Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub

    Description

    Equations to predict foliage weight and surface area, and their vertical and horizontal distributions, within the crowns of unthinned loblolly pine (Pinus tueduL.) trees are presented. A right-truncated Weibull function was used for describing vertical foliage distributions. This function ensures that all of the foliage located between the tree tip and the foliage base is included. Foliage distribution prediction is based on actual two-dimensional foliage location. It is shown that the average time of full foliage, and hence average foliage weight or surface area prediction, is highly variable for loblolly pine and subject to considerable error. To help account for the old and new foliage differences during the approximate time of "full leaf," the prediction equations for new and old foliage weight and surface area include a day-of-year term. New equations to predict branch weight, surface area, and the vertical distributions of branch biomass and surface area were also developed. The vertical distributions of branch biomass and surface area are described with logarithmic equations constrained to equal zero when relative crown depth is equal to zero, and to equal one when relative crown depth is one.

    Publication Notes

    • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Baldwin, V. Clark, Jr.; Peterson, Kelly D.; Burkhatt, Harold E.; Amateis, Ralph L.; Dougherty, Phillip M. 1996. Equations for estimating loblolly pine branch and foliage weight and surface area distributions. Can. J. For. Res. 27: 918-927 (1997)

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/557