-- DBMS: bigquery
CREATE TABLE `bigquery-public-data.usfs_fia.tree`
(
  tree_sequence_number INT64 OPTIONS(description="Foreign key linking the tree regional biomass record to the tree record."),
  plot_sequence_number INT64 OPTIONS(description="Foreign key linking the subplot record to the plot record"),
  previous_tree_sequence_number INT64 OPTIONS(description="Foreign key linking the tree to the previous inventory's tree record for this tree. Only populated on trees remeasured from a previous annual inventory."),
  tree_inventory_year INT64 OPTIONS(description="The year that best represents when the inventory data were collected. Under the annual inventory system, a group of plots is selected each year for sampling. The selection is based on a panel system. Inventory year is the year in which the majority of plots in that group were collected (plots in the group have the same panel and, if applicable, subpanel). Under periodic inventory, a reporting inventory year was selected, usually based on the year in which the majority of the plots were collected or the mid-point of the years over which the inventory spanned. For either annual or periodic inventory, Inventory year is not necessarily the same as measurement year."),
  tree_state_code INT64 OPTIONS(description="Bureau of the Census Federal Information Processing Standards (FIPS) two-digit code for each State. Refer to appendix B."),
  tree_survey_unit_code INT64 OPTIONS(description="Forest Inventory and Analysis survey unit identification number. Survey units are usually groups of counties within each State. For periodic inventories, Survey units may be made up of lands of particular owners. Refer to appendix B for codes."),
  tree_county_code INT64 OPTIONS(description="The identification number for a county, parish, watershed, borough, or similar governmental unit in a State. FIPS codes from the Bureau of the Census are used. Refer to appendix B for codes."),
  tree_phase_2_plot_number INT64 OPTIONS(description="An identifier for a plot. Along with state code, inventory year, tree survey unit code, County code and/or some other combinations of variables, PLOT may be used to uniquely identify a plot."),
  subplot_number INT64 OPTIONS(description="The number assigned to the subplot. The national plot design (PLOT.DESIGNCD = 1) has subplot number values of 1 through 4. Other plot designs have various subplot number values. See PLOT.DESIGNCD and appendix I for information about plot designs. For more explanation about SUBP, contact the appropriate FIA work unit (table 1-1)."),
  tree_record_number INT64 OPTIONS(description="A number used to uniquely identify a tree on a subplot. Tree numbers can be used to track trees when PLOT.DESIGNCD is the same between inventories."),
  condition_class_number INT64 OPTIONS(description="The unique identifying number assigned to a condition on which the seedling is located. See COND.CONDID for details on the attributes which delineate a condition."),
  azimuth INT64 OPTIONS(description="The direction, to the nearest degree, from subplot center to the center of the base of the tree (geographic center for multi-stemmed woodland species). Due north is represented by 360 degrees."),
  horizontal_distance FLOAT64 OPTIONS(description="The horizontal distance in feet from subplot center (microplot center for saplings) to the center of the base of the tree (geographic center for multi-stemmed woodland species). This attribute is populated for live and standing dead trees 1.0 inch DBH/DRC in a forest condition that were measured on any of the four subplots of the national plot design. It may be populated for other tree records."),
  previous_condition_number INT64 OPTIONS(description="Identifies the condition within the plot on which the tree occurred at the previous inventory"),
  tree_status_code INT64 OPTIONS(description="A code indicating whether the sample tree is live, cut, or dead at the time of measurement. Includes dead and cut trees, which are required to estimate aboveground biomass and net annual volume for growth, mortality, and removals. This code is not used when querying data for change estimates."),
  tree_status_code_name STRING OPTIONS(description="A code indicating whether the sample tree is live, cut, or dead at the time of measurement. Includes dead and cut trees, which are required to estimate aboveground biomass and net annual volume for growth, mortality, and removals. This code is not used when querying data for change estimates."),
  species_code INT64 OPTIONS(description="An FIA tree species code. Refer to appendix F for codes."),
  species_common_name STRING OPTIONS(description="An FIA tree species code. Refer to appendix F for codes."),
  species_scientific_name STRING OPTIONS(description="An FIA tree species code. Refer to appendix F for codes."),
  species_group_code INT64 OPTIONS(description="A code assigned to each tree species in order to group them for reporting purposes on presentation tables. Codes and their associated names are shown in appendix E. Individual tree species and corresponding species group codes are shown in appendix F."),
  species_group_code_name STRING OPTIONS(description="A code assigned to each tree species in order to group them for reporting purposes on presentation tables. Codes and their associated names are shown in appendix E. Individual tree species and corresponding species group codes are shown in appendix F."),
  current_diameter FLOAT64 OPTIONS(description="The current diameter (in inches) of the sample tree at the point of diameter measurement. DIA is measured at either breast height (DBH) or at root collar (DRC). DBH is usually measured at 4.5 feet above the ground line on the uphill side of the tree. DRC is measured on woodland species (often multi-stemmed) at the ground line or at the stem root collar, whichever is higher. DRC is computed using the following formula: DRC = SQRT [SUM (stem diameter2)] For additional information about where the tree diameter is measured, see Diameter height code or Height to diameter measurement point. Current diameter for live trees contains the measured value. DIA for cut and dead trees presents problems associated with uncertainty of when the tree was cut or died as well as structural deterioration of dead trees. Consult individual FIA work units for explanations of how Current diameter is collected for dead and cut trees."),
  diameter_height_code INT64 OPTIONS(description="A code indicating the location at which diameter was measured. For trees with code 1 (DBH), the actual measurement point may be found in Height to diameter measurement point."),
  diameter_height_code_name STRING OPTIONS(description="A code indicating the location at which diameter was measured. For trees with code 1 (DBH), the actual measurement point may be found in Height to diameter measurement point."),
  total_height INT64 OPTIONS(description="The total length (height) of a sample tree (in feet) from the ground to the tip of the apical meristem beginning in PLOT.MANUAL = 1.1. The total length of a tree is not always its actual length. If the main stem is broken, the actual length is measured or estimated and the missing piece is added to the actual length to estimate total length. The amount added is determined by measuring the broken piece if it can be located on the ground; otherwise it is estimated. The minimum height for timber species is 5 feet and for woodland species is 1 foot. Starting with PLOT.MANUAL = 7.0, the Core minimum diameter to qualify for a standing dead tree was changed from 5.0 inches to 1.0 inch."),
  height_method_code INT64 OPTIONS(description="A code indicating how length (height) was determined beginning in PLOT.MANUAL = 1.1. Starting with PLOT.MANUAL = 7.0, the Core minimum diameter to qualify for a standing dead tree was changed from 5.0 inches to 1.0 inch."),
  height_method_code_name STRING OPTIONS(description="A code indicating how length (height) was determined beginning in PLOT.MANUAL = 1.1. Starting with PLOT.MANUAL = 7.0, the Core minimum diameter to qualify for a standing dead tree was changed from 5.0 inches to 1.0 inch."),
  actual_height INT64 OPTIONS(description="The length (height) of the tree to the nearest foot from ground level to the highest remaining portion of the tree still present and attached to the bole. If ACTUALHT = HT, then the tree does not have a broken top. If ACTUALHT <HT, then the tree does have a broken or missing top. The minimum height for timber species is 5 feet and for woodland species is 1 foot. Starting with PLOT.MANUAL = 7.0, the Core minimum diameter to qualify for a standing dead tree was changed from 5.0 inches to 1.0 inch."),
  tree_class_code INT64 OPTIONS(description="A code indicating the general quality of the tree. In annual inventory, this is the tree class for both live and dead trees at the time of current measurement. In periodic inventory, for cut and dead trees, this is the tree class of the tree at the time it died or was cut. Therefore, cut and dead trees collected in periodic inventory can be coded as growing-stock trees."),
  tree_class_code_name STRING OPTIONS(description="A code indicating the general quality of the tree. In annual inventory, this is the tree class for both live and dead trees at the time of current measurement. In periodic inventory, for cut and dead trees, this is the tree class of the tree at the time it died or was cut. Therefore, cut and dead trees collected in periodic inventory can be coded as growing-stock trees."),
  compacted_crown_ratio INT64 OPTIONS(description="The percent of the tree bole supporting live, healthy foliage (the crown is ocularly compacted to fill in gaps) when compared to actual length (Actual Height). When PLOT.MANUAL <1.0 the variable may have been a code, which was converted to the midpoint of the ranges represented by the codes, and is stored as a percentage. May not be populated for periodic inventories."),
  crown_class_code INT64 OPTIONS(description="A code indicating the amount of sunlight received and the crown position within the canopy."),
  crown_class_code_name STRING OPTIONS(description="A code indicating the amount of sunlight received and the crown position within the canopy."),
  tree_grade_code INT64 OPTIONS(description="A code indicating the quality of sawtimber trees. This attribute is populated for live, growing-stock, sawtimber trees on subplots 1-4 where PLOT.MANUAL 1.0 for plots that are in a forest condition class. This attribute may be populated for other tree records that do not meet the above criteria. For example, it may be populated with the previous tree grade on dead and cut trees. Standards for tree grading are specific to species and differ slightly by research station. Only collected by certain FIA work units (SURVEY.RSCD = 23, 24, or 33). Tree grade codes range from 1 to 5."),
  cause_death_agent_code INT64 OPTIONS(description="When PLOT.MANUAL 1.0, this variable was collected on only dead and cut trees. When PLOT.MANUAL <1.0, this variable was collected on all trees (live, dead, and cut). Cause of damage was recorded for live trees if the presence of damage or pathogen activity was serious enough to reduce the quality or vigor of the tree. When a tree was damaged by more than one agent, the most severe damage was coded. When no damage was observed on a live tree, 00 was recorded. Damage recorded for dead trees was the cause of death. Each FIA program records specific codes that may differ from one State to the next. These codes fall within the ranges listed below. For the specific codes used in a particular State, contact the FIA work unit responsible for that State (table 1-1)."),
  cause_death_agent_code_name STRING OPTIONS(description="When PLOT.MANUAL 1.0, this variable was collected on only dead and cut trees. When PLOT.MANUAL <1.0, this variable was collected on all trees (live, dead, and cut). Cause of damage was recorded for live trees if the presence of damage or pathogen activity was serious enough to reduce the quality or vigor of the tree. When a tree was damaged by more than one agent, the most severe damage was coded. When no damage was observed on a live tree, 00 was recorded. Damage recorded for dead trees was the cause of death. Each FIA program records specific codes that may differ from one State to the next. These codes fall within the ranges listed below. For the specific codes used in a particular State, contact the FIA work unit responsible for that State (table 1-1)."),
  rotten_and_missing_cull INT64 OPTIONS(description="The percent of the cubic-foot volume in a live or dead tally tree that is rotten or missing. This is a calculated value that includes field-recorded cull (rotten missing cull field recorded) and any additional cull due to broken top."),
  damage_location_1 INT64 OPTIONS(description="A code indicating where damage (meeting or exceeding a severity threshold, as defined in the field guide) is present on the tree."),
  damage_location_1_name STRING OPTIONS(description="A code indicating where damage (meeting or exceeding a severity threshold, as defined in the field guide) is present on the tree"),
  damage_type_1 INT64 OPTIONS(description="A code indicating the kind of damage (meeting or exceeding a severity threshold, as defined in the field guide) present. If Damage location 1 = 0, then Damage type 1 = blank (null)."),
  damage_type_1_name STRING OPTIONS(description="A code indicating the kind of damage (meeting or exceeding a severity threshold, as defined in the field guide) present. If Damage location 1 = 0, then Damage type 1 = blank (null)."),
  damage_severity_1 INT64 OPTIONS(description="A code indicating how much of the tree is affected. Valid severity codes vary by damage type and damage location and must exceed a threshold value, as defined in the field guide. If Damage Location 1 = 0, then Damage severity 1 = blank (null)."),
  damage_severity_1_name STRING OPTIONS(description="A code indicating how much of the tree is affected. Valid severity codes vary by damage type and damage location and must exceed a threshold value, as defined in the field guide. If Damage Location 1 = 0, then Damage severity 1 = blank (null)."),
  damage_location_2 INT64 OPTIONS(description="A code indicating where secondary damage (meeting or exceeding a severity threshold, as defined in the field guide) is present. Use same codes as Damage location 1. If Damage location 1 = 0, then Damage location 2 = blank (null) or 0."),
  damage_location_2_name STRING OPTIONS(description="A code indicating where secondary damage (meeting or exceeding a severity threshold, as defined in the field guide) is present. Use same codes as Damage location 1. If Damage location 1 = 0, then Damage location 2 = blank (null) or 0."),
  damage_type_2 INT64 OPTIONS(description="A code indicating the kind of secondary damage (meeting or exceeding a severity threshold, as defined in the field guide) present. Use same codes as Damage type 1. If Damage location 1 = 0, then Damage type 2 = blank (null)."),
  damage_type_2_name STRING OPTIONS(description="A code indicating the kind of secondary damage (meeting or exceeding a severity threshold, as defined in the field guide) present. Use same codes as Damage type 1. If Damage location 1 = 0, then Damage type 2 = blank (null)."),
  damage_severity_2 INT64 OPTIONS(description="A code indicating how much of the tree is affected by the secondary damage. Valid severity codes vary by damage type and damage location and must exceed a threshold value, as defined in the field guide. Use same codes as Damage severity 1. If Damage location 1 = 0, then Damage severity 2 = blank (null)."),
  damage_severity_2_name STRING OPTIONS(description="A code indicating how much of the tree is affected by the secondary damage. Valid severity codes vary by damage type and damage location and must exceed a threshold value, as defined in the field guide. Use same codes as Damage severity 1. If Damage location 1 = 0, then Damage severity 2 = blank (null)."),
  decay_class_code INT64 OPTIONS(description="A code indicating the stage of decay that predominates along the recorded total length of the CWD piece. Decay class code is used to reduce biomass based on ratios stored in the REF_SPECIES table."),
  decay_class_code_name STRING OPTIONS(description="A code indicating the stage of decay that predominates along the recorded total length of the CWD piece. Decay class code is used to reduce biomass based on ratios stored in the REF_SPECIES table."),
  tree_stocking FLOAT64 OPTIONS(description="The stocking value computed for each live tree. Stocking values are computed using several specific species equations that were developed from normal yield tables and stocking charts. Resultant values are a function of diameter. The stocking of individual trees is used to calculate COND.GSSTK, COND.GSSTKCD, COND.ALSTK, and COND.ALSTKCD."),
  woodland_tree_species_stem_count INT64 OPTIONS(description="The number of live and dead stems used to calculate diameter on a woodland tree. Woodland species are identified in the REF_SPECIES table as REF_SPECIES.WOODLAND = X. These tree species have diameter measured at the root collar. For a stem to be counted, it must have a minimum stem size of 1 inch in diameter and 1 foot in length."),
  net_cubicfoot_volume FLOAT64 OPTIONS(description="For timber species (trees where the diameter is measured at breast height [DBH]), this is the net volume of wood in the central stem of a sample tree 5.0 inches in diameter, from a 1-foot stump to a minimum 4-inch top diameter, or to where the central stem breaks into limbs all of which are <4.0 inches in diameter. For woodland species, net cubicfoot volume is the net volume of wood and bark from the DRC measurement point(s) to a 1½-inch top diameter; includes branches that are at least 1½ inches in diameter along the length of the branch. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the Tree Net Growth, Removal, and Mortality Component Table table to obtain per acre information. This attribute is blank (null) for trees with DIA <5.0 inches. All trees measured after 1998 with DIA 5.0 inches (including standing dead trees) will have entries in this field. Does not include rotten, missing, and form cull."),
  gross_cubicfoot_volume FLOAT64 OPTIONS(description="For timber species (trees where the diameter is measured at breast height [DBH]), this is the net volume of wood in the central stem of a sample tree 5.0 inches in diameter, from a 1-foot stump to a minimum 4-inch top diameter, or to where the central stem breaks into limbs all of which are <4.0 inches in diameter. For woodland species, net cubicfoot volume is the net volume of wood and bark from the DRC measurement point(s) to a 1½-inch top diameter; includes branches that are at least 1½ inches in diameter along the length of the branch. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the Tree Net Growth, Removal, and Mortality Component Table table to obtain per acre information. This attribute is blank (null) for trees with DIA <5.0 inches. All trees measured after 1998 with DIA 5.0 inches (including standing dead trees) will have entries in this field. Does not include rotten, missing, and form cull."),
  net_cubicfoot_volume_sawlog_portion_sawtimber_tree FLOAT64 OPTIONS(description="The net volume of wood in the central stem of a timber species tree of sawtimber size (9.0 inches DIA minimum for softwoods, 11.0 inches DIA minimum for hardwoods), from a 1-foot stump to a minimum top diameter, (7.0 inches for softwoods, 9.0 inches for hardwoods) or to where the central stem breaks into limbs, all of which are less than the minimum top diameter. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the Tree Net Growth, Removal, and Mortality Component table to obtain per acre information. This attribute is blank (null) for softwood trees with DIA <9.0 inches (11.0 inches for hardwoods). All larger trees have entries in this field if they are growing-stock trees (tree class code = 2 and tree status code = 1). All rough and rotten trees (tree class code = 3 or 4) and dead and cut trees (tree status code = 2 or 3) are blank (null) in this field. Form cull and rotten/missing cull are excluded."),
  gross_cubicfoot_volume_sawlog_portion_sawtimber_tree FLOAT64 OPTIONS(description="This is the total volume of wood in the central stem of a timber species tree of sawtimber size (9.0 inches DIA minimum for softwoods, 11.0 inches DIA minimum for hardwoods), from a 1-foot stump to a minimum top diameter (7.0 inches for softwoods, 9.0 inches for hardwoods), or to where the central stem breaks into limbs, all of which are less than the minimum top diameter. This is a per tree value and must be multiplied by trees per acre unadjusted to obtain per acre information. This attribute is blank (null) for softwood trees with DIA <9.0 inches (11.0 inches for hardwoods). All larger trees have entries in this field if they are growing-stock trees (tree class code = 2 and tree status code = 1). All rough and rotten trees (tree class code = 3 or 4) and dead and cut trees (tree status code = 2 or 3) are blank (null) in this field."),
  net_boardfoot_volume_sawlog_portion_sawtimber_tree FLOAT64 OPTIONS(description="This is the net volume (International ¼-inch rule) of wood in the central stem of a timber species tree of sawtimber size (9.0 inches DIA minimum for softwoods, 11.0 inches DIA minimum for hardwoods), from a 1-foot stump to a minimum top diameter (7.0 inches for softwoods, 9.0 inches for hardwoods), or to where the central stem breaks into limbs all of which are less than the minimum top diameter. This is a per tree value and must be multiplied by trees per acre unadjusted to obtain per unit area information. This attribute is blank (null) for softwood trees with DIA <9.0 inches (11.0 inches for hardwoods). All larger trees should have entries in this field if they are growing-stock trees (tree class code = 2 and tree status code = 1). All rough and rotten trees (tree class code = 3 or 4) and dead and cut trees (tree status code = 2 or 3) are blank (null) in this field. Form cull and rotten/missing cull are excluded."),
  gross_boardfoot_volume_sawlog_portion_sawtimber_tree FLOAT64 OPTIONS(description="This is the total volume (International ¼-inch rule) of wood in the central stem of a timber species tree of sawtimber size (9.0 inches DIA minimum for softwoods, 11.0 inches DIA minimum for Chapter 3 (revision: 03.2017) Tree Table FIA Database Description and User Guide for Phase 2 (version: 7.0) 3-19 hardwoods), from a 1-foot stump to a minimum top diameter (7.0 inches for softwoods, 9.0 inches for hardwoods), or to where the central stem breaks into limbs all of which are less than the minimum top DIA. This is a per tree value and must be multiplied by trees per acre unadjusted to obtain per unit area information. This attribute is blank (null) for softwood trees with DIA <9.0 inches (11.0 inches for hardwoods). All larger trees should have entries in this field if they are growing-stock trees (tree class code = 2 and tree status code = 1). All rough and rotten trees (tree class code = 3 or 4) and dead and cut trees (tree status code = 2 or 3) are blank (null) in this field."),
  sound_cubicfoot_volume FLOAT64 OPTIONS(description="For timber species (trees where the diameter is measured at breast height [DBH]), the volume of sound wood in the central stem of a sample tree 5.0 inches in diameter from a 1-foot stump to a minimum 4-inch top diameter or to where the central stem breaks into limbs all of which are <4.0 inches in diameter. For woodland species (woodland species can be identified by REF_SPECIES.WOODLAND = X), sound cubicfoot volume is the net volume of wood and bark from the DRC measurement point(s) to a minimum 1½-inch top diameter; includes branches that are at least 1½ inches in diameter along the length of the branch. This is a per tree value and must be multiplied by trees per acre unadjusted to obtain per acre information. This attribute is blank (null) for trees with DIA <5.0 inches. All trees with DIA 5.0 inches (including dead trees) have entries in this field. Does not include rotten and missing cull (volume loss due to rotten and missing cull defect has been deducted)."),
  net_annual_merchantable_cubicfoot_growth_growingstock_tree_timberland FLOAT64 OPTIONS(description="The net change in cubic-foot volume (net cubicfoot volume) per year of this tree (for trees on remeasured plots, (V2 - V1)/(T2 - T1)where 1 and 2 denote the past and current measurement, respectively, V is volume, and T indicates year of measurement, and T2 - T1 = PLOT.REMPER). Because this value is net growth, it may be a negative number. Negative growth values are usually due to mortality (V2 = 0) but can also occur on live trees that have a net loss in volume because of damage, rot, broken top, or other causes. To expand to a per acre value, multiply by growth trees per acre unadjusted."),
  net_annual_merchantable_boardfoot_growth_sawtimber_tree_timberland FLOAT64 OPTIONS(description="The net change in merchantable board-foot (net boardfoot volume sawlog portion sawtimber tree, International ¼-inch rule) volume per year of this tree (for trees on remeasured plots, (V2 - V1)/(T2 -T1)). Because this value is net growth, it may be a negative number. Negative growth values are usually due to mortality (V2 = 0) but can also occur on live trees that have a net loss in volume because of damage, rot, broken top, or other causes. To expand to a per acre value, multiply by growth trees per acre unadjusted."),
  net_annual_sound_cubicfoot_growth_live_tree_timberland FLOAT64 OPTIONS(description="The net change in sound cubic-foot volume (sound cubicfoot volume) per year of the tree (for trees on remeasured plots, (V2 -V1)/(T2 -T1)). Because this value is net growth, it may be a negative number. Negative growth values are usually due to mortality (V2 = 0) but can also occur on live trees that have a net loss in volume because of damage, rot, broken top, or other causes. To expand to a per acre value, multiply by growth trees per acre unadjusted."),
  merchantable_cubicfoot_volume_growingstock_tree_timberland_mortality_purposes FLOAT64 OPTIONS(description="The merchantable cubic-foot volume (Net cubic-foot volume at the midpoint) of the tree at the time of mortality. To obtain estimates of annual per acre mortality, multiply by Mortality trees per acre per year unadjusted."),
  merchantable_boardfoot_volume_sawtimber_tree_timberland_mortality_purposes FLOAT64 OPTIONS(description="The merchantable board-foot (net boardfoot volume sawlog portion sawtimber tree, International ¼-inch rule) volume of the tree at the time of mortality. To obtain estimates of annual per acre mortality, multiply by removal trees per acre per year unadjusted."),
  sound_cubicfoot_volume_tree_timberland_mortality_purposes FLOAT64 OPTIONS(description="The sound cubic-foot volume (sound cubicfoot volume) of the tree at the time of mortality. To obtain estimates of annual per acre mortality, multiply by mortality trees per acre per year unadjusted."),
  merchantable_cubicfoot_volume_growingstock_tree_timberland_removal_purposes FLOAT64 OPTIONS(description="The merchantable cubic-foot volume (Net cubic-foot volume at the midpoint) of the tree at the time of removal. To obtain estimates of annual per acre removals, multiply by removal trees per acre per year unadjusted."),
  merchantable_boardfoot_volume_sawtimber_tree_timberland_removal_purposes FLOAT64 OPTIONS(description="The merchantable board-foot (net boardfoot volume sawlog portion sawtimber tree, International ¼-inch rule) volume of the tree at the time of removal. To obtain estimates of annual per acre removals, multiply by removal trees per acre per year unadjusted."),
  sound_cubicfoot_volume_live_tree_timberland_removal_purposes FLOAT64 OPTIONS(description="The sound cubic-foot volume (sound cubicfoot volume) of the tree at the time of removal. To obtain estimates of annual per acre removals, multiply by removal trees per acre per year unadjusted."),
  diameter_check_code INT64 OPTIONS(description="A code indicating the reliability of the diameter measurement."),
  diameter_check_code_name STRING OPTIONS(description="A code indicating the reliability of the diameter measurement."),
  mortality_year INT64 OPTIONS(description="The estimated year in which a remeasured tree died or was cut. Populated where PLOT.MANUAL 1.0 and populated by some FIA work units where PLOT.MANUAL <1.0."),
  salvable_dead_code INT64 OPTIONS(description="A standing or down dead tree considered merchantable by regional standards. Contact the appropriate FIA work unit for information on how this code is assigned for a particular State (table 1-1)."),
  salvable_dead_code_name STRING OPTIONS(description="A standing or down dead tree considered merchantable by regional standards. Contact the appropriate FIA work unit for information on how this code is assigned for a particular State (table 1-1)."),
  uncompacted_live_crown_ratio INT64 OPTIONS(description="Percentage determined by dividing the live crown length by the actual tree length. When PLOT.MANUAL <3.0 the variable was a code, which was converted to the midpoint of the ranges represented by the codes, and is stored as a percentage."),
  crown_position_code INT64 OPTIONS(description="The relative position of each tree in relation to the overstory canopy."),
  crown_position_code_name STRING OPTIONS(description="The relative position of each tree in relation to the overstory canopy."),
  crown_light_exposure_code INT64 OPTIONS(description="A code indicating the amount of light being received by the tree crown. Collected for all live trees at least 5 inches DBH/DRC. Trees with Uncompacted Live Crown Ratio <35 have a maximum Crown Light Exposure Code of 1."),
  crown_light_exposure_code_name STRING OPTIONS(description="A code indicating the amount of light being received by the tree crown. Collected for all live trees at least 5 inches DBH/DRC. Trees with Uncompacted Live Crown Ratio <35 have a maximum Crown Light Exposure Code of 1."),
  crown_vigor_code_sapling INT64 OPTIONS(description="A code indicating the vigor of sapling crowns. Collected for live trees between 1 and 4.9 inches DBH/DRC."),
  crown_vigor_code_sapling_name STRING OPTIONS(description="A code indicating the vigor of sapling crowns. Collected for live trees between 1 and 4.9 inches DBH/DRC."),
  crown_density_code INT64 OPTIONS(description="A code indicating how dense the tree crown is, estimated in percent classes. Collected for all live trees at least 5 inches DBH/DRC. Crown density is the amount of crown branches, foliage and reproductive structures that blocks light visibility through the crown."),
  crown_density_code_name STRING OPTIONS(description="A code indicating how dense the tree crown is, estimated in percent classes. Collected for all live trees at least 5 inches DBH/DRC. Crown density is the amount of crown branches, foliage and reproductive structures that blocks light visibility through the crown."),
  crown_dieback_code INT64 OPTIONS(description="A code indicating the amount of recent dead material in the upper and outer portion of the crown, estimated in percent classes. Collected for all live trees at least 5 inches DBH/DRC."),
  crown_dieback_code_name STRING OPTIONS(description="A code indicating the amount of recent dead material in the upper and outer portion of the crown, estimated in percent classes. Collected for all live trees at least 5 inches DBH/DRC."),
  foliage_transparency_code INT64 OPTIONS(description="A code indicating the amount of light penetrating the foliated portion of the crown, estimated in percent classes. Collected for all live trees at least 5 inches DBH/DRC."),
  foliage_transparency_code_name STRING OPTIONS(description="A code indicating the amount of light penetrating the foliated portion of the crown, estimated in percent classes. Collected for all live trees at least 5 inches DBH/DRC."),
  tree_history_code INT64 OPTIONS(description="Identifies the tree with detailed information as to whether the tree is live, dead, cut, removed due to land use change, etc. Contact the appropriate FIA work unit for the definitions (table 1-1). Only collected by certain FIA work units (SURVEY.RSCD = 23, 24, or 33)."),
  current_diameter_calculated FLOAT64 OPTIONS(description="If the diameter is unmeasurable (e.g., the tree is cut or dead), the diameter is calculated (in inches) and stored in this attribute."),
  breast_height_age INT64 OPTIONS(description="The age of a live tree derived from counting tree rings from an increment core sample extracted at a height of 4.5 feet above ground. Breast height age is collected for a subset of trees and only for trees that the diameter is measured at breast height (DBH). This data item is used to calculate classification attributes such as stand age. For PNWRS, one tree is sampled for BHAGE for each species, within each crown class, and for each condition class present on a plot. Age of saplings (<5.0 inches DBH) may be aged by counting branch whorls above 4.5 feet. No timber hardwood species other than red alder are bored for age. For RMRS, one tree is sampled for each species and broad diameter class present on a plot. Only collected by certain FIA work units (SURVEY.RSCD = 22 or 26) and is left blank (null) when it is not collected."),
  total_age INT64 OPTIONS(description="The age of a live tree derived either from counting tree rings from an increment core sample extracted at the base of a tree where diameter is measured at root collar (DRC), or for small saplings (1.0 to 2.9 inches DBH) by counting all branch whorls, or by adding a species-dependent number of years to breast height age. Total age is collected for a subset of trees and is used to calculate classification attributes such as stand age. Only collected by certain FIA work units (SURVEY.RSCD = 22 or 26) and is left blank (null) when it is not collected."),
  dead_cull INT64 OPTIONS(description="The percent of the gross cubic-foot volume that is cull due to sound dead material. Recorded for all trees that are at least 5.0 inches in diameter. Only collected by certain FIA work units (SURVEY.RSCD = 22). This attribute is blank (null) for trees smaller than 5 inches and is always null for the other FIA work units."),
  form_cull INT64 OPTIONS(description="The percent of the gross cubic-foot volume that is cull due to form defect. Recorded for live trees that are at least 5.0 inches DBH. Only collected by certain FIA work units (SURVEY.RSCD = 22). This attribute is blank (null) for dead trees, trees smaller than 5 inches DBH, for all trees where the diameter is measured at root collar (DRC), and is always null for the other FIA work units."),
  missing_top_cull_field_recorded INT64 OPTIONS(description="The percent of the gross cubic-foot volume that is cull due to a missing (broken) merchantable top. Recorded for trees that are at least 5.0 inches in diameter. The volume estimate does not include any portion of the missing top that is <4.0 inches DOB (diameter outside bark). Many broken top trees may have 0 percent missing top cull because no merchantable volume was lost. Only collected by certain FIA work units (SURVEY.RSCD = 22). This attribute is blank (null) for trees smaller than 5 inches diameter and is always null for the other FIA work units."),
  boardfoot_cull INT64 OPTIONS(description="The percent of the gross board-foot volume that is cull due to rot or form. Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  cubicfoot_cull INT64 OPTIONS(description="The percent of the gross cubic-foot volume that is cull due to rot or form. Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  boardfootcull_soundness INT64 OPTIONS(description="The percent of the board-foot cull that is sound (due to form). Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  cubicfootcull_soundness INT64 OPTIONS(description="The percent of the cubic-foot cull that is sound (due to form). Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  sawlog_height INT64 OPTIONS(description="The length (height) of a tree, recorded to a 7-inch top (9-inch for hardwoods), where at least one 8-foot log, merchantable or not, is present. On broken topped trees, sawlog length is recorded to the point of the break. Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  bole_height INT64 OPTIONS(description="The length between the 1-foot stump and the 4.0-inch top diameter of outside bark (DOB), where at least one 4-foot section is present. In periodic inventories, this attribute was measured in the field. For annual inventories, this attribute is a calculated, modeled value. Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  form_class INT64 OPTIONS(description="A code used in calculating merchantable bole net volume. Recorded for all live hardwood trees tallied that are 5.0 inch DBH/DRC. Also recorded for conifers 5.0 inch DBH in Region 5 National Forests. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  form_class_name STRING OPTIONS(description="A code used in calculating merchantable bole net volume. Recorded for all live hardwood trees tallied that are 5.0 inch DBH/DRC. Also recorded for conifers 5.0 inch DBH in Region 5 National Forests. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  current_height_calculated INT64 OPTIONS(description="If the height is unmeasurable (e.g., the tree is cut or dead), the height is calculated (in feet) and stored in this attribute. Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  hardwood_clump_code INT64 OPTIONS(description="A code sequentially assigned to each hardwood clump within each species as they are found on a subplot. Up to 9 hardwood clumps can be identified and coded within each species on each subplot. A clump is defined as having 3 or more live stems originating from a common point on the root system. Woodland hardwood species are not evaluated for clump code. Clump code data are used to adjust stocking estimates since trees growing in clumps contribute less to stocking than do individual trees. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  calculated_site_index INT64 OPTIONS(description="Site index is calculated for dominant and co-dominant trees using one of several methods (see METHOD). It is expressed as height in feet that the tree is expected to attain at a base- or reference age (see SIBASE). Most commonly, site index is calculated using a family of curves that show site index as a function of total length and either breast-height age or total age. The height-intercept (or growth-intercept) method is commonly used for young trees or species that produce conspicuous annual branch whorls; using this method, site index is calculated with the height growth attained for a short period (usually 3 to 5 years) after the tree has reached breast height. Neither age nor total length determination are necessary when using the height-intercept method, so one or more of those variables may be null for a site tree on which the height-intercept method was used."),
  tree_created_by INT64 OPTIONS(description="The employee who created the record. This attribute is intentionally left blank in download files."),
  tree_created_date DATE OPTIONS(description="The date the record was created."),
  tree_created_in_instance INT64 OPTIONS(description="The database instance in which the record was created. Each computer system has a unique database instance code and this attribute stores that information to determine on which computer the record was created."),
  tree_modified_by INT64 OPTIONS(description="The employee who modified the record. This field will be blank (null) if the data have not been modified since initial creation. This attribute is intentionally left blank in download files."),
  tree_modified_date DATE OPTIONS(description="The date the record was last modified. This field will be blank (null) if the data have not been modified since initial creation."),
  tree_modified_in_instance INT64 OPTIONS(description="The database instance in which the record was modified. This field will be blank (null) if the data have not been modified since initial creation."),
  mortality_code INT64 OPTIONS(description="Used for a tree that was alive within past 5 years, but has died. Not populated for standing dead trees <5.0 inches in diameter when PLOT.MANUAL <7.0."),
  mortality_code_name STRING OPTIONS(description="Used for a tree that was alive within past 5 years, but has died. Not populated for standing dead trees <5.0 inches in diameter when PLOT.MANUAL <7.0."),
  height_to_diameter_measurement_point FLOAT64 OPTIONS(description="For trees measured directly at 4.5 feet above ground, this item is blank (null). If the diameter is not measured at 4.5 feet, the actual length from the ground, to the nearest 0.1 foot, at which the diameter was measured for each tally tree, 1.0-inch DBH and larger."),
  rough_cull INT64 OPTIONS(description="Percentage of sound dead cull, as a percent of the merchantable bole/portion of the tree."),
  mistletoe_class_code INT64 OPTIONS(description="A rating of dwarf mistletoe infection. Recorded on all live conifer species except juniper. Using the Hawksworth (1979) six-class rating system, the live crown is divided into thirds, and each third is rated using the following scale: 0 is for no visible infection, 1 for <50 percent of branches infected, 2 for >50 percent of branches infected. The ratings for each third are summed together to yield the Hawksworth rating."),
  mistletoe_class_code_name STRING OPTIONS(description="A rating of dwarf mistletoe infection. Recorded on all live conifer species except juniper. Using the Hawksworth (1979) six-class rating system, the live crown is divided into thirds, and each third is rated using the following scale: 0 is for no visible infection, 1 for <50 percent of branches infected, 2 for >50 percent of branches infected. The ratings for each third are summed together to yield the Hawksworth rating."),
  rotten_missing_cull_field_recorded INT64 OPTIONS(description="The percentage rotten or missing cubic-foot cull volume, estimated to the nearest 1 percent. This estimate does not include any cull estimate above actual length; therefore volume lost from a broken top is not included (see CULL for percent cull including cull from broken top). When field crews estimate volume loss (tree cull), they only consider the cull on the merchantable bole/portion of the tree, from a 1-foot stump to a 4-inch top diameter outside bark (DOB). For woodland species, the merchantable portion is between the point of DRC measurement to a 1.5-inch top DOB"),
  reconcile_code INT64 OPTIONS(description="Recorded for remeasurement locations only. A code indicating the reason a tree either enters or is no longer a part of the inventory."),
  reconcile_code_name STRING OPTIONS(description="Recorded for remeasurement locations only. A code indicating the reason a tree either enters or is no longer a part of the inventory."),
  previous_diameter FLOAT64 OPTIONS(description="previous_diameter"),
  net_annual_merchantable_cubicfoot_growth_growingstock_tree_forest_land FLOAT64 OPTIONS(description="The net change in merchantable cubic-foot volume (net cubicfoot volume) per year of the tree (for trees on remeasured plots, (V2 - V1)/(T2 - T1) where 1 and 2 denote the past and current measurement, respectively, V is volume, T indicates date of measurement, and T2 - T1 = PLOT.REMPER). Because this value is net growth, it may be a negative number. Negative growth values are usually due to mortality (V2 = 0) but can also occur on live trees that have a net loss in volume because of damage, rot, broken top, or other causes. To expand to a per acre value, multiply by growth trees per acre unadjusted."),
  net_annual_merchantable_boardfoot_growth_sawtimber_tree_forest_land FLOAT64 OPTIONS(description="The net change in merchantable board-foot (net boardfoot volume sawlog portion sawtimber tree, International ¼-inch rule) volume per year of the tree (for trees on remeasured plots, (V2 - V1)/(T2 - T1)). Because this value is net growth, it may be a negative number. Negative growth values are usually due to mortality (V2 = 0) but can also occur on live trees that have a net loss in volume because of damage, rot, broken top, or other causes. To expand to a per acre value, multiply by growth trees per acre unadjusted."),
  net_annual_sound_cubicfoot_growth_live_tree_forest_land FLOAT64 OPTIONS(description="The net change in sound cubic-foot volume (sound cubicfoot volume) per year of the tree (for trees on remeasured plots (V2 - V1)/(T2 -T1)). Because this value is net growth, it may be a negative number. Negative growth values are usually due to mortality (V2 = 0) but can also occur on live trees that have a net loss in volume because of damage, rot, broken top, or other causes. To expand to a per acre value, multiply by growth trees per acre unadjusted."),
  merchantable_cubicfoot_volume_growingstock_tree_forest_land_mortality_purposes FLOAT64 OPTIONS(description="The merchantable cubic-foot volume (Net cubic-foot volume at the midpoint) of the tree at the time of mortality. To obtain estimates of annual per acre mortality, multiply by removal trees per acre per year unadjusted."),
  merchantable_boardfoot_volume_sawtimber_tree_forest_land_mortality_purposes FLOAT64 OPTIONS(description="The merchantable board-foot (net boardfoot volume sawlog portion sawtimber tree, International ¼-inch rule) volume of the tree at time of mortality. To obtain estimates of annual per acre mortality, multiply by mortality trees per acre per year unadjusted."),
  sound_cubicfoot_volume_tree_forest_land_mortality_purposes FLOAT64 OPTIONS(description="The sound cubic-foot volume (sound cubicfoot volume) of the tree at the time of mortality. To obtain estimates of annual per acre mortality, multiply by mortality trees per acre per year unadjusted."),
  merchantable_cubicfoot_volume_growingstock_tree_forest_land_removal_purposes FLOAT64 OPTIONS(description="The merchantable cubic-foot volume of the tree at the time of removal. To obtain estimates of annual per acre removals, multiply by removal trees per acre per year unadjusted."),
  merchantable_boardfoot_volume_sawtimber_tree_forest_land_removal_purposes FLOAT64 OPTIONS(description="The merchantable board-foot (net boardfoot volume sawlog portion sawtimber tree, International ¼-inch rule) volume of the tree at the time of removal. To obtain estimates of annual per acre removals, multiply by removal trees per acre per year unadjusted."),
  sound_cubicfoot_volume_live_tree_forest_land_removal_purposes FLOAT64 OPTIONS(description="The sound cubic-foot volume (sound cubicfoot volume) of the tree at the time of removal. To obtain estimates of annual per acre removals, multiply by removal trees per acre per year unadjusted."),
  periodic_annual_growth_removal_mortality_flag STRING OPTIONS(description="A code indicating if this subplot is part of a periodic inventory (usually from a variable-radius plot design) that is only included for the purposes of computing growth, removals and/or mortality estimates. Tree data associated with this subplot does not contribute to current estimates of such attributes as volume, biomass or number of trees. The flag is set to Y for those subplots that are needed for estimation and otherwise is left blank (null)."),
  tree_class_code_northeastern_research_station INT64 OPTIONS(description="In annual inventory, this code represents a classification of the overall quality of a tree that is 5.0 inches DBH and larger. It classifies the quality of a sawtimber tree based on the present condition, or it classifies the quality of a poletimber tree as a prospective determination (i.e., a forecast of potential quality when and if the tree becomes sawtimber size). For more detailed description, see the regional field guide. Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  tree_class_code_northeastern_research_station_name STRING OPTIONS(description="In annual inventory, this code represents a classification of the overall quality of a tree that is 5.0 inches DBH and larger. It classifies the quality of a sawtimber tree based on the present condition, or it classifies the quality of a poletimber tree as a prospective determination (i.e., a forecast of potential quality when and if the tree becomes sawtimber size). For more detailed description, see the regional field guide. Only collected by certain FIA work units (SURVEY.RSCD = 24)."),
  tree_class_code_southern_research_station INT64 OPTIONS(description="A code indicating the general quality of the tree. Prior to the merger of the Southern and Southeastern Research Stations (INVYR 1997), a growing-stock classification (code 2) was only assigned to species that were considered to have commercial value. Since the merger (INVYR >1997), code 2 has been applied to all tree species meeting the growing-stock form, grade, size and soundness requirements, regardless of commercial value. Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  tree_class_code_southern_research_station_name STRING OPTIONS(description="A code indicating the general quality of the tree. Prior to the merger of the Southern and Southeastern Research Stations (INVYR 1997), a growing-stock classification (code 2) was only assigned to species that were considered to have commercial value. Since the merger (INVYR >1997), code 2 has been applied to all tree species meeting the growing-stock form, grade, size and soundness requirements, regardless of commercial value. Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  tree_class_code_north_central_research_station INT64 OPTIONS(description="In annual inventory, a code indicating tree suitability for timber products, or the extent of decay in the butt section of down-dead trees. It is recorded on live standing, standing-dead, and down dead trees that are 1.0 inches DBH and larger. Tree class is basically a check for the straightness and soundness of the sawlog portion on a sawtimber tree or the potential sawlog portion on a poletimber tree or sapling. \"Sawlog portion\" is defined as the length between the 1-foot stump and the 9.0-inch top diameter of outside bark, DOB, for hardwoods, or the 7.0-inch top DOB for softwoods. For more detailed description, see the regional field guide located at the NRS Data Collection web page (http://www.nrs.fs.fed.us/fia/data-collection/). Only collected by certain FIA work units (SURVEY.RSCD = 23)."),
  tree_class_code_north_central_research_station_name STRING OPTIONS(description="In annual inventory, a code indicating tree suitability for timber products, or the extent of decay in the butt section of down-dead trees. It is recorded on live standing, standing-dead, and down dead trees that are 1.0 inches DBH and larger. Tree class is basically a check for the straightness and soundness of the sawlog portion on a sawtimber tree or the potential sawlog portion on a poletimber tree or sapling. \"Sawlog portion\" is defined as the length between the 1-foot stump and the 9.0-inch top diameter of outside bark, DOB, for hardwoods, or the 7.0-inch top DOB for softwoods. For more detailed description, see the regional field guide located at the NRS Data Collection web page (http://www.nrs.fs.fed.us/fia/data-collection/). Only collected by certain FIA work units (SURVEY.RSCD = 23)."),
  tree_class_code_rocky_mountain_research_station INT64 OPTIONS(description="A code indicating the general quality of the tree. Only collected by certain FIA work units (SURVEY.RSCD = 22)."),
  tree_class_code_rocky_mountain_research_station_name STRING OPTIONS(description="A code indicating the general quality of the tree. Only collected by certain FIA work units (SURVEY.RSCD = 22)."),
  standing_dead_code INT64 OPTIONS(description="A code indicating if a tree qualifies as standing dead. To qualify as a standing dead tally tree, the dead tree must be at least 1.0 inch in diameter, have a bole that has an unbroken actual length of at least 4.5 feet, and lean less than 45 degrees from vertical as measured from the base of the tree to 4.5 feet. Populated where PLOT.MANUAL 2.0; may be populated using information collected on dead trees in earlier inventories for dead trees. For woodland species with multiple stems, a tree is considered down if more than 2/3 of the volume is no longer attached or upright; cut and removed volume is not considered. For woodland species with single stems to qualify as a standing dead tally tree, dead trees must be at least 1.0 inch in diameter, be at least 1.0 foot in unbroken ACTUAL LENGTH, and lean less than 45 degrees from vertical."),
  standing_dead_code_name STRING OPTIONS(description="A code indicating if a tree qualifies as standing dead. To qualify as a standing dead tally tree, the dead tree must be at least 1.0 inch in diameter, have a bole that has an unbroken actual length of at least 4.5 feet, and lean less than 45 degrees from vertical as measured from the base of the tree to 4.5 feet. Populated where PLOT.MANUAL 2.0; may be populated using information collected on dead trees in earlier inventories for dead trees. For woodland species with multiple stems, a tree is considered down if more than 2/3 of the volume is no longer attached or upright; cut and removed volume is not considered. For woodland species with single stems to qualify as a standing dead tally tree, dead trees must be at least 1.0 inch in diameter, be at least 1.0 foot in unbroken ACTUAL LENGTH, and lean less than 45 degrees from vertical."),
  previous_tree_status_code INT64 OPTIONS(description="Tree status that was recorded at the previous inventory on all tally trees 1.0 inch in diameter."),
  previous_tree_status_code_name STRING OPTIONS(description="Tree status that was recorded at the previous inventory on all tally trees 1.0 inch in diameter."),
  previous_woodland_stem_count STRING OPTIONS(description="Woodland tree species stem count that was recorded at the previous inventory."),
  trees_per_acre_unadjusted FLOAT64 OPTIONS(description="The number of seedlings per acre that the seedling count theoretically represents based on the sample design. For fixed-radius plots taken with the mapped plot design (PLOT.DESIGNCD =1), TPA_UNADJ equals 74.965282 times the number of seedlings counted. For plots taken with other sample designs, this attribute may be blank (null). Based on the procedures described in Bechtold and Patterson (2005), this attribute can be adjusted using factors stored in the POP_STRATUM table to derive population estimates. Examples of estimating population totals are shown in The Forest Inventory and Analysis Database: Population Estimation User Guide (Edition: March, 2017)."),
  mortality_trees_per_acre_per_year_unadjusted FLOAT64 OPTIONS(description="The number of mortality trees per acre per year that the sample tree theoretically represents based on the sample design. For fixed-radius plots taken with the mapped plot design (PLOT.DESIGNCD =1), TPAMORT_UNADJ is set to a constant derived from the plot size divided by PLOT.REMPER. Variable-radius plots were often used in earlier inventories, so the value in TPAMORT_UNADJ decreases as the tree diameter increases. This attribute will be blank (null) if the tree does not contribute to mortality estimates. Based on the procedures described in Bechtold and Patterson (2005), this attribute must be adjusted using factors stored in the POP_STRATUM table to derive population estimates. Examples of estimating population totals are shown in The Forest Inventory and Analysis Database: Population Estimation User Guide (Edition: March, 2017)."),
  removal_trees_per_acre_per_year_unadjusted FLOAT64 OPTIONS(description="The number of removal trees per acre per year that the sample tree theoretically represents based on the sample design. Forfixed-radius plots taken with the mapped plot design (PLOT.DESIGNCD =1), Removal trees per acre per year unadjusted is set to a constant derived from the plot size divided by PLOT.REMPER. Variable-radius plots were often used in earlier inventories, so the value in removal trees per acre per year unadjusted decreases as the tree diameter increases. This attribute will be blank(null) if the tree does not contribute to removals estimates. Based on the procedures described in Bechtold and Patterson (2005), this attribute must be adjusted using factors stored in the Population Stratum Table table to derive population estimates. Examples of estimating population totals are shown in The Forest Inventory and Analysis Database: Population Estimation User Guide (Edition: March, 2017)."),
  growth_trees_per_acre_unadjusted FLOAT64 OPTIONS(description="The number of growth trees per acre that the sample tree theoretically represents based on the sample design. For fixed-radius plots taken with the mapped plot design (PLOT.DESIGNCD = 1), Growth trees per acre unadjusted is set to a constant derived from the plot size. Variable-radius plots were often used in earlier inventories, so the value in Growth trees per acre unadjusted decreases as the tree diameter increases. This attribute will be blank (null) if the tree does not contribute to growth estimates. Based on the procedures described in Bechtold and Patterson (2005), this attribute must be adjusted using factors stored in the Population Stratum Table table to derive population estimates. Examples of estimating population totals are shown in The Forest Inventory and Analysis Database: Population Estimation User Guide (Edition: March, 2017)."),
  dry_biomass_in_the_merchantable_bole FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) in the merchantable bole of timber species [trees where diameter is measured at breast height (DBH)] 5.0 inches in diameter. This is the biomass of sound wood in live and dead trees, including bark, from a 1-foot stump to a minimum 4-inch top diameter of the central stem. This is a per tree value and must be multiplied by Trees per acre unadjusted to obtain per acre information. This attribute is blank (null) for timber species with DIA <5.0 inches and for woodland species. See Aboveground dry biomass woodland tree species for biomass of woodland species and Aboveground dry biomass of saplings for biomass of timber species with DIA <5.0 inches. For dead or cut timber trees, this number represents the biomass at the time of death or last measurement. Dry biomass in the merchantable bole is based on Sound cubic-foot volume at the midpoint and specific gravity information derived by the Forest Products Lab and others (values stored in the Reference Species table)."),
  dry_biomass_top_limbs_tree FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) in the top and branches (combined) of timber species [trees where diameter is measured at breast height (DBH)] 5.0 inches in diameter. Dry biomass top limbs tree includes the tip, the portion of the stem above the merchantable bole (i.e., above the 4-inch top diameter), and all branches; excludes foliage. Estimated for live and dead trees. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the Tree Net Growth, Removal, and Mortality Component Table  table to obtain per acre information. For dead or cut trees, this number represents the biomass at the time of death or last measurement. This attribute is blank for timber species with DIA <5.0 inches and for woodland species. See aboveground dry biomass woodland tree species for biomass of woodland species, and aboveground dry biomass saplings for biomass of timber species with DIA <5.0 inches. Appendix M contains equations used to estimate biomass components in the FIADB."),
  dry_biomass_tree_stump_at_t_1 FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) in the top and branches (combined) of timber species [trees where diameter is measured at breast height (DBH)] 5.0 inches in diameter. Dry biomass top limbs tree includes the tip, the portion of the stem above the merchantable bole (i.e., above the 4-inch top diameter), and all branches; excludes foliage. Estimated for live and dead trees. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the Tree Net Growth, Removal, and Mortality Component Table  table to obtain per acre information. For dead or cut trees, this number represents the biomass at the time of death or last measurement. This attribute is blank for timber species with DIA <5.0 inches and for woodland species. See aboveground dry biomass woodland tree species for biomass of woodland species, and aboveground dry biomass saplings for biomass of timber species with DIA <5.0 inches. Appendix M contains equations used to estimate biomass components in the FIADB."),
  aboveground_dry_biomass_saplings FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) of the aboveground portion, excluding foliage, of live trees with a diameter from 1.0 to 4.9 inches. Calculated for timber species only. The biomass of saplings is based on biomass computed from Jenkins and others (2003), using the observed diameter and an adjustment factor. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the TREE_GRM_COMPONENT table to obtain per acre information. Appendix M contains equations used to estimate biomass components in the FIADB."),
  aboveground_dry_biomass_woodland_tree_species FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) of the aboveground portion of a live or dead tree, excluding foliage, the tree tip Tree Net Growth, Removal, and Mortality Begin Table Chapter 3 (revision: 03.2017) 3-94 FIA Database Description and User Guide for Phase 2 (version: 7.0) (top of the tree above 1½ inches in diameter), and a portion of the stump from ground to diameter at root collar (DRC). Calculated for woodland species (trees where diameter is measured at DRC) with a diameter 1.0 inch. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the TREE_GRM_COMPONENT table to obtain per acre information. This attribute is blank (null) for woodland species with DIA <1.0 inch and for all timber species. Appendix M contains equations used to estimate biomass components in the FIADB."),
  belowground_dry_biomass FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) of the aboveground portion of a tree. This is a modeled estimate, calculated on live trees with a diameter of 1.0 inch, for both timber and woodland species. This is a per tree value and must be multiplied by the appropriate trees per acre expansion factor found in the TREE_GRM_COMPONENT table to obtain per acre information. Appendix M contains equations used to estimate biomass components in the FIADB."),
  aboveground_carbon FLOAT64 OPTIONS(description="The carbon (pounds) in the aboveground portion, excluding foliage, of live trees with a diameter 1.0 inch, and dead trees with a diameter 5.0 inches. Calculated for both timber and woodland species. This is a per tree value and must be multiplied by TPA_UNADJ to obtain per acre information. Carbon is assumed to be one-half the value of biomass and is derived by summing the aboveground biomass estimates and multiplying by 0.5 as follows: CARBON_AG = 0.5 * (DRYBIO_BOLE + DRYBIO_STUMP + DRYBIO_TOP + DRYBIO_SAPLING + DRYBIO_WDLD_SPP)"),
  belowground_carbon FLOAT64 OPTIONS(description="The carbon (pounds) of coarse roots >0.1 inch in root diameter. Calculated for live trees with a diameter 1.0 inch, and dead trees with a diameter 5.0 inches, for both timber and woodland species. This is a per tree value and must be multiplied by TPA_UNADJ to obtain per acre information. Carbon is assumed to be one-half the value of belowground biomass as follows: Belowground carbon = 0.5 * Belowground dry biomass"),
  tree_inventory_cycle_number INT64 OPTIONS(description="A number assigned to a set of plots, measured over a particular period of time from which a State estimate using all possible plots is obtained. A cycle number >1 does not necessarily mean that information for previous cycles resides in the database. A cycle is relevant for periodic and annual inventories."),
  tree_inventory_subcycle_number INT64 OPTIONS(description="For an annual inventory that takes n years to measure all plots, subcycle shows in which of the n years of the cycle the data were measured. Subcycle is 0 for a periodic inventory. Subcycle 99 may be used for plots that are not included in the estimation process."),
  tree_bored_code_pacific_northwest_research_station INT64 OPTIONS(description="Used in conjunction with tree age (BHAGE and TOTAGE). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  tree_bored_code_pacific_northwest_research_station_name STRING OPTIONS(description="Used in conjunction with tree age (BHAGE and TOTAGE). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_location_1_pacific_northwest_research_station INT64 OPTIONS(description="The location on the tree where Damage Agent 1 is found. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_location_1_pacific_northwest_research_station_name STRING OPTIONS(description="The location on the tree where Damage Agent 1 is found. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_location_2_pacific_northwest_research_station INT64 OPTIONS(description="The location on the tree where Damage Agent 1 is found. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_location_2_pacific_northwest_research_station_name STRING OPTIONS(description="The location on the tree where Damage Agent 1 is found. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  diameter_check_pacific_northwest_research_station INT64 OPTIONS(description="A separate estimate of the diameter without the obstruction if the diameter was estimated because of moss/vine/obstruction, etc. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  diameter_check_pacific_northwest_research_station_name STRING OPTIONS(description="A separate estimate of the diameter without the obstruction if the diameter was estimated because of moss/vine/obstruction, etc. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_agent_1_pacific_northwest_research_station INT64 OPTIONS(description="Primary damage agent code in PNW. Up to three damaging agents can be coded in PNW as Damage agent 1, Pacific Northwest Research Station, Damage agent 2, Pacific Northwest Research Station, and Damage agent 3, Pacific Northwest Research Station. A 2-digit code (with values from 01 to 99) indicating the tree damaging agent that is considered to be of greatest importance to predict tree growth, survival, and forest composition and structure. Additionally, there are two classes of damaging agents. Class I damage agents are considered more important than class II agents and are thus coded as a primary agent before the class II agents. For more information, see appendix K. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_agent_2_pacific_northwest_research_station INT64 OPTIONS(description="Primary damage agent code in PNW. Up to three damaging agents can be coded in PNW as Damage agent 1, Pacific Northwest Research Station, Damage agent 2, Pacific Northwest Research Station, and Damage agent 3, Pacific Northwest Research Station. A 2-digit code (with values from 01 to 99) indicating the tree damaging agent that is considered to be of greatest importance to predict tree growth, survival, and forest composition and structure. Additionally, there are two classes of damaging agents. Class I damage agents are considered more important than class II agents and are thus coded as a primary agent before the class II agents. For more information, see appendix K. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_agent_3_pacific_northwest_research_station INT64 OPTIONS(description="Primary damage agent code in PNW. Up to three damaging agents can be coded in PNW as Damage agent 1, Pacific Northwest Research Station, Damage agent 2, Pacific Northwest Research Station, and Damage agent 3, Pacific Northwest Research Station. A 2-digit code (with values from 01 to 99) indicating the tree damaging agent that is considered to be of greatest importance to predict tree growth, survival, and forest composition and structure. Additionally, there are two classes of damaging agents. Class I damage agents are considered more important than class II agents and are thus coded as a primary agent before the class II agents. For more information, see appendix K. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  leafy_mistletoe_class_code_pacific_northwest_research_station INT64 OPTIONS(description="All juniper species, incense cedars, white fir (CA only) and oak trees are rated for leafy mistletoe infection. This item is used to describe the extent and severity of leafy mistletoe infection (see MIST_CL_CD for dwarf mistletoe information). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  leafy_mistletoe_class_code_pacific_northwest_research_station_name STRING OPTIONS(description="All juniper species, incense cedars, white fir (CA only) and oak trees are rated for leafy mistletoe infection. This item is used to describe the extent and severity of leafy mistletoe infection (see MIST_CL_CD for dwarf mistletoe information). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_1_pacific_northwest_research_station_years_2001_2004 INT64 OPTIONS(description="Damage severity depends on the damage agent coded (see appendix K for codes). This is a 2-digit code that indicates either percent of location damaged (01-99), or the appropriate class of damage (values vary from 0-9 depending on the specific Damage Agent). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_1_a_pacific_northwest_research_station INT64 OPTIONS(description="Damage severity depends on the damage agent coded (see appendix K for codes). This is a 2-digit code indicating either percent of location damaged (01-99), or the appropriate class of damage (values vary from 0-4 depending on the specific Damage Agent). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_1_b_pacific_northwest_research_station INT64 OPTIONS(description="Damage severity B is only coded when the Damage Agent is white pine blister rust (36). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_1_b_pacific_northwest_research_station_name STRING OPTIONS(description="Damage severity B is only coded when the Damage Agent is white pine blister rust (36). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_2_pacific_northwest_research_station_years_2001_2004 INT64 OPTIONS(description="Damage severity depends on the damage agent coded (see appendix K for codes). This is a 2-digit code indicating either percent of location damaged (01-99), or the appropriate class of damage (values vary from 0-9 depending on the specific Damage Agent). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_2_a_pacific_northwest_research_station_starting_2005 INT64 OPTIONS(description="Damage severity depends on the damage agent coded (see appendix K for codes). This is a 2-digit code indicating either percent of location damaged (01-99), or the appropriate class of damage (values vary from 0-4 depending on the specific Damage Agent). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_2_b_pacific_northwest_research_station_starting_2005 STRING OPTIONS(description="Damage severity B is only coded when the Damage Agent is white pine blister rust (36). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  damage_severity_3_pacific_northwest_research_station_years_2001_2004 INT64 OPTIONS(description="Damage severity depends on the damage agent coded (see appendix K for codes). This is a 2-digit code indicating either percent of location damaged (01-99), or the appropriate class of damage (values vary from 0-9 depending on the specific Damage Agent). Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  unknown_damage_type_1_pacific_northwest_research_station INT64 OPTIONS(description="A code indicating the sign or symptom recorded when UNKNOWN damage code 90 is used. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  unknown_damage_type_1_pacific_northwest_research_station_name STRING OPTIONS(description="A code indicating the sign or symptom recorded when UNKNOWN damage code 90 is used. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  unknown_damage_type_2_pacific_northwest_research_station INT64 OPTIONS(description="A code indicating the sign or symptom recorded when UNKNOWN damage code 90 is used. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  unknown_damage_type_2_pacific_northwest_research_station_name STRING OPTIONS(description="A code indicating the sign or symptom recorded when UNKNOWN damage code 90 is used. Only collected by certain FIA work units (SURVEY.RSCD = 26)."),
  previous_periodic_prism_point_tree_number_southern_research_station INT64 OPTIONS(description="In some older Southeast Experiment Station states, the prism point, tree number (PNTN) of the current cycle did not match the previous cycle's prism point, tree number. Previous periodic prism point tree number southern research station is used to join the current and the previous prism plot trees."),
  disease_southern_research_station INT64 OPTIONS(description="A code indicating the incidence of fusiform, commandra rust or dieback. Dieback is only recorded for live hardwood trees where DIA 5.0 inches with at least 10 percent dieback. Fusiform and comandra rust are only recorded for live pine trees 5.0 inches with the following species codes: 110, 111, 121, 126, 128, or 131. Populated for all forested plots using the National Field Guide protocols (MANUAL 1.6 - 5.1). Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  disease_southern_research_station_name STRING OPTIONS(description="A code indicating the incidence of fusiform, commandra rust or dieback. Dieback is only recorded for live hardwood trees where DIA 5.0 inches with at least 10 percent dieback. Fusiform and comandra rust are only recorded for live pine trees 5.0 inches with the following species codes: 110, 111, 121, 126, 128, or 131. Populated for all forested plots using the National Field Guide protocols (MANUAL 1.6 - 5.1). Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  dieback_severity_southern_research_station INT64 OPTIONS(description="A code indicating the severity of hardwood crown dieback. Populated when Disease southern research station = 2. Populated for all forested plots using the National Field Guide protocols (MANUAL 1.6 - 5.1). Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  dieback_severity_southern_research_station_name STRING OPTIONS(description="A code indicating the severity of hardwood crown dieback. Populated when Disease southern research station = 2. Populated for all forested plots using the National Field Guide protocols (MANUAL 1.6 - 5.1). Only collected by certain FIA work units (SURVEY.RSCD = 33)."),
  damage_agent_code_1 INT64 OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_1_name STRING OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_2 STRING OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_2_name STRING OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_3 INT64 OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_3_name STRING OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  centroid_diameter FLOAT64 OPTIONS(description="The outside bark diameter (in inches) measured at CENTROID_DIA_HT_ACTUAL. For tree ferns, diameter is measured where the fronds emerge from the trunk. Only collected by certain FIA work units (SURVEY.RSCD = 26) for the Pacific Islands. This diameter is part of a new upper stem diameter protocol that began with remeasurement, except for Hawaii where the protocol was implemented in the first measurement."),
  calculated_centroid_diameter_height FLOAT64 OPTIONS(description="The height (in feet) to stem centroid. The stem centroid is located at 30 percent of the TOTAL LENGTH of the stem. Only collected by certain FIA work units (SURVEY.RSCD = 26) for the Pacific Islands. This height is part of a new upper stem diameter protocol that began with the first remeasurement, except for Hawaii where the protocol was implemented in the first measurement."),
  actual_centroid_diameter_height FLOAT64 OPTIONS(description="The height (in feet) to where stem centroid diameter was actually measured. It may differ from CENTROID_DIA_HT if abnormalities in the stem prevented a normal diameter measurement. Only collected by certain FIA work units (SURVEY.RSCD = 26) for the Pacific Islands. This height is part of a new upper stem diameter protocol that began with the first remeasurement, except for Hawaii where the protocol was implemented in the first measurement."),
  upper_stem_diameter INT64 OPTIONS(description="The outside bark upper stem diameter (in inches), measured at least 3 feet above the point where the DIA was taken. For larger trees, UPPER_DIA was recorded at the point where the main stem was at least 4.0 inches in diameter. This diameter is used in the calculation of stem taper, needed to improve the estimation of stem volume. Only collected by certain FIA work units (SURVEY.RSCD = 26) for the Pacific Islands. This is the legacy upper stem diameter protocol and will not be collected after the first remeasurement."),
  upper_stem_diameter_height INT64 OPTIONS(description="The height (in feet) to where upper stem diameter (UPPER_DIA) was measured. Only collected by certain FIA work units (SURVEY.RSCD = 26) for the Pacific Islands. This is the legacy upper stem diameter protocol and will not be collected after the first remeasurement."),
  sound_cubicfoot_volume_sawlog_portion FLOAT64 OPTIONS(description="The sound volume of wood in the central stem of a timber species tree of sawtimber size (9.0 inches DIA minimum for softwoods, 11.0 inches minimum DIA for hardwoods), from a 1-foot stump to a minimum top diameter (7.0 inches for softwoods, 9.0 inches for hardwoods) or to where the central stem breaks into limbs, all of which are less than the minimum top diameter. This is a per tree value and must be multiplied by trees per acre unadjusted to obtain per acre information. This attribute is blank (null) for softwood trees with DIA <9.0 inches (11.0 inches for hardwoods). All larger trees have entries in this field if they are growing-stock trees (tree class code = 2 and tree status code = 1). All rough and rotten trees (tree class code = 3 or 4) and dead and cut trees (tree status code = 2 or 3) are blank (null) in this field. Does not include rotten and missing cull (volume loss due to rotten and missing cull defect has been deducted)."),
  dry_biomass_sawlog_portion_sawtimber_tree FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) in the sawlog portion of timber species trees of sawtimber size (9.0 inches DIA minimum for softwoods, 11.0 inches minimum DIA for hardwoods), from a 1-foot stump to a minimum top diameter (7.0 inches for softwoods, 9.0 inches for hardwoods) or to where the central stem breaks into limbs, all of which are less than the minimum top diameter. This is a per tree value and must be multiplied by trees per acre unadjusted to obtain per acre information. This attribute is blank (null) for softwood trees with DIA <9.0 inches (11.0 inches for hardwoods). For dead or cut timber trees, this number represents the biomass at the time of death or last measurement. Dry biomass sawlog portion sawtimber tree is based on sound cubicfoot volume sawlog portion and specific gravity information derived by the Forest Products Lab and others (values stored in the Reference Species table)."),
  damage_agent_code_1_southern_research_station INT64 OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_2_southern_research_station INT64 OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  damage_agent_code_3_southern_research_station STRING OPTIONS(description="A code indicating the first damage agent observed when inspecting the tree from bottom to top (roots, bole, branches, foliage). If more than one agent is observed, the most threatening one is listed first where agents threatening survival are listed first and agents threatening wood quality second. Up to three damage agents can be recorded, from most important to least important (Damage agent code 1, Damage agent code 2 and Damage agent code 3). The codes used for damage agents come from the January 2012 Pest Trend Impact Plot System (PTIPS) list from the Forest Health Technology Enterprise Team (FHTET) that has been modified to meet FIA's needs. The list is modified by each region to meet the specific needs of that region. The general agent codes are listed here. See appendix J for the complete list of codes."),
  aboveground_dry_biomass FLOAT64 OPTIONS(description="The oven-dry biomass (pounds) in the aboveground portion, excluding foliage, of live trees with a diameter 1 inch, and dead trees with a diameter 5 inches. Calculated for both timber and woodland species. This is a per tree value and must be multiplied by TPA_UNADJ to obtain per acre information. Appendix M contains equations used to estimate biomass components in the FIADB. DRYBIO_AG = (DRYBIO_BOLE + DRYBIO_STUMP + DRYBIO_TOP + DRYBIO_SAPLING + DRYBIO_WDLD_SPP)"),
  unique_tree STRING OPTIONS(description="It is a unique identifier with the combination of plot sequence number, subplot number & tree record number."),
  actualht_calc STRING OPTIONS(description=""),
  actualht_calc_code STRING OPTIONS(description=""),
  cull_bf_rotten STRING OPTIONS(description=""),
  cull_bf_rotten_code STRING OPTIONS(description=""),
  cull_bf_rough STRING OPTIONS(description=""),
  cull_bf_rough_code STRING OPTIONS(description=""),
  prevdia_fld STRING OPTIONS(description=""),
  treecl_code_31_ncrs STRING OPTIONS(description=""),
  tree_grade_ncrs STRING OPTIONS(description=""),
  boughs_available_ncrs STRING OPTIONS(description=""),
  boughs_hrvst_ncrs STRING OPTIONS(description=""),
  treecl_code_31_ners STRING OPTIONS(description=""),
  agent_code_ners STRING OPTIONS(description=""),
  bfsnd_code_ners STRING OPTIONS(description=""),
  agechk_code_rmrs STRING OPTIONS(description=""),
  dia_1yrago_rmrs STRING OPTIONS(description=""),
  growbfscr_rmrs STRING OPTIONS(description=""),
  growcfsawlog_rmrs STRING OPTIONS(description=""),
  ht_1yrago_rmrs STRING OPTIONS(description=""),
  prev_actualht_rmrs STRING OPTIONS(description=""),
  prev_agechk_code_rmrs STRING OPTIONS(description=""),
  prev_bhage_rmrs STRING OPTIONS(description=""),
  prev_ht_rmrs STRING OPTIONS(description=""),
  prev_totage_rmrs STRING OPTIONS(description=""),
  prev_treecl_code_rmrs STRING OPTIONS(description=""),
  radage_code_rmrs STRING OPTIONS(description=""),
  radgrw_rmrs STRING OPTIONS(description=""),
  volbfscrgrs_rmrs STRING OPTIONS(description=""),
  volbfscrnet_rmrs STRING OPTIONS(description=""),
  volcfdeadgrs_rmrs STRING OPTIONS(description=""),
  volcfsawgrs_rmrs STRING OPTIONS(description=""),
  volcfsawnet_rmrs STRING OPTIONS(description=""),
  volcftotnet_rmrs STRING OPTIONS(description=""),
  volcfuppgrs_rmrs STRING OPTIONS(description=""),
  volcfuppnet_rmrs STRING OPTIONS(description=""),
  sapling_fusiform_srs STRING OPTIONS(description=""),
  epiphyte_pnwrs STRING OPTIONS(description=""),
  root_ht_pnwrs STRING OPTIONS(description=""),
  cavity_use_pnwrs STRING OPTIONS(description=""),
  core_length_pnwrs STRING OPTIONS(description=""),
  culturally_killed_pnwrs STRING OPTIONS(description=""),
  dia_est_pnwrs STRING OPTIONS(description=""),
  gst_pnwrs STRING OPTIONS(description=""),
  inc10yr_pnwrs STRING OPTIONS(description=""),
  inc5yrht_pnwrs STRING OPTIONS(description=""),
  inc5yr_pnwrs STRING OPTIONS(description=""),
  ring_count_inner_2inches_pnwrs STRING OPTIONS(description=""),
  ring_count_pnwrs STRING OPTIONS(description=""),
  snag_dis_code_pnwrs STRING OPTIONS(description="")
)
OPTIONS(
  description="Trees measured on the plots. \t\n\nPages in FIA Documentation: 3-3"
);

INSERT INTO `bigquery-public-data.usfs_fia.tree` (tree_sequence_number, plot_sequence_number, previous_tree_sequence_number, tree_inventory_year, tree_state_code, tree_survey_unit_code, tree_county_code, tree_phase_2_plot_number, subplot_number, tree_record_number, condition_class_number, azimuth, horizontal_distance, previous_condition_number, tree_status_code, tree_status_code_name, species_code, species_common_name, species_scientific_name, species_group_code, species_group_code_name, current_diameter, diameter_height_code, diameter_height_code_name, total_height, height_method_code, height_method_code_name, actual_height, tree_class_code, tree_class_code_name, compacted_crown_ratio, crown_class_code, crown_class_code_name, tree_grade_code, cause_death_agent_code, cause_death_agent_code_name, rotten_and_missing_cull, damage_location_1, damage_location_1_name, damage_type_1, damage_type_1_name, damage_severity_1, damage_severity_1_name, damage_location_2, damage_location_2_name, damage_type_2, damage_type_2_name, damage_severity_2, damage_severity_2_name, decay_class_code, decay_class_code_name, tree_stocking, woodland_tree_species_stem_count, net_cubicfoot_volume, gross_cubicfoot_volume, net_cubicfoot_volume_sawlog_portion_sawtimber_tree, gross_cubicfoot_volume_sawlog_portion_sawtimber_tree, net_boardfoot_volume_sawlog_portion_sawtimber_tree, gross_boardfoot_volume_sawlog_portion_sawtimber_tree, sound_cubicfoot_volume, net_annual_merchantable_cubicfoot_growth_growingstock_tree_timberland, net_annual_merchantable_boardfoot_growth_sawtimber_tree_timberland, net_annual_sound_cubicfoot_growth_live_tree_timberland, merchantable_cubicfoot_volume_growingstock_tree_timberland_mortality_purposes, merchantable_boardfoot_volume_sawtimber_tree_timberland_mortality_purposes, sound_cubicfoot_volume_tree_timberland_mortality_purposes, merchantable_cubicfoot_volume_growingstock_tree_timberland_removal_purposes, merchantable_boardfoot_volume_sawtimber_tree_timberland_removal_purposes, sound_cubicfoot_volume_live_tree_timberland_removal_purposes, diameter_check_code, diameter_check_code_name, mortality_year, salvable_dead_code, salvable_dead_code_name, uncompacted_live_crown_ratio, crown_position_code, crown_position_code_name, crown_light_exposure_code, crown_light_exposure_code_name, crown_vigor_code_sapling, crown_vigor_code_sapling_name, crown_density_code, crown_density_code_name, crown_dieback_code, crown_dieback_code_name, foliage_transparency_code, foliage_transparency_code_name, tree_history_code, current_diameter_calculated, breast_height_age, total_age, dead_cull, form_cull, missing_top_cull_field_recorded, boardfoot_cull, cubicfoot_cull, boardfootcull_soundness, cubicfootcull_soundness, sawlog_height, bole_height, form_class, form_class_name, current_height_calculated, hardwood_clump_code, calculated_site_index, tree_created_by, tree_created_date, tree_created_in_instance, tree_modified_by, tree_modified_date, tree_modified_in_instance, mortality_code, mortality_code_name, height_to_diameter_measurement_point, rough_cull, mistletoe_class_code, mistletoe_class_code_name, rotten_missing_cull_field_recorded, reconcile_code, reconcile_code_name, previous_diameter, net_annual_merchantable_cubicfoot_growth_growingstock_tree_forest_land, net_annual_merchantable_boardfoot_growth_sawtimber_tree_forest_land, net_annual_sound_cubicfoot_growth_live_tree_forest_land, merchantable_cubicfoot_volume_growingstock_tree_forest_land_mortality_purposes, merchantable_boardfoot_volume_sawtimber_tree_forest_land_mortality_purposes, sound_cubicfoot_volume_tree_forest_land_mortality_purposes, merchantable_cubicfoot_volume_growingstock_tree_forest_land_removal_purposes, merchantable_boardfoot_volume_sawtimber_tree_forest_land_removal_purposes, sound_cubicfoot_volume_live_tree_forest_land_removal_purposes, periodic_annual_growth_removal_mortality_flag, tree_class_code_northeastern_research_station, tree_class_code_northeastern_research_station_name, tree_class_code_southern_research_station, tree_class_code_southern_research_station_name, tree_class_code_north_central_research_station, tree_class_code_north_central_research_station_name, tree_class_code_rocky_mountain_research_station, tree_class_code_rocky_mountain_research_station_name, standing_dead_code, standing_dead_code_name, previous_tree_status_code, previous_tree_status_code_name, previous_woodland_stem_count, trees_per_acre_unadjusted, mortality_trees_per_acre_per_year_unadjusted, removal_trees_per_acre_per_year_unadjusted, growth_trees_per_acre_unadjusted, dry_biomass_in_the_merchantable_bole, dry_biomass_top_limbs_tree, dry_biomass_tree_stump_at_t_1, aboveground_dry_biomass_saplings, aboveground_dry_biomass_woodland_tree_species, belowground_dry_biomass, aboveground_carbon, belowground_carbon, tree_inventory_cycle_number, tree_inventory_subcycle_number, tree_bored_code_pacific_northwest_research_station, tree_bored_code_pacific_northwest_research_station_name, damage_location_1_pacific_northwest_research_station, damage_location_1_pacific_northwest_research_station_name, damage_location_2_pacific_northwest_research_station, damage_location_2_pacific_northwest_research_station_name, diameter_check_pacific_northwest_research_station, diameter_check_pacific_northwest_research_station_name, damage_agent_1_pacific_northwest_research_station, damage_agent_2_pacific_northwest_research_station, damage_agent_3_pacific_northwest_research_station, leafy_mistletoe_class_code_pacific_northwest_research_station, leafy_mistletoe_class_code_pacific_northwest_research_station_name, damage_severity_1_pacific_northwest_research_station_years_2001_2004, damage_severity_1_a_pacific_northwest_research_station, damage_severity_1_b_pacific_northwest_research_station, damage_severity_1_b_pacific_northwest_research_station_name, damage_severity_2_pacific_northwest_research_station_years_2001_2004, damage_severity_2_a_pacific_northwest_research_station_starting_2005, damage_severity_2_b_pacific_northwest_research_station_starting_2005, damage_severity_3_pacific_northwest_research_station_years_2001_2004, unknown_damage_type_1_pacific_northwest_research_station, unknown_damage_type_1_pacific_northwest_research_station_name, unknown_damage_type_2_pacific_northwest_research_station, unknown_damage_type_2_pacific_northwest_research_station_name, previous_periodic_prism_point_tree_number_southern_research_station, disease_southern_research_station, disease_southern_research_station_name, dieback_severity_southern_research_station, dieback_severity_southern_research_station_name, damage_agent_code_1, damage_agent_code_1_name, damage_agent_code_2, damage_agent_code_2_name, damage_agent_code_3, damage_agent_code_3_name, centroid_diameter, calculated_centroid_diameter_height, actual_centroid_diameter_height, upper_stem_diameter, upper_stem_diameter_height, sound_cubicfoot_volume_sawlog_portion, dry_biomass_sawlog_portion_sawtimber_tree, damage_agent_code_1_southern_research_station, damage_agent_code_2_southern_research_station, damage_agent_code_3_southern_research_station, aboveground_dry_biomass, unique_tree, actualht_calc, actualht_calc_code, cull_bf_rotten, cull_bf_rotten_code, cull_bf_rough, cull_bf_rough_code, prevdia_fld, treecl_code_31_ncrs, tree_grade_ncrs, boughs_available_ncrs, boughs_hrvst_ncrs, treecl_code_31_ners, agent_code_ners, bfsnd_code_ners, agechk_code_rmrs, dia_1yrago_rmrs, growbfscr_rmrs, growcfsawlog_rmrs, ht_1yrago_rmrs, prev_actualht_rmrs, prev_agechk_code_rmrs, prev_bhage_rmrs, prev_ht_rmrs, prev_totage_rmrs, prev_treecl_code_rmrs, radage_code_rmrs, radgrw_rmrs, volbfscrgrs_rmrs, volbfscrnet_rmrs, volcfdeadgrs_rmrs, volcfsawgrs_rmrs, volcfsawnet_rmrs, volcftotnet_rmrs, volcfuppgrs_rmrs, volcfuppnet_rmrs, sapling_fusiform_srs, epiphyte_pnwrs, root_ht_pnwrs, cavity_use_pnwrs, core_length_pnwrs, culturally_killed_pnwrs, dia_est_pnwrs, gst_pnwrs, inc10yr_pnwrs, inc5yrht_pnwrs, inc5yr_pnwrs, ring_count_inner_2inches_pnwrs, ring_count_pnwrs, snag_dis_code_pnwrs) VALUES (3123494010661, 3123466010661, NULL, 1985, 17, 2, 51, 33, 109, 4, 1, NULL, nan, 1, 3, 'Removed - Cut and removed by direct human activity related to harvesting, silviculture or land clearing. This tree is assumed to be utilized.', 541, 'white ash', 'Fraxinus americana', 36, 'Ash', 12.199999809265137, 1, 'Breast height (DBH)', NULL, NULL, '', NULL, 0, '', NULL, NULL, '', NULL, 0, 'No agent recorded (only allowed on live trees in data prior to 1999).', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, NULL, 16.4237003326416, nan, nan, nan, nan, nan, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, NULL, '', 1985, NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, nan, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, '2003-09-19', 10661, NULL, '2011-08-30', 20004, NULL, '', nan, NULL, NULL, '', NULL, NULL, '', nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, 'N', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, 5.03000020980835, 0.0, 1.6766999959945679, 5.03000020980835, nan, nan, nan, nan, nan, nan, 0.0, 0.0, 3, 0, NULL, '', NULL, '', NULL, '', NULL, '', NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, NULL, '', NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, nan, nan, NULL, NULL, nan, nan, NULL, NULL, NULL, nan, '31234660106611094', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), (3539488010661, 3539475010661, NULL, 1981, 20, 2, 125, 35, 108, 2, 1, NULL, nan, 1, 3, 'Removed - Cut and removed by direct human activity related to harvesting, silviculture or land clearing. This tree is assumed to be utilized.', 602, 'black walnut', 'Juglans nigra', 40, 'Black walnut', 12.699999809265137, 1, 'Breast height (DBH)', NULL, NULL, '', NULL, 0, '', NULL, NULL, '', NULL, 0, 'No agent recorded (only allowed on live trees in data prior to 1999).', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, NULL, 12.357500076293945, nan, nan, nan, nan, nan, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, NULL, '', 1973, NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, nan, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, '2003-09-19', 10661, NULL, '2011-08-30', 20004, NULL, '', nan, NULL, NULL, '', NULL, NULL, '', nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, 'N', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, 4.260000228881836, 0.0, 0.0, 4.260000228881836, nan, nan, nan, nan, nan, nan, 0.0, 0.0, 3, 0, NULL, '', NULL, '', NULL, '', NULL, '', NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, NULL, '', NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, nan, nan, NULL, NULL, nan, nan, NULL, NULL, NULL, nan, '35394750106611082', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), (3513114010661, 3513102010661, NULL, 1981, 20, 1, 43, 41, 104, 4, 1, NULL, nan, 1, 3, 'Removed - Cut and removed by direct human activity related to harvesting, silviculture or land clearing. This tree is assumed to be utilized.', 972, 'American elm', 'Ulmus americana', 41, 'Other eastern soft hardwoods', 11.699999809265137, 1, 'Breast height (DBH)', NULL, NULL, '', NULL, 0, '', NULL, NULL, '', NULL, 70, 'Unknown/not sure/other - includes death FROM human activity not related to silvicultural or landclearing activity (accidental, random, etc.).', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, NULL, 12.111200332641602, nan, nan, nan, nan, nan, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, NULL, '', 1973, NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, nan, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, '2003-09-19', 10661, NULL, '2011-08-30', 20004, NULL, '', nan, NULL, NULL, '', NULL, NULL, '', nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, 'N', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, 5.019999980926514, 0.0, 0.0, 5.019999980926514, nan, nan, nan, nan, nan, nan, 0.0, 0.0, 3, 0, NULL, '', NULL, '', NULL, '', NULL, '', NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, NULL, '', NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, nan, nan, NULL, NULL, nan, nan, NULL, NULL, NULL, nan, '35131020106611044', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), (3135628010661, 3135613010661, NULL, 1985, 17, 1, 87, 45, 105, 1, 1, NULL, nan, 1, 3, 'Removed - Cut and removed by direct human activity related to harvesting, silviculture or land clearing. This tree is assumed to be utilized.', 802, 'white oak', 'Quercus alba', 25, 'Select white oaks', 20.0, 1, 'Breast height (DBH)', NULL, NULL, '', NULL, 0, '', NULL, NULL, '', NULL, 0, 'No agent recorded (only allowed on live trees in data prior to 1999).', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, NULL, 55.5635986328125, nan, nan, nan, nan, nan, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, NULL, '', 1984, NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, nan, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, '2003-09-19', 10661, NULL, '2011-08-30', 20004, NULL, '', nan, NULL, NULL, '', NULL, NULL, '', nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, 'N', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, 5.03000020980835, 0.0, 1.6766999959945679, 5.03000020980835, nan, nan, nan, nan, nan, nan, 0.0, 0.0, 3, 0, NULL, '', NULL, '', NULL, '', NULL, '', NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, NULL, '', NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, nan, nan, NULL, NULL, nan, nan, NULL, NULL, NULL, nan, '31356130106611051', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL), (3544586010661, 3544576010661, NULL, 1981, 20, 1, 139, 151, 105, 3, 1, NULL, nan, 1, 3, 'Removed - Cut and removed by direct human activity related to harvesting, silviculture or land clearing. This tree is assumed to be utilized.', 602, 'black walnut', 'Juglans nigra', 40, 'Black walnut', 24.200000762939453, 1, 'Breast height (DBH)', NULL, NULL, '', NULL, 0, '', NULL, NULL, '', NULL, 0, 'No agent recorded (only allowed on live trees in data prior to 1999).', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, NULL, 96.0426025390625, nan, nan, nan, nan, nan, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, 0.0, 0.0, nan, NULL, '', 1973, NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, nan, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, '2003-09-19', 10661, NULL, '2011-08-30', 20004, NULL, '', nan, NULL, NULL, '', NULL, NULL, '', nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, 'N', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', NULL, 1.1699999570846558, 0.0, 0.0, 1.1699999570846558, nan, nan, nan, nan, nan, nan, 0.0, 0.0, 3, 0, NULL, '', NULL, '', NULL, '', NULL, '', NULL, NULL, NULL, NULL, '', NULL, NULL, NULL, '', NULL, NULL, NULL, NULL, NULL, '', NULL, '', NULL, NULL, '', NULL, '', NULL, '', NULL, '', NULL, '', nan, nan, nan, NULL, NULL, nan, nan, NULL, NULL, NULL, nan, '35445760106611053', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);