Angle-gauge Sampling A Small Hardwood Tract
Abstract:Techniques of estimating basal area per acre by line-sampling and point-sampling with three angle-gauges on a map of a 4.84-acre upland hardwood tract were evaluated. An analysis of unadjusted edge effect bias indicated an expected error in underestimating basal area per acre of about 5 percent for point-sampling and about 3 percent for line-sampling. Coefficients of variation in estimating basal area per acre were about equal for point-sampling and line-sampling. As expected the coefficients of variation depended on the angle-gauge used with a range from about 40 percent with a critical angle 104.18 minutes to about 60 percent with 180.46 minutes.
Document Type: Journal Article
Affiliations: Research Forester, New Hampshire Division of Resources Development, Fox Forest, Hillsboro
Publication date: 1966-03-01
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- Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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