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SB Distribution-Based Models for Individual Tree Merchantable Volume-Total Volume Ratios

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Individual tree volume distribution, the proportion of total tree volume from the stump to any top diameter limit, was modeled with Johnson's SB distribution. Parameter prediction and percentile prediction approaches were evaluated. The SB; models provided reasonable alternatives to regression models and performed particularly well from about 40 percent of breast height to the bottom of the tree. Several problems which are commonly encountered with volume ratio data when using a regression approach can be overcome by the proposed distribution-based approaches. Forest Sci. 31:389-398.

Keywords: Pinus taeda; merchantable volume estimation; percentiles

Document Type: Journal Article

Affiliations: Assistant Professor, Department of Forest Resources, 110 Green Hall, University of Minnesota, St. Paul, MN 55108

Publication date: June 1, 1985

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