Predicting the cover-up of dead branches using a simple single regressor equation

This article is part of a larger document. View the larger document here.

Download
(PDF; 614 KB)
Cite
Feedback
  • Authors: Oswalt, Christopher M.; Clatterbuck, Wayne K.; Burkhardt, E.C.
  • Publication Year: 2007
  • Publication Series: General Technical Report (GTR)
  • Source: e-Gen. Tech. Rep. SRS–101. U.S. Department of Agriculture, Forest Service, Southern Research Station: 77-85 [CD-ROM].

Abstract

Information on the effects of branch diameter on branch occlusion is necessary for building models capable of forecasting the effect of management decisions on tree or log grade. We investigated the relationship between branch size and subsequent branch occlusion through diameter growth with special attention toward the development of a simple single regressor equation for use in future hardwood stem quality models. Data were obtained from 21 boards representing 3 logs of the first 21 feet of one cherrybark oak originating from a planted stand north of Vicksburg, MS. Double cross-validation methods were used to evaluate fitted models. A non-linear model form (Y = a*BKmax b, where Y = overwood, BKmax = maximum branch-knot diameter and a and b are parameters) provided the best fit. The model explained approximately 50 percent of the variation in overwood.

  • Citation: Oswalt, Christopher M.; Clatterbuck, Wayne K.; Burkhardt, E.C. 2007. Predicting the cover-up of dead branches using a simple single regressor equation. e-Gen. Tech. Rep. SRS–101. U.S. Department of Agriculture, Forest Service, Southern Research Station: 77-85 [CD-ROM].
  • Posted Date: July 19, 2007
  • Modified Date: January 8, 2008

    • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.