Reineke’s stand density index: a quantitative and non-unitless measure of stand density

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

  • Authors: VanderSchaaf, Curtis L.
  • Publication Year: 2013
  • Publication Series: Paper (invited, offered, keynote)
  • Source: In: Guldin, James M., ed. 2013. Proceedings of the 15th biennial southern silvicultural research conference. e-Gen. Tech. Rep. SRS-GTR-175. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 577-579.

Abstract

When used as a measure of relative density, Reineke’s stand density index (SDI) can be made unitless by relating the current SDI to a standard density but when used as a quantitative measure of stand density SDI is not unitless. Reineke’s SDI relates the current stand density to an equivalent number of trees per unit area in a stand with a quadratic mean diameter (Dq) of either 10 inches (English units) or 25.4 cm (metric units). Thus, when used as a quantitative measure, SDI is in fact unit dependent on two levels, one is whether English or metric units are used, and the second is whether the unit area is 1 acre (ha) or two, three, etc. Foresters should express SDI as either number of trees per acre or /ha to clearly indicate the unit. When viewing SDI as a quantitative measure, it is legitimate to use the slope of the linear portion of an individual stand’s size-density trajectory.

  • Citation: VanderSchaaf, Curtis L. 2013. Reineke’s stand density index: a quantitative and non-unitless measure of stand density. In: Guldin, James M., ed. 2013. Proceedings of the 15th biennial southern silvicultural research conference. e-Gen. Tech. Rep. SRS-GTR-175. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 577-579.
  • Posted Date: June 19, 2013
  • Modified Date: August 2, 2013
  • 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.