Rocky Mountain Research Station

Title: Profile models for estimating log end diameters in the Rocky Mountain Region

Author: Czaplewski, Raymond L.; Brown, Amy S.; Walker, Raymond C.

Date: 1989

Source: Res. Pap. RM-RP-284. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 7 p.

Station ID: RP-RM-284

Description: The segmented polynomial stem profile model of Max and Burkhart was applied to seven tree species in the Rocky Mountain Region of the Forest Service. Errors were reduced over the entire data set by use of second-stage models that adjust for transformation bias and explained weak patterns in the residual diameter predictions.

Keywords: Taper equations, merchantable volume estimates, bias correction, Abies concolor, Abies lasiocarpa, Picea engelmannii, Pinus con- torta, Pinus ponderosa, Pseudotsuga menziesii, Populus tremuloides

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Citation

Czaplewski, Raymond L.; Brown, Amy S.; Walker, Raymond C.  1989.  Profile models for estimating log end diameters in the Rocky Mountain Region.   Res. Pap. RM-RP-284. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 7 p..