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Paperback. Etat : New. Print on Demand. This book provides site index equations and mean annual increment equations used by the Forest Inventory and Analysis Program at the Portland Forestry Sciences Laboratory, Pacific Northwest Research Station, Forest Service, US. Department of Agriculture. The equations are for 24 tree species in California, Oregon, and Washington. For each species, the book describes the methods used to construct the equations and presents a summary of the modeling approach and number of trees sampled in most of these cited sources. A good site tree is a tree that was classified as a dominant within the stand (unless King's method was used, which took the five with largest diameter), had never been suppressed, and had a normally formed top. The species should represent the forest within the sampled condition, with the preferred site species in western Oregon, western Washington, and northwestern California being Douglas-fir. These equations have been used since the 1980s inventories, and the equations used before then are no longer used. Specifically, this set was used for periodic inventories in Oregon (1985, 1995, and Washington (1988, 1990, 1992, 1994). The book documents the past and present inventories, making this a valuable resource for foresters, land managers, and researchers interested in the growth and yield of Pacific Northwest forests. Forgotten Books publishes hundreds of thousands of rare and classic books. This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. The digital edition of all books may be viewed on our website before purchase. print-on-demand item.