Western larch (Larix occidentalis Nutt.) commonly grows in mixed stands, and is a relatively important tree species in the Nelson Forest Region. Researchers at the University of British Columbia undertook a larch productivity study, which included collecting data from 114 stem analysis plots. Of these, 99 plots were suitable for developing growth intercept models. The data were analyzed using a standard technique. The resulting set of 50 equations estimates site index for larch stands from breast height age 1 to 50. The models have accuracy comparable with those of interior spruce but are not as accurate as those for lodgepole pine.
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Updated April 19, 2007