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Yield Prediction for Unthinned Natural Slash Pine Stands

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Equations are presented for predicting number of trees, mean height, and total volume outside bark by diameter class when stand age (A), site index (SI), and current number of trees per hectare (N) are known in unthinned natural stands of slash pine. The Weibull distribution was fitted to diameter frequency data, then suitable height-diameter and volume-D²H models were developed to calculate the Weibull parameters for the distributions of height and volume. Parameters for diameter and height distributions can be predicted from A, SI, and N and these equations are incorporated with the volume-D²H model in a computer program that generates a diameter frequency distribution, mean height, and total volume per acre or hectare by diameter class. Forest Sci. 25:25-30.

Keywords: Weibull distribution; diameter distribution; functional models; height distribution; volume distribution

Document Type: Journal Article

Affiliations: Retired Supervisory Research Forester, Lake City, Florida

Publication date: 1979-03-01

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.

    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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