Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

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

Publication Information

View PDF (126 KB bytes)

Title: Impact of vegetation control and annual fertilization on properties of loblolly pine wood at age 12

Author: Clark, Alexander III; Borders, Bruce E.; Daniels, Richard F.;

Date: 2004

Source: Forest Products Journal Vol. 54, No. 12, p. 90-96, December 2004

Publication Series: Miscellaneous Publication

Description: Loblolly pine (Pinus taeda L.) stands in the Coastal Plain and Piedmont of Georgia were subjected to four intensive silvicultural regimes to monitor and record relative tree growth. Treatments included: intensive mechanical site preparation, complete vegetation control with multiple applications of herbicides, annual high rates of nitrogen fertilization, and complete vegetation control plus annual high rates of nitrogen fertilization. In response to the intense cultural practices, growth increased 270 percent in the Coastal Plain and 158 percent in the Piedmont compared to the intensive mechanical site preparation treatment. Increment cores were collected from trees at age 12 to determine the effect of treatments on earlywood and latewood specific gravity (SG) and duration of juvenility. Trees were also felled to determine the impact of intensive cultural practices on wood stiffness, strength, and toughness. Annual vegetation control plus annual high rates of nitrogen fertilization increased the diameter of the juvenile wood core 62 percent and thus, the proportion of stem basal area in juvenile wood. Annual ring earlywood SG was not affected by treatments, but annual ring latewood SG was significantly reduced in fertilized and herbicide plus fertilized trees. Vegetation control did not significantly affect SG, strength, stiffness, or toughness but did significantly increase the juvenile core-wood diameter. Annual fertilization alone or in combination with vegetation control reduced weighted stem SG 6 to 10 percent compared to that of the trees receiving only the mechanical site preparation treatment. Annual heavy fertilization alone or in combination with vegetation control significantly reduced toughness, as well as strength and stiffness of juvenile wood. Thus, wood harvested from stands that since planting received annual vegetation control plus annual high rates of nitrogen fertilization would be less desirable for structural lumber production compared to wood from conventionally managed and planted loblolly pine stands.

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 pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Clark, Alexander, III; Borders, Bruce E.; Daniels, Richard F. 2004. Impact of vegetation control and annual fertilization on properties of loblolly pine wood at age 12. Forest Products Journal Vol. 54, No. 12, p. 90-96, December 2004

 


 [ 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.