Improvements to the Douglas-fir Growth Model and Calculator

In:

DS Technical Notes

Report No:

DSTN-021

Report Date:

September 1, 2010

Author(s):

M Kimberley, M van der Colff

This report describes Version 4.0 of the Douglas-fir Calculator. This new version of the Calculator contains a number of changes including various improvements to the productivity index calibration algorithm, a batch-run facility allowing productivity indices to be obtained, and removal of a bias in the growth model which caused under-prediction following thinning. Further validation of the growth model indicates that it generally performs well and is unbiased overall. However, several mostly minor shortcomings in model performance have been identified that will be corrected in future releases of the model. This updated version of the Douglas-fir Calculator is available to FFR members.

Document:

DSTN-021 (743.26 Kb)