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Projecting Crown Measures for Loblolly Pine Trees Using a Generalized Thinning Response Function

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Crown size is an important measure of tree vigor. Measures of crown have been used to predict response to silvicultural practices such as thinning and fertilization. This study was aimed toward examining the projection of crown measures and developing a new measure of thinning effect on crown development. Results showed that using a crown height increment model that projects crown size directly or an allometric model, which derives crown ratio from tree diameter and height information, can be an effective means of modeling crown size for individual trees. By incorporating a new thinning response function into the equations, crown dimensions can be projected for thinned and unthinned stand conditions. This new thinning response function is based on biological considerations and is sensitive to thinning intensity, age of thinning, and elapsed time since thinning. For Sci. 41(1):43-53.
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Keywords: Pinus taeda; allometric model; growth; incremental model; yield

Document Type: Journal Article

Affiliations: Senior Research Associate, Department of Forestry, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0324

Publication date: 1995-02-01

More about this publication?
  • 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.

    2016 Impact Factor: 1.782 (Rank 17/64 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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