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Notes: Critical Height Sampling and Volumes by Cylindrical Shells

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The approach to unbiasedness used by McTague and Bailey (1985) is extended to prove that the critical height sampling stand volume estimator is unbiased for any tree taper. This is done by using the method of cylindrical shells to calculate individual tree volumes as solids of rotation. The bias that occurs when attempting to estimate total stand volume by sighting sample trees at dbh rather than stump diameter is discussed. Adjustments for bias are proposed when taper functions other than those used by McTague and Bailey (1985) are applicable, though the bias would be negligible in most practical applications. Forest Sci. 32:829-834.

Keywords: Point sampling; tree form; tree taper

Document Type: Miscellaneous

Affiliations: Assistant Professor, Department of Forestry, Oklahoma State University, Stillwater, OK 74078

Publication date: 1986-09-01

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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.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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