Estimating Dominant Height and Site Index of Even-Aged Interior Douglas-Fir in British Columbia
Authors: Thrower, James S.; Goudie, James W.
Source: Western Journal of Applied Forestry, Volume 7, Number 1, 1 January 1992 , pp. 20-25(6)
Publisher: Society of American Foresters
Abstract:Height-age and site-index curves were developed from stem analysis of 262 Douglas-fir trees (Pseudotsuga menziesii var. glauca) from 68 plots in the Interior Douglas-fir, Interior Cedar-Hemlock, and Sub-boreal Spruce Biogeoclimatic zones in the interior of British Columbia. Plots ranged in site index from about 8 to 30 m and in age from about 60 to 350 years; however, the analyses were limited to data up to 100 years of age. A conditioned logistic function was selected for predicting height, and a linear model was selected for predicting site index. The curves are similar to those developed in comparable studies in the Inland Empire, but differ substantially from curves developed in British Columbia from temporary sample plots. This study supports previous observations that the pattern of height growth for a given site index varies among ecologically different areas. West. J. Appl. For. 7(1):20-25.
Document Type: Journal Article
Affiliations: Ministry of Forests, Forest Science Research Branch, 31 Bastion Square, Victoria B.C. Canada V8W 3E7
Publication date: 1992-01-01
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