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A Basal Area Ratio Predictor of Loblolly Pine Plantation Mortality

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A predictor of the probability of plantation-grown loblolly pine (Pinus taeda L.) periodic mortality is presented. The dependent mortality variable, Proportional Stem Mortality (PSM), is the proportion of trees in a level of the predictor variable, Basal Area Index (BAI), which died over a specified period of time. Basal Area Index is the ratio of the basal area of an individual tree on a sample plot to the basal area of the tree of mean dbh on the sample plot. Data for the predictor is obtainable from any sampling scheme which results in a list of diameters for each sample plot or point. The predictor was developed and evaluated using data from a nitrogen fertilization study where mortality over a 3-year period had been observed. Weibull functions were fitted to the PSM-BAI data using an iterative hill-climbing technique called pattern search. Forest Sci. 25:275-282.

Keywords: Pinus taeda; Weibull distribution; competition index

Document Type: Journal Article

Affiliations: Professor, Department of Industrial Engineering, Auburn University, Auburn, Alabama 36830

Publication date: June 1, 1979

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

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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