Bowling, Ernest H.2021-07-222021-07-221985http://hdl.handle.net/10919/104295A stand-level growth and yield model was developed to predict future diameter distributions of thinned stands of mixed Appalachian hardwoods. The model allows prediction by species groups and diameter classes. Stand attributes ( basal area per acre, trees per acre, minimum stand diameter, and arithmetic mean dbh) were projected through time for the whole stand and for individual species groups. Future diameter distributions were obtained using the three-parameter Weibull probability density function and parameter recovery method. The recovery method used employed the first two non-central moments of dbh (arithmetic mean dbh and quadratic mean dbh squared) to generate Weibull parameters. Future diameter distributions were generated for the whole stand and every species group but one; the diameter distribution of the remaining species group was obtained by subtraction from whole stand values. A system of tree volume equations which allow the user t o obtain total tree volume or merchantable volume to any top height or diameter completes the model. Volumes can be calculated by species group and summed to get whole stand volume.vii, 93 leavesapplication/pdfenIn CopyrightLD5655.V855 1985.B684Forests and forestry -- ForecastingForests and forestry -- MeasurementForests and forestry -- Statistical methodsForests and forestry -- Appalachian RegionHardwoods -- Appalachian RegionTrees -- Growth -- Mathematical modelsThesis