A Lognormal Approach to Diameter Distributions in Even-Aged Stands
Abstract:Diameter distributions of Douglas-fir can be described by the empirical three-parameter lognormal curve, in which the variate is y = log(y' + yo'). Following a description of both a graphic and a numerical solution for the origin or third parameter yo', the logarithm of the origin is shown to be a linear function of the logarithm of the initial mean dbh (y') in a series of 16 distributions. Given the predicted origins Yo', the means and standard deviations of y = log(y' + Yo') are simple functions of log y'. Agreement between the observed and the expected frequencies is tested by x2.
Document Type: Journal Article
Affiliations: Student in Yale College
Publication date: 1964-09-01
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
Average time from submission to first decision: 62.5 days*
June 1, 2016 to Feb. 28, 2017
Also published by SAF:
Journal of Forestry
Other SAF Publications
- Submit a Paper
- Membership Information
- Author Guidelines
- Ingenta Connect is not responsible for the content or availability of external websites