Method for Estimating Potential Tree-grade Distributions for Northeastern Forest Species
Auteur : Daniel A. Yaussy, Northeastern Forest Experiment Station (Radnor, Pa.)
Date de publication : 1993
Éditeur : U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station
Nombre de pages : 12
Résumé du livre
S2Generalized logistic regression was useld to distribute trees into four potential tree grades for 20 northeastern species groqps. Potential tree grade is defined as the tree grade based solely on the length and amount of clear cuttings and defects, disregarding minimum grading diameters. The algorithms described use site index and tree diameter as the predictive variables, allowing the equations to be incorporated into individual-tree growth and yield simulators such as NE-TWIGS. S3.