This research develops a growth intercept model for coastal Douglas-fir. Forty-eight stem analysis plots were located in the Coastal Western Hemlock and Coastal Douglas-Fir biogeoclimatic zones of British Columbia. Three Douglas-fir trees in each plot were selected for intensive sampling. These trees were cut down and the height at the end of each growing season was identified from the annual branch whorls. The top height growth of the plots was reconstructed and the site index and growth intercept for breast height ages one to 50 were calculated from the height-breast height age data. A model was then fitted to the site index and growth intercept data, resulting in a growth intercept model which consisted of 50 functions. Four refinements to the growth intercept modelling technique are introduced in this report. These eliminate deficiencies noted in other growth intercept modelling endeavours.
Nigh, G.D.. 1997. A growth intercept model for coastal douglas-fir. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Research Report (FLNRORD). RR10
Topic: FLNRORD Research Program
Keywords: Growth, Yield
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