Diameter Distribution Yield Systems for Unthinned Cutover Site-Prepared Slash Pine Plantations in Southern Mississippi
Equations and procedures for estimating size class distributions of unthinned young slash pine (Pinus elliottii Englem.) plantations on cutover site-prepared land in south Mississippi are described. Diameter distributions are approximated by determining the parameters of a three-parameter Weibull probability density function with expected arithmetic mean, quadratic mean, and minimum diameters equal to predicted. Stock tables are prepared from stand tables using compatible tree volume ratio/profile equations prepared from 150 stem analysis trees. The estimates of survival and yield in this study are based on typical stand conditions and are lower than those given by Dell et al. (1979) for ideal stand conditions. When the same survival functions are used in both models, however, both models predict yields that are nearly equal for most practical purposes. A FORTRAN computer program is available from the authors for obtaining stand and stock tables from stand age, site index, and numbers of tree per acre. South. J. Appl. For. 11(1):32-36.
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Document Type: Journal Article
Affiliations: Department of Forestry, Mississippi Agricultural and Forestry Experiment Station, Mississippi State University, Mississippi State, MS 39762
Publication date: 1987-02-01
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