Stocking of Northern Hardwood Regeneration Based on Exponential Dropout Rate
Author(s) -
William B. Leak
Publication year - 1969
Publication title -
the forestry chronicle
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 49
eISSN - 1499-9315
pISSN - 0015-7546
DOI - 10.5558/tfc45344-5
Subject(s) - stocking , mathematics , hardwood , dropout (neural networks) , negative binomial distribution , binomial (polynomial) , exponential function , statistics , combinatorics , tree (set theory) , exponential distribution , forestry , ecology , biology , geography , computer science , mathematical analysis , machine learning , poisson distribution
Survival and mortality in even-aged seedling-sapling northern hardwoods are described as an exponential process, where the probability of a tree — alive at mean stand diameter [Formula: see text] and living to mean stand diameter [Formula: see text] or beyond — is:[Formula: see text][Formula: see text]Values of R were estimated from field data. The average number of trees at [Formula: see text] required to produce 1 tree at [Formula: see text] equals 1/P. By using the binomial distribution, the author determined the number of trees at [Formula: see text] required to produce with high probability 1 tree or more at [Formula: see text]. Regeneration stocking guides, based on this mathematical process, are presented.
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