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Volume or Weight Estimates Below a Merchantability Limit

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Two methods are presented and evaluated for estimating volume or weight of trees whose diameter at breast height (d.b.h.) is less than the minimum specified by inventory design. Both methods make use of censored data where trees below the minimum d.b.h. are only counted, not measured. Each method provides reasonable estimates of volume or weight for these trees, but each has certain advantages. The first method requires fitting of the censored data with the Weibull function, providing estimates of stem count and volume or weight by d.b.h. class below minimum d.b.h. A simpler second method requires an estimate of average tree d.b.h. below the minimum d.b.h. but provides only estimates of stem count and weight or volume for all trees below minimum d.b.h.
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Document Type: Journal Article

Affiliations: Associate Professor, Department of Forestry, VPI & State University, Blacksburg, Virginia 24061

Publication date: 1983-05-01

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    Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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