44 54 67 -- -- -- -- -- 742 Chihuahua pine 31 23 23 14 10 -- -- -- -- -- -- -- -- 100 Corkbark fir 439 116 36 104 -54 240 25 -- 62 -- -- -- -- 969 Douglas-fir 2,555 1,542 2,199 1,459 1,580 919 1,076 736 -602 -499 314 28 -675 10,632 Engelmann spruce 786 716 648 643 617 -190 184 -590 442 -852 -- -- 35 2,438 Ponderosa pine 13,501 12,063 15,389 14,173 11,166 8,721 7,116 4,771 4,663 3,719 828 1,587 1,901 99,599 Southwestern white pine 395 295 237 108 348 156 12 33 44 127 47 37 77 1,916 Subalpine fir -45 -93 -24 229 77 58 -- -- -- -- -- -- -- 201 White fir 633 635 713 890 156 560 763 311 438 103 89 274 -1,005 4,561 Softwood total 18,401 15,337 19,407 17,858 14,013 10,509 9,240 5,336 5,048 2,598 1,278 1,925 333 121,284 Aspen 470 197 383 667 456 497 233 133 87 -- -- -- -- 3,123 Cottonwood 52 39 32 10 12 27 38 -- -- -- -- -- -- 209 Hardwood total 522 235 415 677 467 524 271 133 87 -- -- -- -- 3,332 All species 18,923 15,573 19,822 18,536 14,481 11,032 9,511 5,469 5,135 2,598 1,278 1,925 333 124,616 
92 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 68--Net annual growth of sawtimber (International -inch rule) on nonreserved timberland by species and diameter class, Arizona, 1998 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 99 68 120 -- 61 54 -- -- -- -- -- 402 Blue spruce 2,273 1,353 561 264 321 395 -- -- -- -- -- 5,166 Chihuahua pine 406 80 61 -- -- -- -- -- -- -- -- 547 Corkbark fir 2,492 778 -244 1,349 150 -- 368 -- -- -- -- 4,892 Douglas-fir 20,027 8,857 9,610 5,741 6,563 4,604 -3,577 -2,982 2,005 177 -4,327 46,700 Engelmann spruce 12,926 4,498 3,848 -973 1,121 -3,397 2,467 -4,981 -- -- 207 15,715 Ponderosa pine 171,109 83,405 68,226 53,529 43,996 30,275 30,653 24,503 5,587 10,425 12,440 534,149 Southwestern white pine 1,284 706 2,000 937 74 210 279 778 302 216 481 7,266 Subalpine fir 61 1,375 450 350 -- -- -- -- -- -- -- 2,236 White fir 5,299 4,681 1,011 3,112 4,230 1,744 2,442 604 523 1,642 -5,581 19,707 Softwood total 215,976 105,802 85,642 64,309 56,515 33,885 32,632 17,922 8,419 12,460 3,220 636,781 Aspen (a) 14,639 3,161 3,268 1,513 806 497 -- -- -- -- 23,885 Cottonwood (a) 56 66 151 189 -- -- -- -- -- -- 462 Hardwood total (a) 14,696 3,227 3,419 1,702 806 497 -- -- -- -- 24,347 All species 215,976 120,498 88,869 67,728 58,217 34,691 33,130 17,922 8,419 12,460 3,220 661,129 aHardwoods are not considered sawtimber until they are 11 inches d.b.h. Table 69--Net annual growth of sawtimber (Scribner rule) on nonreserved timberland by species and diameter class, Arizona, 1998 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 84 61 110 -- 57 50 -- -- -- -- -- 362 Blue spruce 1,651 1,118 474 226 276 341 -- -- -- -- -- 4,086 Chihuahua pine 305 71 56 -- -- -- -- -- -- -- -- 432 Corkbark fir 1,770 685 -159 1,158 130 -- 319 -- -- -- -- 3,902 Douglas-fir 15,075 7,529 8,474 5,170 6,006 4,149 -2,944 -2,670 1,903 169 -3,847 39,014 Engelmann spruce 9,419 3,902 3,331 -680 1,045 -2,726 2,142 -4,222 -- -- 181 12,392 Ponderosa pine 132,064 73,910 62,265 49,544 41,044 28,598 29,079 23,285 5,557 9,976 11,965 467,286 Southwestern white pine 1,053 624 1,761 845 68 195 261 730 287 205 459 6,488 Subalpine fir 84 1,141 383 299 -- -- -- -- -- -- -- 1,907 White fir 4,107 3,997 964 2,813 3,894 1,621 2,299 576 499 1,566 -5,263 17,073 Softwood total 165,612 93,038 77,658 59,375 52,519 32,229 31,156 17,699 8,246 11,917 3,496 552,943 Aspen (a) 11,612 2,845 2,928 1,335 706 436 -- -- -- -- 19,863 Cottonwood (a) 51 60 136 171 -- -- -- -- -- -- 418 Hardwood total (a) 11,663 2,905 3,064 1,506 706 436 -- -- -- -- 20,281 All species 165,612 104,700 80,563 62,439 54,025 32,935 31,592 17,699 8,246 11,917 3,496 573,224 aHardwoods are not considered sawtimber until they are 11 inches d.b.h.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 93

Table 70--Annual mortality of growing stock on nonreserved timberland by species 

 and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Arizona cypress -- -- -- -- 

Blue spruce -- -- 39 39 

Chihuahua pine -- -- -- -- 

Corkbark fir 180 -- 367 547 

Douglas-fir 4,289 -- 38 4,327 

Engelmann spruce 2,836 -- 1,829 4,665 

Ponderosa pine 3,892 -- 2,071 5,963 

Southwestern white pine -- -- 161 161 

Subalpine fir 291 -- -- 291 

White fir 1,601 -- 71 1,672 

 Softwood total 13,090 -- 4,576 17,666 

Aspen 1,763 -- 1,592 3,355 

Cottonwood -- -- -- -- 

 Hardwood total 1,763 -- 1,592 3,355 

 All species 14,853 -- 6,168 21,021 

Table 71--Annual mortality of sawtimber (International -inch rule) on 

 nonreserved timberland by species and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Arizona cypress -- -- -- -- 

Blue spruce -- -- -- -- 

Chihuahua pine -- -- -- -- 

Corkbark fir 876 -- 1,384 2,260 

Douglas-fir 23,932 -- 126 24,058 

Engelmann spruce 15,499 -- 8,441 23,940 

Ponderosa pine 14,490 -- 8,427 22,917 

Southwestern white pine -- -- 418 418 

Subalpine fir 472 -- -- 472 

White fir 7,923 -- 109 8,032 

 Softwood total 63,193 -- 18,905 82,098 

Aspen 2,453 -- 6,289 8,742 

Cottonwood -- -- -- -- 

 Hardwood total 2,453 -- 6,289 8,742 

 All species 65,646 -- 25,194 90,841 
94 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 73--Annual mortality of growing stock on nonreserved timberland by species and diameter class, Arizona, 1998 Diameter class (inches at breast height) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- -- -- -- -- -- -- -- -- -- -- -- -- Blue spruce 16 23 -- -- -- -- -- -- -- -- -- -- -- 39 Chihuahua pine -- -- -- -- -- -- -- -- -- -- -- -- -- -- Corkbark fir 14 86 173 115 159 -- -- -- -- -- -- -- -- 547 Douglas-fir 115 182 38 161 134 193 -- -- 1,044 818 -- -- 1,642 4,327 Engelmann spruce 133 222 417 528 223 687 371 1,163 -- 921 -- -- -- 4,665 Ponderosa pine 617 1,160 480 384 643 344 -- 790 379 -- 1,166 -- -- 5,963 Southwestern white pine 21 44 -- 96 -- -- -- -- -- -- -- -- -- 161 Subalpine fir 64 116 111 -- -- -- -- -- -- -- -- -- -- 291 White fir 38 101 118 -- 372 -- -- -- -- -- -- -- 1,043 1,672 Softwood total 1,018 1,934 1,336 1,284 1,532 1,224 371 1,954 1,423 1,738 1,166 -- 2,685 17,666 Aspen 341 646 875 705 383 321 84 -- -- -- -- -- -- 3,355 Cottonwood -- -- -- -- -- -- -- -- -- -- -- -- -- -- Hardwood total 341 646 875 705 383 321 84 -- -- -- -- -- -- 3,355 All species 1,360 2,581 2,211 1,989 1,915 1,544 455 1,954 1,423 1,738 1,166 -- 2,685 21,021 Table 72--Annual mortality of sawtimber (Scribner rule) on nonreserved timberland by species and owner group, Arizona, 1998 Owner group National Other Nonindustrial Species Forest public private Total - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - Arizona cypress -- -- -- -- Blue spruce -- -- -- - Chihuahua pine -- -- -- -- Corkbark fir 696 -- 1,028 1,724 Douglas-fir 21,451 -- 90 21,541 Engelmann spruce 12,803 -- 6,706 19,509 Ponderosa pine 12,573 -- 7,671 20,244 Southwestern white pine -- -- 339 339 Subalpine fir 336 -- -- 336 White fir 7,243 -- 76 7,319 Softwood total 55,102 -- 15,909 71,011 Aspen 1,924 -- 4,983 6,908 Cottonwood -- -- -- -- Hardwood total 1,924 -- 4,983 6,908 All species 57,027 -- 20,892 77,919 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 95 Table 75--Annual mortality of sawtimber (Scribner rule) on nonreserved timberland by species and diameter class, Arizona, 1998 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- -- -- -- -- -- -- -- -- -- Blue spruce -- -- -- -- -- -- -- -- -- -- -- Chihuahua pine -- -- -- -- -- -- -- -- -- -- -- Corkbark fir 600 428 696 -- -- -- -- -- -- -- 1,724 Douglas-fir 90 505 491 903 -- -- 5,403 4,526 -- 9,622 21,541 Engelmann spruce 1,354 2,030 968 3,195 1,761 5,627 -- 4,574 -- -- 19,509 Ponderosa pine 1,243 1,440 2,719 1,635 -- 4,176 2,122 -- 6,910 -- 20,244 Southwestern white pine -- 339 -- -- -- -- -- -- -- -- 339 Subalpine fir 336 -- -- -- -- -- -- -- -- -- 336 White fir 247 -- 1,586 -- -- -- -- -- -- 5,486 7,319 Softwood total 3,869 4,741 6,460 5,733 1,761 9,803 7,525 9,100 6,910 15,108 71,011 Aspen (a) 2,982 1,830 1,641 454 -- -- -- -- -- 6,908 Cottonwood (a) -- -- -- -- -- -- -- -- -- -- Hardwood total (a) 2,982 1,830 1,641 454 -- -- -- -- -- 6,908 All species 3,869 7,724 8,290 7,374 2,215 9,803 7,525 9,100 6,910 15,108 77,919 aHardwoods are not considered sawtimber until they are 11 inches d.b.h. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Table 74--Annual mortality of sawtimber (International -inch rule) on nonreserved timberland by species and diameter class, Arizona, 1998 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- -- -- -- -- -- -- -- -- -- -- Blue spruce -- -- -- -- -- -- -- -- -- -- -- -- Chihuahua pine -- -- -- -- -- -- -- -- -- -- -- -- Corkbark fir 815 569 876 -- -- -- -- -- -- -- -- 2,260 Douglas-fir 126 665 646 1,063 -- -- 6,228 4,993 -- -- 10,336 24,058 Engelmann spruce 1,869 2,672 1,222 3,912 2,133 6,746 -- 5,386 -- -- -- 23,940 Ponderosa pine 1,648 1,751 3,205 1,866 -- 4,626 2,341 -- 7,480 -- -- 22,917 Southwestern white pine -- 418 -- -- -- -- -- -- -- -- -- 418 Subalpine fir 472 -- -- -- -- -- -- -- -- -- -- 472 White fir 347 -- 1,872 -- -- -- -- -- -- -- 5,813 8,032 Softwood total 5,276 6,077 7,822 6,841 2,133 11,372 8,570 10,378 7,480 -- 16,149 82,098 Aspen (a) 3,899 2,295 2,006 542 -- -- -- -- -- -- 8,742 Cottonwood (a) -- -- -- -- -- -- -- -- -- -- -- Hardwood total (a) 3,899 2,295 2,006 542 -- -- -- -- -- -- 8,742 All species 5,276 9,976 10,117 8,847 2,675 11,372 8,570 10,378 7,480 -- 16,149 90,841 aHardwoods are not considered sawtimber until they are 11 inches d.b.h.
96 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 76--Annual mortality of growing stock on nonreserved timberland by species and cause of death, Arizona, 1998 

 

 Cause of death 

Species Insects Disease Fire Animal Weather Suppression Unknown Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Arizona cypress -- -- -- -- -- -- -- -- 

Blue spruce -- -- -- -- -- 39 -- 39 

Chihuahua pine -- -- -- -- -- -- -- -- 

Corkbark fir 285 183 -- 79 -- -- -- 547 

Douglas-fir 3,315 686 103 -- 223 -- -- 4,327 

Engelmann spruce -- 4,568 58 22 -- 16 -- 4,665 

Ponderosa pine 1,268 1,695 135 -- 2,353 310 203 5,963 

Southwestern white pine -- -- 96 64 -- -- -- 161 

Subalpine fir -- 65 226 -- -- -- -- 291 

White fir 40 1,601 -- 31 -- -- -- 1,672 

 Softwood total 4,908 8,798 619 196 2,576 365 203 17,666 

Aspen 63 2,687 55 -- 384 101 65 3,355 

Cottonwood -- -- -- -- -- -- -- -- 

 Hardwood total 63 2,687 55 -- 384 101 65 3,355 

 All species 4,971 11,485 674 196 2,960 467 268 21,021 

Table 77--Annual mortality of sawtimber (International -inch rule) on nonreserved timberland by species and 

 cause of death, Arizona, 1998 

 

 Cause of death 

Species Insects Disease Fire Weather Suppression Unknown Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - 

Arizona cypress -- -- -- -- -- -- -- 

Blue spruce -- -- -- -- -- -- -- 

Chihuahua pine -- -- -- -- -- -- -- 

Corkbark fir 1,478 782 -- -- -- -- 2,260 

Douglas-fir 20,257 3,136 -- 665 -- -- 24,058 

Engelmann spruce -- 23,940 -- -- -- -- 23,940 

Ponderosa pine 4,381 5,495 -- 12,106 287 648 22,917 

Southwestern white pine -- -- 418 -- -- -- 418 

Subalpine fir -- 286 186 -- -- -- 472 

White fir 109 7,923 -- -- -- -- 8,032 

 Softwood total 26,225 41,562 604 12,771 287 648 82,098 

Aspen -- 7,328 -- 1,414 -- -- 8,742 

Cottonwood -- -- -- -- -- -- -- 

 Hardwood total -- 7,328 -- 1,414 -- -- 8,742 

 All species 26,225 48,890 604 14,186 287 648 90,841 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 97

Table 78--Annual mortality of sawtimber (Scribner rule) on nonreserved timberland by species and cause of 

 death, Arizona, 1998 

 

 Cause of death 

Species Insects Disease Fire Weather Suppression Unknown Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - -- - - - - - - - - - - - - - 

Arizona cypress -- -- -- -- -- -- -- 

Blue spruce -- -- -- -- -- -- -- 

Chihuahua pine -- -- -- -- -- -- -- 

Corkbark fir 1,142 581 -- -- -- -- 1,724 

Douglas-fir 18,495 2,541 -- 505 -- -- 21,541 

Engelmann spruce -- 19,509 -- -- -- -- 19,509 

Ponderosa pine 3,834 4,574 -- 11,086 209 541 20,244 

Southwestern white pine -- -- 339 -- -- -- 339 

Subalpine fir -- 205 131 -- -- -- 336 

White fir 76 7,243 -- -- -- -- 7,319 

 Softwood total 23,547 34,653 470 11,591 209 541 71,011 

Aspen -- 5,824 -- 1,084 -- -- 6,908 

Cottonwood -- -- -- -- -- -- -- 

 Hardwood total -- 5,824 -- 1,084 -- -- 6,908 

 All species 23,547 40,477 470 12,675 209 541 77,919 

Table 79--Removals from nonreserved timberland by species and product, Arizona, 1998 

 

 Product 

 Other Logging All 

Species Sawlogs Pulpwood products Fuelwood residue products 

- - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - 

Ponderosa pine 11,588 3,364 54 73 651 15,730 

Douglas-fir 804 417 0 514 75 1,810 

Spruce 154 409 44 0 26 633 

True firs 199 5 0 0 9 213 

Other species 189 5 0 84 12 290 

 Total species 12,934 4,200 98 671 773 18,677 

- - - - - - - - - Thousand board feet, International -inch rule - - - - - - - - - 

Ponderosa pine 62,482 13,424 250 251 1,429 77,836 

Douglas-fir 4,338 1,663 0 1,758 145 7,904 

Spruce 830 1,630 206 0 50 2,716 

True firs 1,075 21 0 0 20 1,117 

Other species 1,017 21 0 288 25 1,351 

 Total species 69,743 16,758 456 2,297 1,669 90,923 

- - - - - - - - - - - - - Thousand board feet, Scribner rule - - - - - - - - - - - - - - 

Ponderosa pine 54,809 11,775 220 220 1,253 68,277 

Douglas-fir 3,805 1,459 0 1,542 127 6,933 

Spruce 728 1,430 181 0 44 2,384 

True firs 943 18 0 0 18 979 

Other species 892 18 0 253 22 1,185 

 Total species 61,178 14,700 400 2,015 1,464 79,757 

 

 aOther products includes house logs and posts & poles. 
98 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 80--Removals from nonreserved timberland by species and 

 owner group, Arizona, 1998. 

 

 Owner group 

 National Total All 

Species Forest other owners owners 

- - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - 

Ponderosa pine 6,037 9,694 15,730 

Douglas-fir 1,129 681 1,810 

Spruce 339 294 633 

True firs 21 193 213 

Other species 97 193 290 

 Total species 7,623 11,054 18,677 

- - Thousand board feet, International -inch rule - - 

Ponderosa pine 28,683 49,153 77,836 

Douglas-fir 4,548 3,355 7,904 

Spruce 1,433 1,284 2,717 

True firs 101 1,015 1,116 

Other species 336 1,015 1,351 

 Total species 35,101 55,822 90,923 

- - - - - - - Thousand board feet, Scriber rule - - - - - - - - 

Ponderosa pine 25,160 43,116 68,277 

Douglas-fir 3,990 2,943 6,933 

Spruce 1,257 1,127 2,384 

True firs 89 890 979 

Other species 294 890 1,185 

 Total species 30,790 48,967 79,757 

 

Table 81--Removals from nonreserved timberland by product type and 

 owner group, Arizona, 1998. 

 

 Owner group 

 National Total All 

Product Forest other owners owners 

- - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - 

Sawlogs 4,049 8,885 12,934 

Pulpwood 2,589 1,611 4,200 

Other productsa

 -- 98 98 

 Total products 6,637 10,595 17,232 

Fuelwood 672 -- 672 

Logging residue 316 458 773 

 Total removals 7,625 11,053 18,677 

- - Thousand board feet, International -inch rule - - 

Sawlogs 21,831 47,912 69,743 

Pulpwood 10,328 6,430 16,758 

Other productsa

 -- 456 456 

 Total products 32,159 54,798 86,957 

Fuelwood 2,297 -- 2,297 

Logging residue 644 1,025 1,669 

 Total removals 35,101 55,822 90,923 

- - - - - - - Thousand board feet, Scribner rule - - - - - - - 

Sawlogs 19,150 42,028 61,178 

Pulpwood 9,060 5,640 14,700 

Other productsa

 -- 400 400 

 Total products 28,210 48,068 76,278 

Fuelwood 2,015 -- 2,015 

Logging residue 565 899 1,464 

 Total removals 30,790 48,967 79,757 

 

 aOther products includes house logs and posts & poles.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 99

Table 82--Area of nonreserved woodland by forest type and owner group, 

 Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - 

Deciduous woodland oak 107,344 24,264 151,234 282,842 

Evergreen oak 851,275 64,895 488,601 1,404,771 

Juniper 891,547 695,470 1,405,962 2,992,979 

Mesquite 211,887 485,020 641,343 1,338,250 

Misc. western hardwoods 19,436 63,769 29,229 112,434 

Pinyon-juniper 2,160,293 971,193 3,851,204 6,982,690 

Nonstocked woodland 554,383 95,563 279,819 929,764 

 All types 4,796,165 2,400,174 6,847,391 14,043,730 

Nonreserved Woodland
100 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 83--Number of live trees on nonreserved woodland by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 63,293 38,575 25,025 17,962 12,839 9,461 6,534 4,901 3,016 1,979 1,345 887 1,228 769 1,778 189,590 Apache pine 486 486 39 39 117 39 -- -- -- 39 -- -- -- -- -- 1,245 Arizona cypress -- -- -- 112 35 -- -- -- -- -- -- -- -- -- -- 147 Arizona pinyon pinea 17,945 5,670 5,755 3,532 2,054 1,400 784 245 112 40 32 -- -- -- -- 37,571 Border pinyona 11,525 5,684 5,133 3,659 1,426 545 302 116 80 39 -- -- -- -- -- 28,509 California juniper a 898 898 349 267 289 239 -- -- -- -- -- -- -- -- -- 2,941 Chihuahua pine -- -- 232 188 76 76 -- -- -- -- -- -- -- -- -- 572 Douglas-fir 2,818 471 1,049 838 449 263 78 114 39 -- -- -- 41 38 -- 6,197 Mexican pinyon pinea 1,439 944 769 425 114 -- 39 38 -- -- -- -- -- -- -- 3,768 Oneseed juniper a 46,432 24,616 27,810 24,407 23,243 22,065 16,515 16,256 10,759 9,378 7,303 4,203 3,234 1,924 4,017 242,160 Ponderosa pine 27,485 14,410 12,071 7,452 4,617 3,663 2,549 1,494 999 788 332 283 144 139 37 76,463 Redberry juniper a 465 -- 268 325 150 449 301 298 150 -- -- 37 30 39 37 2,550 Rocky Mountain juniper a 13,529 9,479 2,914 2,253 1,099 982 862 630 595 304 144 185 76 -- 310 33,363 Singleleaf pinyona 6,222 3,400 2,937 2,384 1,346 1,001 402 171 73 -- 41 -- -- -- -- 17,975 Southwestern white pine -- -- 37 75 39 -- -- -- -- -- -- -- -- -- -- 151 Twoneedle pinyona 275,019 145,941 105,028 74,123 47,527 30,554 15,551 7,405 3,416 2,224 899 242 313 -- -- 708,241 Utah juniper a 117,209 59,191 62,422 50,187 41,790 31,334 23,796 20,078 15,254 13,067 8,769 5,110 4,094 2,862 3,976 459,141 White fir -- -- -- -- 38 38 -- -- -- -- -- -- -- -- -- 76 Softwood total 584,766 309,766 251,839 188,231 137,248 102,107 67,713 51,747 34,493 27,858 18,864 10,947 9,159 5,770 10,154 1,810,662 Arizona white oaka 68,460 36,322 33,649 26,791 17,787 11,068 7,092 4,178 2,447 1,704 816 486 266 -- 199 211,263 Aspen 511 474 193 79 -- -- -- -- -- -- -- -- -- -- -- 1,257 Bigtooth maplea 961 505 150 118 41 35 156 -- -- -- -- -- -- -- -- 1,965 Cottonwood -- -- -- -- 37 -- -- -- -- -- -- -- -- -- -- 37 Desert ironwooda 859 3,109 640 429 270 74 68 123 184 -- -- -- -- 57 -- 5,812 Emory oaka 40,962 19,381 18,970 16,926 11,007 5,955 3,985 1,671 1,400 451 308 106 64 33 -- 121,220 Gambel oaka 278,304 48,540 33,754 13,506 4,066 1,732 734 265 299 178 33 210 147 81 33 381,883 Mesquitea 59,918 18,783 14,552 9,982 6,310 3,278 1,723 998 491 115 -- -- -- -- -- 116,150 Mexican blue oaka -- -- 867 1,246 738 1,288 952 147 109 182 109 72 74 35 -- 5,821 New Mexico locusta 25,177 1,932 257 44 -- -- -- -- -- -- -- -- -- -- -- 27,410 Oak--evergreena 15,666 6,813 4,168 1,633 1,775 744 375 -- 280 -- -- -- -- -- -- 31,454 Rocky Mountain maplea -- -- 135 -- -- -- -- -- -- -- -- -- -- -- -- 135 Silverleaf oaka 26,095 9,572 5,154 3,295 2,064 912 342 419 203 74 76 -- 76 -- -- 48,281 Velvet mesquitea 13,551 3,713 5,579 3,715 2,389 952 586 295 257 208 74 -- -- 37 -- 31,358 W. honey mesquitea 8,952 8,813 2,829 1,886 1,560 425 225 74 74 -- -- -- -- -- 74 24,911 Hardwood total 539,417 157,957 120,897 79,650 48,043 26,463 16,238 8,169 5,744 2,913 1,416 875 627 244 306 1,008,959 All species 1,124,183 467,723 372,737 267,881 185,291 128,570 83,952 59,916 40,236 30,771 20,280 11,821 9,787 6,014 10,460 2,819,621 aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 101

Table 84--Net volume of all live trees on nonreserved woodland by forest type and 

 owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Deciduous woodland oak 122,645 22,596 150,326 295,566 

Evergreen oak 482,622 10,086 316,638 809,346 

Juniper 403,493 278,635 589,443 1,271,570 

Mesquite 40,936 46,704 67,844 155,484 

Misc. western hardwoods 1,875 3,074 1,927 6,876 

Pinyon-juniper 1,532,627 444,943 2,569,884 4,547,455 

Nonstocked woodland 22,457 1,895 9,465 33,817 

 All types 2,606,656 807,933 3,705,526 7,120,114 
102 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 85--Net volume of all live trees on nonreserved woodland by species and diameter class, Arizona, 1999 Diameter class(inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 20,682 32,513 43,908 52,632 55,059 58,513 51,141 43,881 37,566 31,184 51,843 37,154 148,172 664,248 Apache pine 53 107 805 408 -- -- -- 1,806 -- -- -- -- -- 3,178 Arizona cypress -- 194 94 -- -- -- -- -- -- -- -- -- -- 288 Arizona pinyon pinea 8,511 12,202 13,227 15,636 12,092 5,111 3,115 1,777 960 -- -- -- -- 72,631 Border pinyona 5,684 9,208 8,069 5,134 3,582 1,851 1,698 983 -- -- -- -- -- 36,210 California juniper a 181 477 527 623 -- -- -- -- -- -- -- -- -- 1,809 Chihuahua pine 345 475 535 629 -- -- -- -- -- -- -- -- -- 1,984 Douglas-fir 2,086 3,353 3,417 2,889 1,625 2,305 994 -- -- -- 4,458 4,200 -- 25,327 Mexican pinyon pinea 1,037 1,182 495 -- 390 593 -- -- -- -- -- -- -- 3,697 Oneseed juniper a 18,038 34,818 60,501 89,570 103,548 147,791 134,037 142,686 148,717 97,584 83,510 58,329 190,626 1,309,755 Ponderosa pine 17,483 25,774 31,114 40,605 43,458 38,255 34,989 34,648 21,991 24,072 15,658 19,166 4,438 351,651 Redberry juniper a 193 534 494 2,405 2,399 4,009 1,981 -- -- 1,337 1,058 2,114 1,905 18,430 Rocky Mountain juniper a 3,421 5,150 5,057 6,326 8,634 7,946 10,403 7,723 4,162 6,221 4,809 -- 17,506 87,357 Singleleaf pinyona 4,163 8,436 7,835 10,112 6,031 4,114 1,703 -- 2,119 -- -- -- -- 44,513 Southwestern white pine 48 368 208 -- -- -- -- -- -- -- -- -- -- 624 Twoneedle pinyona 139,218 219,847 267,759 283,224 212,088 140,501 79,873 66,709 30,482 9,709 15,036 -- -- 1,464,447 Utah juniper a 41,975 77,712 118,217 148,409 165,539 197,306 210,554 222,466 194,638 127,143 128,801 99,126 191,573 1,923,459 White fir -- -- 333 460 -- -- -- -- -- -- -- -- -- 793 Softwood total 263,118 432,351 562,595 659,061 614,445 608,295 530,488 522,680 440,635 297,250 305,172 220,088 554,221 6,010,400 Arizona white oaka 24,998 45,232 54,703 55,062 54,583 47,981 34,313 30,011 20,817 14,119 8,146 -- 11,962 401,926 Aspen 402 402 -- -- -- -- -- -- -- -- -- -- -- 804 Bigtooth maplea 325 539 701 312 2,909 -- -- -- -- -- -- -- -- 4,786 Cottonwood -- -- 271 -- -- -- -- -- -- -- -- -- -- 271 Desert ironwooda 280 544 344 338 301 978 1,975 -- -- -- -- 1,298 -- 6,058 Emory oaka 15,835 30,643 40,635 36,027 38,396 22,774 25,174 8,887 7,707 4,101 3,524 1,885 -- 235,588 Gambel oaka 49,153 44,445 26,315 19,542 11,971 6,420 8,366 5,727 807 8,596 7,444 6,206 2,053 197,045 Mesquitea 11,222 17,016 18,549 18,152 13,503 8,747 7,534 2,183 -- -- -- -- -- 96,907 Mexican blue oaka 746 2,146 2,456 5,822 6,913 1,663 1,634 3,540 2,006 2,178 2,794 1,030 -- 32,928 New Mexico locust a 489 128 -- -- -- -- -- -- -- -- -- -- -- 617 Oak--evergreena 2,578 1,865 4,128 2,595 1,822 -- 3,857 -- -- -- -- -- -- 16,846 Rocky Mountain maplea 153 -- -- -- -- -- -- -- -- -- -- -- -- 153 Silverleaf oaka 5,017 7,164 7,938 6,980 4,021 5,774 2,843 2,108 2,248 -- 2,988 -- -- 47,080 Velvet mesquitea 4,340 5,842 8,030 5,458 5,513 3,595 4,096 3,800 1,713 -- -- 470 -- 42,858 W. honey mesquitea 2,410 3,419 6,890 2,481 2,091 831 1,407 -- -- -- -- -- 6,319 25,848 Hardwood total 117,947 159,386 170,961 152,767 142,022 98,763 91,200 56,255 35,299 28,995 24,896 10,890 20,334 1,109,714 All species 381,065 591,737 733,556 811,828 756,467 707,057 621,688 578,935 475,935 326,245 330,068 230,978 574,555 7,120,114 

aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 103

Table 86--Net annual growth of all live trees on nonreserved woodland by forest 

 type and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Deciduous woodland oak 3,128 791 2,611 6,531 

Evergreen oak 4,652 60 3,933 8,644 

Juniper 4,385 2,358 4,786 11,528 

Mesquite 476 316 623 1,416 

Misc. western hardwoods 70 13 149 233 

Pinyon-juniper 14,396 4,390 20,975 39,761 

Nonstocked woodland 232 21 -3 249 

 All types 27,338 7,950 33,074 68,362 
104 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 87--Net annual growth of all live trees on nonreserved woodland by species and diameter class, Arizona, 1998 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 1,030 469 540 519 465 377 399 237 167 122 192 130 22 4,669 Apache pine 3 3 18 9 -- -- -- 22 -- -- -- -- -- 55 Arizona cypress -- 5 3 -- -- -- -- -- -- -- -- -- -- 8 Arizona pinyon pinea 561 211 63 39 100 35 14 18 2 -- -- -- -- 1,043 Border pinyona 264 75 68 75 41 13 17 4 -- -- -- -- -- 557 California juniper a 4 7 9 7 -- -- -- -- -- -- -- -- -- 27 Chihuahua pine 21 14 10 14 -- -- -- -- -- -- -- -- -- 60 Douglas-fir 210 154 113 141 -111 41 7 -- -- -- 84 152 -- 792 Mexican pinyon pinea 73 18 -19 -- 4 5 -- -- -- -- -- -- -- 80 Oneseed juniper a 1,005 534 705 893 841 906 843 712 713 340 275 167 495 8,428 Ponderosa pine 1,827 1,062 1,059 1,193 1,054 827 247 433 510 242 197 118 29 8,798 Redberry juniper a 6 8 6 24 29 36 14 -- -- 5 5 8 3 143 Rocky Mountain juniper a 147 80 61 53 79 59 36 25 12 12 11 -- 40 615 Singleleaf pinyona 209 147 113 115 67 -168 5 -- 7 -- -- -- -- 496 Southwestern white pine 3 22 6 -- -- -- -- -- -- -- -- -- -- 31 Twoneedle pinyona 6,617 2,654 2,556 2,154 1,222 270 -67 297 136 23 37 -- -- 15,900 Utah juniper a 2,442 1,177 1,343 1,353 1,301 1,374 1,356 1,085 770 429 405 280 503 13,818 White fir -- -- 28 24 -- -- -- -- -- -- -- -- -- 53 Softwood total 14,422 6,641 6,682 6,614 5,091 3,775 2,871 2,831 2,319 1,174 1,206 855 1,091 55,573 Arizona white oaka 1,295 552 479 395 336 286 160 -60 68 -123 38 -- 23 3,448 Aspen 49 25 -- -- -- -- -- -- -- -- -- -- -- 74 Bigtooth maplea 6 8 15 4 38 -- -- -- -- -- -- -- -- 71 Cottonwood -- -- 4 -- -- -- -- -- -- -- -- -- -- 4 Desert ironwooda 29 5 2 2 1 4 7 -- -- -- -- 3 -- 53 Emory oaka 818 320 381 314 247 119 86 30 28 9 15 19 -- 2,386 Gambel oaka 2,751 547 323 213 100 47 46 32 4 25 44 14 4 4,151 Mesquitea 327 107 142 18 59 30 20 5 -- -- -- -- -- 708 Mexican blue oaka 12 30 31 49 51 12 5 12 7 6 8 4 -- 228 New Mexico locust a 144 1 -- -- -- -- -- -- -- -- -- -- -- 145 Oak--evergreena 96 7 -21 15 9 -- 14 -- -- -- -- -- -- 119 Rocky Mountain maplea 2 -- -- -- -- -- -- -- -- -- -- -- -- 2 Silverleaf oaka 256 83 72 54 26 28 12 6 5 -- 4 -- -- 547 Velvet mesquitea 167 83 108 55 38 15 16 18 6 -- -- 1 -- 507 W. honey mesquitea 168 56 73 19 13 3 6 -- -- -- -- -- 10 348 Hardwood total 6,119 1,825 1,610 1,138 917 543 372 42 120 -83 109 41 37 12,789 All species 20,541 8,466 8,292 7,752 6,008 4,317 3,244 2,873 2,439 1,091 1,315 896 1,128 68,362 aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 105

Table 88--Annual mortality of all trees on nonreserved woodland by forest type and 

 owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Deciduous woodland oak 82 -- 532 614 

Evergreen oak 578 -- 419 997 

Juniper 245 -- 5 250 

Mesquite 4 -- 141 145 

Misc. western hardwoods -- -- -- -- 

Pinyon-juniper 1,515 17 2,295 3,826 

Nonstocked woodland 174 -- 131 305 

 All types 2,598 17 3,522 6,137 
106 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 89--Annual mortality of all trees on nonreserved woodland by species and diameter class, Arizona, 1998 Diameter class (inches) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 7 5 -- -- 50 85 -- -- -- -- -- -- 343 489 Apache pine -- -- -- -- -- -- -- -- -- -- -- -- -- -- Arizona cypress -- -- -- -- -- -- -- -- -- -- -- -- -- -- Arizona pinyon pinea 7 -- 132 131 -- -- -- -- -- -- -- -- -- 269 Border pinyona 19 72 52 -- -- -- -- -- -- -- -- -- -- 142 California juniper a -- -- -- -- -- -- -- -- -- -- -- -- -- -- Chihuahua pine -- 11 -- -- -- -- -- -- -- -- -- -- -- 11 Douglas-fir -- -- -- -- 153 -- -- -- -- -- -- -- -- 153 Mexican pinyon pinea -- -- 27 -- -- -- -- -- -- -- -- -- -- 27 Oneseed juniper aa -- -- 18 -- -- 131 -- -- -- -- -- -- -- 150 Ponderosa pine 39 218 104 66 -- -- 300 347 -- -- -- -- -- 1,075 Redberry juniper -- -- -- -- -- -- -- -- -- -- -- -- -- -- Rocky Mountain juniper a 4 -- -- -- -- -- -- -- -- -- -- -- -- 4 Singleleaf pinyona 13 -- -- -- -- 193 -- -- -- -- -- -- -- 206 Southwestern white pine -- -- -- -- -- -- -- -- -- -- -- -- -- -- Twoneedle pinyona 179 324 413 336 210 464 474 -- -- -- -- -- -- 2,401 Utah junipera 12 19 24 73 62 -- -- -- -- -- -- -- -- 191 White fir -- -- -- -- -- -- -- -- -- -- -- -- -- -- Softwood total 281 648 771 606 475 874 775 347 -- -- -- -- 343 5,118 Arizona white oaka 59 34 47 46 65 -- -- 183 -- 181 -- -- -- 614 Aspen -- -- -- -- -- -- -- -- -- -- -- -- -- -- Bigtooth maplea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Cottonwood -- -- -- -- -- -- -- -- -- -- -- -- -- -- Desert ironwooda -- -- -- -- -- -- -- -- -- -- -- -- -- -- Emory oaka 14 13 28 -- 24 -- -- -- -- -- -- -- -- 79 Gambel oaka 87 -- -- -- -- -- -- -- -- -- -- -- -- 87 Mesquitea -- 45 -- 95 -- -- -- -- -- -- -- -- -- 141 Mexican blue oaka -- -- -- -- -- -- -- -- -- -- -- -- -- -- New Mexico locusta -- -- -- -- -- -- -- -- -- -- -- -- -- -- Oak--evergreena -- 17 51 -- -- -- -- -- -- -- -- -- -- 68 Rocky Mountain maplea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Silverleaf oaka 8 13 -- -- -- -- -- -- -- -- -- -- -- 22 Velvet mesquitea 8 -- -- -- -- -- -- -- -- -- -- -- -- 8 W. honey mesquitea -- -- -- -- -- -- -- -- -- -- -- -- -- -- Hardwood total 176 123 127 141 88 -- -- 183 -- 181 -- -- -- 1,019 All species 457 771 897 747 564 874 775 530 -- 181 -- -- 343 6,137 aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 107

Core Tables

Table 91--Area of reserved timberland and other forest land by forest 

 type, Arizona, 1999 

 

 Forest land 

 Other 

 Reserved forest 

Forest type timberland land Total

- - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - 

Aspen 43,779 -- 43,779 

Blue spruce -- -- -- 

Cottonwood -- -- -- 

Deciduous woodland oak -- 311,532 311,532 

Douglas-fir 32,122 -- 32,122 

Engelmann spruce 20,319 -- 20,319 

Evergreen oak -- 1,616,135 1,616,135 

Juniper -- 3,106,068 3,106,068 

Maple woodland -- 8,875 8,875 

Mesquite -- 1,426,544 1,426,544 

Misc. western hardwoods -- 126,657 126,657 

Other western softwoods 14,222 50,579 64,801 

Pinyon-juniper -- 7,777,827 7,777,827 

Ponderosa pine 170,014 6,288 176,303 

Spruce-fir 6,536 -- 6,536 

White fir 17,700 -- 17,700 

Nonstocked timberland 7,977 -- 7,977 

Nonstocked woodland -- 1,156,776 1,156,776 

 All types 312,670 15,587,281 15,899,951 

Table 90--Area by county and land class, Arizona, 1999 

 

 Forest land 

 Other 

 Reserved forest 

County Timberland timberland land Nonforest Water Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Apache 938,602 12,279 1,918,246 4,298,779 12,363 7,180,269 

Cochise 1,620 20,716 653,378 3,299,652 -- 3,975,367 

Coconino 1,626,390 150,588 2,885,103 7,225,307 37,301 11,924,689 

Gila 166,344 13,180 1,742,885 1,135,447 16,529 3,074,385 

Graham 122,140 6,560 768,500 2,065,769 7,571 2,970,541 

Greenlee 124,691 64,695 494,803 503,881 -- 1,188,070 

La Paz -- -- 5,789 2,869,775 13,178 2,888,742 

Maricopa -- 7,977 155,335 5,724,134 16,465 5,903,910 

Mohave -- 12,916 1,507,414 6,952,497 142,806 8,615,633 

Navajo 475,638 -- 1,712,980 4,185,709 1,636 6,375,963 

Pima 5,893 6,365 1,244,999 4,625,083 -- 5,882,340 

Pinal -- 4,948 208,412 3,213,561 12,280 3,439,202 

Santa Cruz -- -- 420,780 371,055 -- 791,835 

Yavapai 65,702 12,446 1,847,722 3,294,820 -- 5,220,690 

Yuma -- -- 20,936 3,511,435 -- 3,532,371 

 Total 3,527,021 312,670 15,587,281 53,276,905 260,129 72,964,006 

a

 

 a

On this and all subsequent tables, timberland includes nonreserved forest land with productivity class 

20 cubic feet per acre per year and greater. 
108 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 93--Area of nonreserved timberland by forest type and owner group, 

 Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - 

Aspen 56,645 -- 46,668 103,313 

Blue spruce 4,890 -- 12,115 17,006 

Cottonwood 9,196 -- 4,530 13,726 

Deciduous woodland oak -- -- -- -- 

Douglas-fir 134,979 -- 72,507 207,487 

Engelmann spruce 65,006 -- 42,004 107,010 

Evergreen oak -- -- -- -- 

Juniper -- -- -- -- 

Maple woodland -- -- -- -- 

Mesquite -- -- -- -- 

Misc. western hardwoods -- -- -- -- 

Other western softwoods 18,181 -- 11,037 29,218 

Pinyon-juniper -- -- -- -- 

Ponderosa pine 1,981,847 44,349 844,661 2,870,857 

Spruce-fir 4,890 -- 7,027 11,918 

White fir 60,700 -- 12,519 73,219 

Nonstocked timberland 68,943 -- 24,325 93,268 

Nonstocked woodland -- -- -- -- 

 All types 2,405,277 44,349 1,077,395 3,527,021 

Table 92--Area of nonreserved timberland by county and ownership class, Arizona, 1999 

 

 Ownership class 

 Bureau of 

 National Land Miscellaneous County and Indian Other 

County Forest Management federal State municipal Trust private Total 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Apache 327,891 -- -- -- -- 600,411 10,300 938,602 

Cochise 1,620 -- -- -- -- -- -- 1,620 

Coconino 1,505,955 -- 32,764 11,585 -- 43,107 32,980 1,626,390 

Gila 149,555 -- -- -- -- 16,788 -- 166,344 

Graham 30,941 -- -- -- -- 91,199 -- 122,140 

Greenlee 124,691 -- -- -- -- -- -- 124,691 

Maricopa -- -- -- -- -- -- -- -- 

Mohave -- -- -- -- -- -- -- -- 

Navajo 193,028 -- -- -- -- 282,611 -- 475,638 

Pima 5,893 -- -- -- -- -- -- 5,893 

Pinal -- -- -- -- -- -- -- -- 

Santa Cruz -- -- -- -- -- -- -- -- 

Yavapai 65,702 -- -- -- -- -- -- 65,702 

Yuma -- -- -- -- -- -- -- -- 

 Total 2,405,277 -- 32,764 11,585 -- 1,034,116 43,280 3,527,021 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 109

Table 94--Area of nonreserved timberland by owner group and stand-size class, 

 Arizona, 1999 

 

 Stand-size class 

 Sapling/ All 

Owner group Sawtimber Poletimber seedling Nonstocked classes 

- - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - 

National Forest 2,143,166 118,409 74,759 68,943 2,405,277 

Other public 37,651 -- 6,698 -- 44,349 

Nonindustrial private 933,335 66,737 52,999 24,325 1,077,395 

 Total 3,114,151 185,145 134,456 93,268 3,527,021 

Table 95--Area of nonreserved timberland by owner group and productivity 

 class, Arizona, 1999 

 

 Productivity class 

Owner group 85-119 50-84 20-49 Total 

- - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - 

National Forest 1,631 519,546 1,884,100 2,405,277 

Other public -- -- 44,349 44,349 

Nonindustrial private 25,227 426,017 626,152 1,077,395 

 Total 26,857 945,563 2,554,601 3,527,021 

Table 96--Area of nonreserved timberland by forest type and stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ 

Forest type Sawtimber Poletimber seedling Nonstocked Total 

- - - - - - - - - - - - - - - - - - - - - - - Acres - - - - - - - - - - - - - - - - - - - - - - - - 

Aspen 60,610 25,193 17,510 -- 103,313 

Blue spruce 13,858 -- 3,148 -- 17,006 

Cottonwood 10,753 2,973 -- -- 13,726 

Deciduous woodland oak -- -- -- -- -- 

Douglas-fir 184,566 13,290 9,631 -- 207,487 

Engelmann spruce 97,380 6,276 3,354 -- 107,010 

Evergreen oak -- -- -- -- -- 

Juniper -- -- -- -- -- 

Maple woodland -- -- -- -- -- 

Mesquite -- -- -- -- -- 

Misc. western hardwoods -- -- -- -- -- 

Other western softwoods 18,181 -- 11,037 -- 29,218 

Pinyon-juniper -- -- -- -- -- 

Ponderosa pine 2,643,668 137,414 89,776 -- 2,870,857 

Spruce-fir 11,918 -- -- -- 11,918 

White fir 73,219 -- -- -- 73,219 

Nonstocked timberland -- -- -- 93,268 93,268 

Nonstocked woodland -- -- -- -- -- 

 Total 3,114,151 185,145 134,456 93,268 3,527,021 
110 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 97--Number of live trees on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alligator juniper a 30,860 15,117 7,070 4,259 2,854 1,624 1,128 643 222 490 223 175 -- 112 333 65,109 Arizona cypress 467 -- 112 37 -- -- 37 -- -- -- -- -- -- -- -- 654 Blue spruce 474 553 433 245 327 330 188 44 38 38 -- -- -- -- -- 2,670 Chihuahua pine 1,886 943 417 151 76 -- 38 -- -- -- -- -- -- -- -- 3,510 Corkbark fir 5,968 2,823 1,367 830 635 360 283 282 85 -- 29 -- -- -- -- 12,662 Douglas-fir 49,837 25,381 13,378 9,005 6,689 3,728 2,723 1,759 1,173 744 392 331 347 81 725 116,293 Engelmann spruce 13,099 13,315 4,524 3,653 2,916 2,406 1,298 731 618 550 283 42 -- -- 38 43,474 Oneseed juniper a 1,383 1,016 278 155 117 70 76 -- -- -- -- 41 -- -- -- 3,136 Ponderosa pine 181,419 136,865 93,906 77,581 58,854 38,568 24,187 15,085 9,998 6,589 4,686 3,536 1,613 1,291 1,611 655,789 Redberry juniper a -- -- -- -- -- 38 -- -- -- -- -- -- -- -- -- 38 Rocky Mountain juniper a 9,492 4,504 1,673 1,009 787 770 140 159 117 -- 52 -- 39 -- -- 18,743 Singleleaf pinyona 1,904 -- 37 41 81 -- -- -- -- -- -- -- -- -- -- 2,063 Southwestern white pine 4,559 969 1,964 1,791 954 517 658 352 44 104 59 67 44 37 44 12,163 Subalpine fir 367 -- 134 118 146 201 39 67 -- -- -- -- -- -- -- 1,072 Twoneedle pinyona 10,532 3,254 2,691 2,031 635 593 157 159 80 -- -- -- 41 -- -- 20,174 Utah juniper a 3,354 971 608 598 647 334 80 80 109 -- 38 -- -- -- 41 6,862 White fir 26,456 9,350 5,467 4,435 2,996 2,098 1,227 832 836 347 395 151 73 237 52 54,952 Softwood total 342,054 215,061 134,061 105,940 78,715 51,637 32,260 20,194 13,319 8,862 6,158 4,343 2,158 1,758 2,843 1,019,363 Arizona white oaka 13,416 8,009 6,470 4,705 3,273 1,631 778 505 152 72 187 35 -- -- 117 39,349 Aspen 42,696 10,115 5,433 4,894 4,456 3,174 1,713 1,328 328 213 38 -- -- -- -- 74,389 Bigtooth maplea 4,725 2,365 793 188 38 -- 38 -- -- -- -- -- -- -- -- 8,147 Cottonwood -- 933 112 150 75 37 37 37 37 -- -- -- -- -- -- 1,420 Emory oaka 4,868 467 790 685 303 149 -- 120 81 -- -- -- -- -- -- 7,463 Gambel oaka 157,191 38,790 25,531 9,748 4,569 2,933 1,501 1,029 536 642 307 226 117 38 227 243,385 New Mexico locust a 49,647 6,632 699 147 38 71 -- -- -- -- -- -- -- -- -- 57,233 Oak--evergreena -- -- -- 38 -- -- -- -- -- -- -- -- -- -- -- 38 Rocky Mountain maplea -- -- 42 35 109 35 -- -- -- -- -- -- -- -- -- 222 Silverleaf oaka 5,719 953 268 77 38 -- -- -- -- -- -- -- -- -- -- 7,055 Hardwood total 278,262 68,264 40,138 20,667 12,900 8,030 4,068 3,021 1,134 927 532 261 117 38 345 438,702 All species 620,317 283,325 174,200 126,607 91,614 59,667 36,328 23,214 14,453 9,789 6,690 4,604 2,275 1,796 3,188 1,458,065 aDiameter taken at root collar rather than at breast height.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 111 Table 98--Number of growing-stock trees on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 1.0- 2.9 3.0- 4.9 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand trees - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 467 -- 112 37 -- -- 37 -- -- -- -- -- -- -- -- 654 Blue spruce 474 553 433 245 327 330 188 44 38 38 -- -- -- -- -- 2,670 Chihuahua pine 1,414 943 417 151 76 -- 38 -- -- -- -- -- -- -- -- 3,039 Corkbark fir 5,441 2,823 1,367 830 635 360 283 282 85 -- 29 -- -- -- -- 12,135 Douglas-fir 43,805 24,323 13,267 8,935 6,575 3,728 2,723 1,759 1,173 744 392 331 347 81 686 108,869 Engelmann spruce 12,102 13,315 4,488 3,653 2,877 2,406 1,260 731 618 550 283 42 -- -- 38 42,363 Ponderosa pine 162,155 127,334 91,291 76,577 58,625 38,260 24,043 14,928 9,882 6,555 4,686 3,536 1,613 1,291 1,573 622,351 Southwestern white pine 4,082 969 1,888 1,791 954 517 658 352 44 66 59 67 44 37 44 11,572 Subalpine fir 367 -- 134 118 146 201 39 67 -- -- -- -- -- -- -- 1,072 White fir 24,568 9,350 5,391 4,293 2,996 2,098 1,227 832 836 347 395 113 73 237 52 52,808 Softwood total 254,874 179,610 118,790 96,630 73,211 47,900 30,496 18,995 12,676 8,300 5,845 4,090 2,078 1,646 2,392 857,531 Aspen 40,671 9,148 4,972 4,287 4,134 2,989 1,570 1,216 262 137 38 -- -- -- -- 69,422 Cottonwood -- 933 75 112 75 37 37 37 37 -- -- -- -- -- -- 1,345 Hardwood total 40,671 10,081 5,047 4,399 4,209 3,026 1,607 1,253 299 137 38 -- -- -- -- 70,767 All species 295,544 189,691 123,837 101,030 77,419 50,926 32,103 20,248 12,975 8,437 5,883 4,090 2,078 1,646 2,392 928,298 Table 99--Net volume of growing stock on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 5.0- 6.9 7.0- 8.9 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress 112 127 -- -- 584 -- -- -- -- -- -- -- -- 822 Blue spruce 968 1,568 3,495 6,295 4,676 1,372 1,859 2,703 -- -- -- -- -- 22,936 Chihuahua pine 461 419 397 -- 680 -- -- -- -- -- -- -- -- 1,956 Corkbark fir 2,640 3,919 6,881 6,434 8,239 13,174 3,925 -- 2,886 -- -- -- -- 48,098 Douglas-fir 26,537 40,177 56,567 52,248 59,497 54,266 49,469 40,384 26,558 26,046 31,349 8,710 139,730 611,537 Engelmann spruce 8,099 20,019 31,725 43,367 36,842 28,383 36,853 42,312 30,383 6,062 -- -- 5,649 289,694 Ponderosa pine 158,565 326,823 469,946 507,609 484,622 430,821 405,413 358,302 378,731 351,757 196,510 181,965 329,076 4,580,140 Southwestern white pine 3,606 7,354 7,941 6,717 12,992 11,400 1,317 4,293 4,486 6,036 5,792 5,528 7,842 85,304 Subalpine fir 238 593 1,466 4,199 1,298 2,290 -- -- -- -- -- -- -- 10,084 White fir 9,750 18,328 23,654 27,445 24,792 24,750 34,202 18,383 25,558 10,549 7,830 31,377 6,560 263,177 Softwood total 210,974 419,325 602,072 654,315 634,221 566,457 533,038 466,377 468,602 400,451 241,481 227,579 488,857 5,913,750 Aspen 13,833 27,431 53,559 61,272 43,935 52,115 12,386 7,556 2,713 -- -- -- -- 274,801 Cottonwood 140 443 585 471 668 878 1,230 -- -- -- -- -- -- 4,414 Hardwood total 13,973 27,874 54,144 61,743 44,603 52,993 13,616 7,556 2,713 -- -- -- -- 279,215 All species 224,948 447,199 656,216 716,057 678,824 619,451 546,654 473,933 471,315 400,451 241,481 227,579 488,857 6,192,965 
112 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 Table 101--Net volume of growing stock on nonreserved timberland by species and owner group, Arizona, 1999 Owner group National Other Nonindustrial Species Forest public private Total - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - Arizona cypress 822 -- -- 822 Blue spruce 1,390 -- 21,546 22,936 Chihuahua pine 35 -- 1,920 1,956 Corkbark fir 21,939 -- 26,159 48,098 Douglas-fir 418,076 -- 193,461 611,537 Engelmann spruce 132,575 -- 157,119 289,694 Ponderosa pine 3,190,703 62,503 1,326,934 4,580,140 Southwestern white pine 69,932 -- 15,372 85,304 Subalpine fir 10,084 -- -- 10,084 White fir 216,006 -- 47,171 263,177 Softwood total 4,061,564 62,503 1,789,682 5,913,750 Aspen 125,628 -- 149,174 274,801 Cottonwood 2,662 -- 1,752 4,414 Hardwood total 128,289 -- 150,926 279,215 All species 4,189,853 62,503 1,940,608 6,192,965 Table 100--Net volume of sawtimber (Scribner rule) on nonreserved timberland by species and diameter class, Arizona, 1999 Diameter class (inches at breast height) Species 9.0- 10.9 11.0- 12.9 13.0- 14.9 15.0- 16.9 17.0- 18.9 19.0- 20.9 21.0- 22.9 23.0- 24.9 25.0- 26.9 27.0- 28.9 29.0+ All classes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Arizona cypress -- -- 2,623 -- -- -- -- -- -- -- -- 2,623 Blue spruce 10,517 23,826 20,260 6,304 8,907 13,174 -- -- -- -- -- 82,988 Chihuahua pine 1,037 -- 2,956 -- -- -- -- -- -- -- -- 3,993 Corkbark fir 21,074 25,072 35,436 58,095 18,655 -- 14,299 -- -- -- -- 172,631 Douglas-fir 143,381 177,752 236,964 240,231 235,048 199,041 129,030 137,352 173,598 47,297 789,144 2,508,837 Engelmann spruce 98,473 169,191 161,360 128,401 172,719 204,013 142,007 30,135 -- -- 28,582 1,134,879 Ponderosa pine 1,193,867 1,758,444 1,985,788 1,950,841 1,952,153 1,823,132 2,073,278 1,977,390 1,120,829 1,050,881 1,920,208 18,806,810 Southwestern white pine 20,172 21,780 48,963 49,023 5,831 21,597 23,581 31,135 32,210 28,340 42,863 325,495 Subalpine fir 4,473 16,578 5,667 10,549 -- -- -- -- -- -- -- 37,268 White fir 54,810 87,118 91,631 100,055 149,513 83,788 119,145 52,515 40,320 164,210 34,316 977,422 Softwood total 1,547,803 2,279,761 2,591,648 2,543,499 2,542,826 2,344,745 2,501,340 2,228,527 1,366,957 1,290,728 2,815,113 24,052,945 Aspen 243,386 200,775 250,409 63,067 37,122 12,852 -- -- -- -- 807,611 Cottonwood 1,965 2,912 4,047 5,139 -- -- -- -- -- -- 14,063 Hardwood total 245,351 203,687 254,456 68,206 37,122 12,852 -- -- -- -- 821,674 All species 1,547,803 2,525,111 2,795,335 2,797,955 2,611,031 2,381,867 2,514,192 2,228,527 1,366,957 1,290,728 2,815,113 24,874,619 (a) (a) (a) aHardwoods are not considered sawtimber until they are 11 inches d.b.h.
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 113

Table 103--Net volume of growing stock on nonreserved timberland by forest type and 

 stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ All 

Forest type Sawtimber Poletimber seedling Nonstocked classes 

- - - - - - - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - - - - - 

Aspen 159,274 77,652 1,770 -- 238,696 

Blue spruce 36,676 -- 243 -- 36,919 

Cottonwood 9,177 -- -- -- 9,177 

Douglas-fir 560,514 15,500 4,725 -- 580,739 

Engelmann spruce 302,117 7,988 397 -- 310,502 

Other western softwoods 50,644 -- 6,225 -- 56,869 

Ponderosa pine 4,594,600 81,812 22,026 -- 4,698,439 

Spruce-fir 49,843 -- -- -- 49,843 

White fir 203,300 -- -- -- 203,300 

Nonstocked timberland -- -- -- 8,481 8,481 

 All types 5,966,144 182,953 35,387 8,481 6,192,965 

Table 102--Net volume of sawtimber (Scribner rule) on nonreserved timberland 

 by species and owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Species Forest public private Total 

- - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Arizona cypress 2,623 -- -- 2,623 

Blue spruce 4,397 -- 78,590 82,988 

Chihuahua pine -- -- 3,993 3,993 

Corkbark fir 79,938 -- 92,693 172,631 

Douglas-fir 1,765,686 -- 743,151 2,508,837 

Engelmann spruce 515,483 -- 619,396 1,134,879 

Ponderosa pine 12,975,289 284,198 5,547,323 18,806,810 

Southwestern white pine 275,863 -- 49,633 325,495 

Subalpine fir 37,268 -- -- 37,268 

White fir 807,500 -- 169,922 977,422 

 Softwood total 16,464,045 284,198 7,304,702 24,052,945 

Aspen 352,726 -- 454,885 807,611 

Cottonwood 8,924 -- 5,139 14,063 

 Hardwood total 361,651 -- 460,023 821,674 

 All species 16,825,696 284,198 7,764,725 24,874,619 

Table 104--Net volume of sawtimber (Scribner rule) on nonreserved timberland by forest type 

 and stand-size class, Arizona, 1999 

 

 Stand-size class 

 Sapling/ All 

Forest type Sawtimber Poletimber seedling Nonstocked classes 

- - - - - - - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - - - - - - 

Aspen 537,473 194,129 5,013 -- 736,615 

Blue spruce 131,856 -- 546 -- 132,402 

Cottonwood 32,237 -- -- -- 32,237 

Douglas-fir 2,352,537 26,052 13,757 -- 2,392,346 

Engelmann spruce 1,249,183 10,681 -- -- 1,259,865 

Other western softwoods 214,382 -- 25,351 -- 239,733 

Ponderosa pine 18,867,947 134,937 75,305 -- 19,078,189 

Spruce-fir 194,185 -- -- -- 194,185 

White fir 780,019 -- -- -- 780,019 

Nonstocked timberland -- -- -- 29,028 29,028 

 All types 24,359,819 365,800 119,971 29,028 24,874,619 
114 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 105--Net volume of growing stock on nonreserved timberland by forest type 

 and owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Aspen 95,111 -- 143,585 238,696 

Blue spruce 1,831 -- 35,088 36,919 

Cottonwood 7,425 -- 1,752 9,177 

Douglas-fir 414,341 -- 166,398 580,739 

Engelmann spruce 159,990 -- 150,512 310,502 

Other western softwoods 50,644 -- 6,225 56,869 

Ponderosa pine 3,273,614 62,503 1,362,321 4,698,439 

Spruce-fir 13,351 -- 36,492 49,843 

White fir 166,228 -- 37,071 203,300 

Nonstocked timberland 7,317 -- 1,165 8,481 

 All types 4,189,853 62,503 1,940,608 6,192,965 

Table 106--Net volume of sawtimber (Scribner rule) on nonreserved timberland by 

 forest type and owner group, Arizona, 1999 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Aspen 290,954 -- 445,661 736,615 

Blue spruce 5,444 -- 126,958 132,402 

Cottonwood 27,098 -- 5,139 32,237 

Douglas-fir 1,739,332 -- 653,014 2,392,346 

Engelmann spruce 641,601 -- 618,264 1,259,865 

Other western softwoods 214,382 -- 25,351 239,733 

Ponderosa pine 13,199,161 284,198 5,594,830 19,078,189 

Spruce-fir 46,600 -- 147,585 194,185 

White fir 633,329 -- 146,690 780,019 

Nonstocked timberland 27,794 -- 1,234 29,028 

 All types 16,825,696 284,198 7,764,725 24,874,619 

Table 107--Net volume of trees on nonreserved timberland by 

 class of timber, and softwoods and hardwoods, 

 Arizona, 1999 

 

Class of timber Softwoods Hardwoods Total 

- - - - - - - - Thousand cubic feet - - - - - - - - 

Sawtimber trees 

 Sawlog portion 4,709,566 137,285 4,846,851 

 Upper-stem portion 573,884 45,939 619,823 

 Total 5,283,450 183,224 5,466,674 

Poletimber trees 630,300 95,991 726,291 

 All growing-stock trees 5,913,750 279,215 6,192,965 

Rough cull trees 33,929 11,437 45,366 

Rotten cull trees 1,654 4,150 5,804 

Live woodland tree volume 207,115 349,514 556,629 

Salvable dead trees 425,157 108,665 533,822 

 All timber 6,581,605 752,982 7,334,587 
USDA Forest Service Resour. Bull. RMRS-RB-2. 2002 115

Table 108--Net annual growth of growing stock on nonreserved timberland by 

 forest type and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - - 

Aspen 1,434 -- 2,865 4,300 

Blue spruce 59 -- 1,016 1,075 

Cottonwood 300 -- 121 421 

Douglas-fir 6,870 -- 3,166 10,035 

Engelmann spruce 786 -- 1,165 1,951 

Other western softwoods -1,994 -- 191 -1,803 

Ponderosa pine 72,162 1,867 30,371 104,399 

Spruce-fir 415 -- 240 655 

White fir 2,149 -- 831 2,980 

Nonstocked timberland 282 -- 109 391 

 All types 82,463 1,867 40,075 124,404 

Table 109--Net annual growth of sawtimber (Scribner rule) on nonreserved 

 timberland by forest type and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Aspen 8,095 -- 17,237 25,332 

Blue spruce 185 -- 5,832 6,017 

Cottonwood 1,273 -- 171 1,444 

Douglas-fir 32,013 -- 12,749 44,762 

Engelmann spruce 5,057 -- 5,611 10,669 

Other western softwoods -13,087 -- 835 -12,252 

Ponderosa pine 329,645 9,446 142,525 481,616 

Spruce-fir 1,735 -- 1,255 2,990 

White fir 7,457 -- 3,565 11,023 

Nonstocked timberland 801 -- 164 965 

 All types 373,175 9,446 189,945 572,566 

Table 110--Annual mortality of growing stock on nonreserved timberland by forest 

 type and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand cubic feet - - - - - - - - - - - - - 

Aspen 1,523 -- 996 2,518 

Blue spruce -- -- 186 186 

Cottonwood -- -- -- -- 

Douglas-fir 1,216 -- 340 1,556 

Engelmann spruce 3,053 -- 2,020 5,073 

Other western softwoods 3,108 -- -- 3,108 

Ponderosa pine 4,050 -- 2,317 6,366 

Spruce-fir -- -- 263 263 

White fir 1,903 -- 47 1,949 

Nonstocked timberland -- -- -- -- 

 All types 14,853 -- 6,168 21,021 
116 USDA Forest Service Resour. Bull. RMRS-RB-2. 2002

Table 111--Annual mortality of sawtimber (Scribner rule) on nonreserved 

 timberland by forest type and owner group, Arizona, 1998 

 

 Owner group 

 National Other Nonindustrial 

Forest type Forest public private Total 

- - - - - - - - - - - - - Thousand board feet - - - - - - - - - - - - - 

Aspen 2,545 -- 2,412 4,957 

Blue spruce -- -- 62 62 

Cottonwood -- -- -- -- 

Douglas-fir 4,340 -- 1,641 5,981 

Engelmann spruce 13,499 -- 7,483 20,982 

Other western softwoods 17,592 -- -- 17,592 

Ponderosa pine 12,095 -- 8,518 20,613 

Spruce-fir -- -- 777 777 

White fir 6,956 -- -- 6,956 

Nonstocked timberland -- -- -- -- 

 All types 57,027 -- 20,892 77,919 
Federal Recycling Program Printed on Recycled Paper

You may order additional copies of this publication by sending your mailing information in

label form through one of the following media. Please specify the publication title and

Resource Bulletin number.

Fort Collins Service Center

Telephone (970) 498-1392

FAX (970) 498-1396

E-mail rschneider@fs.fed.us

Web site http://www.fs.fed.us/rm

Mailing Address Publications Distribution

Rocky Mountain Research Station

240 West Prospect Road

Fort Collins, CO 80526
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its

programs and activities on the basis of race, color, national origin, sex, religion,

age, disability, political beliefs, sexual orientation, or marital or family status. (Not

all prohibited bases apply to all programs.) Persons with disabilities who require

alternative means for communication of program information (Braille, large print,

audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice

and TDD).

To file a complaint of discrimination, write USDA, Director, Office of Civil Rights,

Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington,

DC 20250-9410 or call 202-720-5964 (voice or TDD). USDA is an equal opportunity provider and employer.

ROCKY MOUNTAIN RESEARCH STATION

RMRS

The Rocky Mountain Research Station develops scientific information and technology to improve management, protection, and use of

the forests and rangelands. Research is designed to meet the needs

of National Forest managers, Federal and State agencies, public and

private organizations, academic institutions, industry, and individuals.

Studies accelerate solutions to problems involving ecosystems,

range, forests, water, recreation, fire, resource inventory, land reclamation, community sustainability, forest engineering technology,

multiple use economics, wildlife and fish habitat, and forest insects

and diseases. Studies are conducted cooperatively, and applications

may be found worldwide.

Research Locations

Flagstaff, Arizona Reno, Nevada

Fort Collins, Colorado* Albuquerque, New Mexico

Boise, Idaho Rapid City, South Dakota

Moscow, Idaho Logan, Utah

Bozeman, Montana Ogden, Utah

Missoula, Montana Provo, Utah

Lincoln, Nebraska Laramie, Wyoming

*Station Headquarters, Natural Resources Research Center,

2150 Centre Avenue, Building A, Fort Collins, CO 80526