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Title: Comparison of methods to determine disk and heartwood areas
Author: Wiemann, Michael C.; Brown, John P.; Bennett, Neal D.;
Source: Research Papers, Rep. NE-720. Newtown Square, PA: U. S. Department of Agriculture, Forest Service, Northeastern Research Station. 15 p.
Publication Series: Research Paper (RP)
Description: The feasibility of using radius measurements on disks to determine cross-sectional areas of tree stems and the heartwood they contain was examined in sugar maple and red oak butt logs. Areas calculated from quadratic means of four stem radii and four heartwood radii were compared with areas measured with a planimeter. The lineal measurement method was less precise for disks taken from stumps than it was for disks taken from the tops of butt logs, probably because of bole irregularities. The radii measurements were more variable for heartwood than for complete disks in sugar maple but not in red oak. Areas computed from radii were the same as areas measured with a planimeter for only maple stump disks and red oak stump disks and heartwood.
Keywords: planimeter, red oak, sugar maple
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Wiemann, Michael C.; Brown, John P.; Bennett, Neal D. 2002. Comparison of methods to determine disk and heartwood areas. Research Papers, Rep. NE-720. Newtown Square, PA: U. S. Department of Agriculture, Forest Service, Northeastern Research Station. 15 p.
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