Crown-Diameter Prediction Models for 87 Species of Stand-Grown Trees in the Eastern United States

William Bechtold

Treesearch

Crown-Diameter Prediction Models for 87 Species of Stand-Grown Trees in the Eastern United States

Informally Refereed

Authors:

William Bechtold

Year:

2003

Type:

Scientific Journal

Station:

Southern Research Station

Source:

South. J. Appl. For. 27(4):269-278.

Download (PDF 213 KB)

Download (PDF 213 KB): https://research.fs.usda.gov/download/treesearch/6206.pdf

Abstract

The mean crown diameters of stand-grown trees were modeled as a function of stem diameter, live-crown ratio, stand basal area, latitude, longitude, elevation, and Hopkins bioclimatic index for 87 tree species in the eastern United States. Stem diameter was statistically significant in all models, and a quadratic term for stem diameter was required for some species. Crown ratio and/or Hopkins index also improved the models for many species. Coefficients of variation from the regression solutions ranged from 18 to 35%, and model r-square values rangedfrom 0.15 to 0.88. Simpler models, based only on stem diameter and crown ratio, are also presented.

Keywords

Largest crown width, crown width, crown diameter, tree crown modeling

Citation

Bechtold, William A. 2003. Crown-Diameter Prediction Models for 87 Species of Stand-Grown Trees in the Eastern United States. South. J. Appl. For. 27(4):269-278.