WestProPlus
Subtitle: a stochastic spreadsheet program for the management of all-aged Douglas-fir-- hemlock forests in the Pacific Northwest
By: Jingjing Liang, Joseph Buongiorno, and Robert A. Monserud.
Contributors: Buongiorno, Joseph.; Monserud, Robert A.; Pacific Northwest Research Station (Portland, Or.)
Series: General technical report PNW -- GTR-674.; General technical report PNW -- 674.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
Published: 2006
Place of publication: Portland, OR
Language: eng
Number of pages: 42
Subjects: Douglas fir -- Oregon -- Growth -- Computer simulation.; Douglas fir -- Washington (State) -- Growth -- Computer simulation.; Western hemlock -- Oregon -- Growth -- Computer simulation.; Western hemlock -- Washington (State) -- Growth -- Computer simulation.
Description: WestProPlus is an add-in program developed to work with Microsoft Excel to simulate the growth and management of all-aged Douglas-fir/western hemlock stands in Oregon and Washington. Its built-in growth model was calibrated from 2,706 permanent plots in the Douglas-fir/western hemlock forest type in Oregon and Washington. Stands are described by the number of trees per acre in each of 19 2-inch diameter classes in four species groups: Douglas fir, other shade-intolerant species, western hemlock, and other shade-tolerant species.  WestProPlus allows managers to predict stand development by year and for many decades from a specific initial state. The simulations are stochastic, based on bootstrapping of the disturbances observed on the permanent plots between inventories. Users can choose cutting regimes by specifying the interval between harvests (cutting cycle) and a target distribution of trees remaining after harvest. A target distribution can be a reverse-J-shaped distribution or any other desired distribution. Diameter-limit cuts can also be simulated. Tabulated and graphic results show diameter distributions, basal area, volumes by log grade, income, net present value, and indices of stand diversity by species and size.  This manual documents the program installation and activation, provides suggestions for working with Excel, and gives background information on WestProPlus's models. It offers a comprehensive tutorial in the form of two practical examples that explain how to start the program, enter simulation data, execute a simulation, compare simulations, and plot summary statistics.
Notes: Cover title.

"June 2006."

Includes bibliographical references (p. 25-27).

Also available on the Internet.