Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (458 KB bytes)

Title: Effect of vegetative competition on the moisture and nutrient status of loblolly pine

Author: Carter, G.A.; Miller, J.H.; Davis, D.E.; Patterson, R.M.;

Date: 1984

Source: Canadian Journal of Forest Research. 14(1): 1-9.

Publication Series: Miscellaneous Publication

Description: A field study examined the effects of competing vegetation on the moisture and nutrient status of 5-year-old loblolly pines (Pinus taeda L.). Similar experiments were conducted on a Piedmont site and a Coastal Plain site using individual pines as experimental units. Predawn measurements of xylem pressure potential were made using detached needle fascicles.and nutrient concentrations in soil and foliage samples were determined monthly. This study was conducted during the 3rd year of a relatively dry 3-year period. On the Piedmont site, elimination of all competing vegetation within 1.5 m of the pines significantly lowered moisture stress when compared with the no-elimination treatment; on the Ccastal Plainee site, differences were significant on only half of the assay dates. Removing only arborescent vegetation on the Piedmont site reduced pine water stress one-half as much as removing all vegetation, but on the Coastal Plain site this reduction was about two-thirds of that found following removal of all vegetation. As drought length increased. stress increased, regardless of treatmemt. Higher levels of competing vegetation significantly reduced available potassium, calcium. magnesium. and manganese concentrations the loamy sand of the Coastal Plain site. but only potassium was reduced on the Piedmont. None of the treatments significantly affected foliar nutrients at either site.

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.
  • You may send email to to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)



Carter, G.A.; Miller, J.H.; Davis, D.E.; Patterson, R.M. 1984. Effect of vegetative competition on the moisture and nutrient status of loblolly pine. Canadian Journal of Forest Research. 14(1): 1-9.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.