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Slash Pine Site Index From a Polymorphic Model by Joining (Splining) Nonpolynomial Segments With an Algebraic Difference Method

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Abstract:

Site index curves for slash pine plantations were improved by splining segments of two published height-age models in the form of algebraic differences thus avoiding the numerical approximation of derivatives. The splined site curves fit better than any single model across the entire range of data and have the desirable properties: (1) height is zero when age is zero, (2) height at base age equals site index, (3) each curve has a separate upper asymptote, and (4) the curves are invariant with respect to choice of base age. Forest Sci. 30:411--423.

Keywords: Pinus elliottii; height age curves; spline

Document Type: Journal Article

Affiliations: Mensurationist, USFS Southeastern Forest Experiment Station, Athens, Georgia

Publication date: 1984-06-01

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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