Southern Research Station Headquarters - Asheville, NC
Main Logo of Southern Research Station, Stating: Southern Research Station - Asheville, NC, with a saying of 'Science you can use!'
[Images] Five photos of different landscape

Publication Information

Mail this page   Give us your feedback on this publication

Title: Use of a generalized sigmoid growth function to predict site index for unmanaged loblolly and slash pine plantations in East Texas
Author(s): Coble, Dean W.; Lee, Young-Jin
Date: 2006
Source: Gen. Tech. Rep. SRS-92. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 291-295
Description: A generalized sigmoid growth function was used in this study to model site index (SI) for unmanaged or lowintensity managed loblolly pine (Pinus taeda, L.) and slash pine (Pinus elliottii, Engelm.) plantations in east Texas. Schnute's growth function was fit to 11,367 and 5,040 height-age observations of loblolly and slash pine, respectively. These data were collected over a 20-year period from unmanaged pine plantations located across the east Texas region as a part of the East Texas Pine Plantation Research Project (ETPPRP). The fit model was used to derive SI equations (25-year index age). The SI equations apply to unmanaged or low-intensity managed loblolly and slash pine plantations in east Texas ranging in age from 5 to 40 years. They can also serve as a baseline for SI estimation of intensely managed pine plantations.
View and Print this Publication (240 KB)
Publication Notes:
  • 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.
  • Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS Webmaster, srswebmaster@fs.fed.us if you notice any errors which make this publication unuseable.
[ Get Acrobat ] Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility




Publication Links:

FIA Resource Bulletins

Publications Search


Search for on-line publications
containing the following:

 


(Uncheck this box to search all R&D Publications.)

Small logo of the USDASmall logo of the Forest Service