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A Comparison of Methods for Determining Volume of Increment Cores

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Because specific gravity is directly correlated with many characteristics of wood, it frequently is used to predict differences in physical and mechanical properties. The weight and volume of a wood sample are needed for calculating specific gravity, unless the value is determined by displacement of a liquid of known specific gravity. Weight may be determined by comparing a specimen's mass to that of a standard certified by the U. S. Bureau of Standards. No similar standard is available for making volume estimates. In order to select the "best" method, variation among ten methods of measuring volume was studied. Thirty, one-inch lengths of 4 mm increment cores were used as test specimens. Mean dimensions, weights, and volumes, and the standard error for each volume value were calculated. An analysis of variance for volume data and an equation for correlating two methods of measuring volume (length and average midpoint diameter and length and bore diameter of the increment borer) are presented. Although the investigation failed to reveal which method was most accurate (due to lack of a standard of comparison), the "best" method was believed to be a calculation based on measured length and average midpoint diameter of the green core. Midpoint diameter was based on two measurements, one made at right angles to the other.
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Document Type: Journal Article

Affiliations: 1963 Forestry Graduate of the University, is now a member of the U. S. Army

Publication date: 1964-03-01

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  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

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