A local basal area adjustment for crown width prediction

  • Authors: Bragg, Don C.
  • Publication Year: 2001
  • Publication Series: Miscellaneous Publication
  • Source: Northern Journal of Applied Forestry. 18(1): 22-28.


Nonlinear crown width regressive equations were developed for 24 species common to the upper Lake States of Michigan, Minnesota, and Wisconsin. Of the species surveyed, 15 produced statistically significant (P < 0.05) local basal area effect coefficients showing a reduction in crown width increasing stand density. No relation between shade tolerance and crown width was apparent, indicating the species-dependence of this parameter. Using adjusted R2 as a guide, nonlinear crown width models adapted for local basal area (NLCWadj) improved predictions for 20 of 24 species over a lacking this component (NLCW). The ecological significance of the improvement shown for some species may be minor, but for others the difference was substantial (often 8 percent).

  • Citation: Bragg, Don C. 2001. A local basal area adjustment for crown width prediction. Northern Journal of Applied Forestry. 18(1): 22-28.
  • Posted Date: April 1, 1980
  • Modified Date: August 22, 2006
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