Notes: Merchantable Height in Lieu of Total Height in Stem Profile Equations

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Abstract:

A procedure that uses merchantable height in lieu of total height in an existing stem profile equation was devised and tested using data from natural hardwood stands in Tennessee. Diameter at merchantable height was subtracted from each measured stem diameter. Consequently the transformed diameter at merchantable height becomes zero and provides compatibility with existing stem profile equations while maintaining tree stem profile. A stem profile model was fitted to the transformed data and evaluated for its ability to predict upper stem diameters. Standard errors of the estimate and biases indicate a good fit based on comparison with published results using total height. Equations to predict height at a specific diameter and volume between two heights derived from the stem profile equation modified for merchantable height are presented in an appendix. For. Sci. 34(2):505-511.

Keywords: Hardwoods; height equations; volume equations

Document Type: Miscellaneous

Affiliations: Associate Professor, Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN 37901-1071

Publication date: June 1, 1988

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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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