Comparison of the Centroid Method and Taper Systems for Estimating Tree Volumes
There is a need to be able to accurately determine the volumes of trees. Current methods include the use of volume tables or taper systems which should be tested for applicability before use in a given stand. This can be costly and time consuming. The objective of this study was to compare the estimates made using accepted taper systems and the more "generic" centroid method and determine which gives the best results. Twenty trees each of northern red oak and red pine and 19 yellow-poplar trees were harvested. Diameter measurements were taken every 4 in. with calipers for the first 40 ft of each stem. These measurements were used to calculate the "true" or control volumes. The appropriate taper system for each species and the centroid method were used to estimate the tree volumes, and these estimates were compared with the control volumes. The centroid method was less biased than taper systems for all three species. Precision was better for the centroid method than taper systems for yellow-poplar and red pine, but not for northern red oak. North. J. Appl. For. 10(1): 8-9.
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Document Type: Journal Article
Affiliations: Department of Forestry, The Australian National University, GPO Box 4, Canberra, ACT 2601, Australia
Publication date: 1993-03-01
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