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    Description

    The mean crown diameters of stand-grown trees 5.0-in. dbh and larger were modeled as a function of stem diameter, live-crown ratio, stand-level basal area, latitude, longitude, elevation, and Hopkins bioclimatic index for 53 tree species in the western United States. Stem diameter was statistically significant in all models, and a quadratic term for stem diameter was requiredfor some species. Crown ratio and/or Hopkins index also improved the models for most species. A term,for stand-level basal area was not generally needed but did yield some minor improvement for a few species. Coefficients of variation from the regression solutions ranged from 17 to 33%, and model R2 ranged from 0.15 to 0.85. Simpler models, based solely on stem diameter, are also presented.

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    Citation

    Bechtold, William A. 2004. Largest-Crown- Width Prediction Models for 53 Species in the Western United States. West. J. Appl. For. 19(4):245-251.

    Keywords

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

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https://www.fs.usda.gov/treesearch/pubs/7732