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
    Author(s): Dale S. Solomon; Lianjun Zhang
    Date: 2002
    Source: Forest and Ecology Management 155:163-170
    Publication Series: Scientific Journal (JRNL)
    Station: Northeastern Research Station
    PDF: Download Publication  (395.46 KB)


    The maximum size-density relationships or self-thinning lines were developed for three mix .ed-softwood climax forest habitats (hemlock-red spruce, spruce-fir, and cedar-black spruce) in the northeastern USA. The plot data were collected from an extensive data base used in growth studies from 1950 to 1970, and represented a wide range of species compositions, sites, management options, and densities. Plots having late successional species compositions with relative density index higher than 0.7 were selected as the most fully-stocked plots for model development. Reduced major axis regression was used to fit the self-thinning lines to the data. The differences between the three forest habitats were tested using the 95% confidence intervals of the coefficients of the self-thinning lines. The results indicated that there were no differences between the hemlock-red spruce and spruce-fir habitats for both relationships of the mean tree volume versus number of trees, and the quadratic mean I tree diameter versus number of trees. Thus, these two habitats were combined to develop a single self-thinning line. However, the cedar-black spruce forest habitat required a separate self-thinning line. These maximum size-density relationships can be readily used to construct stand density management diagrams.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, if you notice any errors which make this publication unusable.
    • 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.


    Solomon, Dale S.; Zhang, Lianjun. 2002. Maximum size-density relationships for mixed softwoods in the northeastern USA. Forest and Ecology Management 155:163-170


    Self-thinning, Stand density, Stocking, Mixed-softwood forest, Northeast

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page