Mechanical and chemical release applied to a 16-year-old pine plantation / Gary O. Fiddler, Philip M. McDonald, and Sylvia R. Mori.

Format:

Book

Government document

Author/Creator:

Fiddler, Gary O.

Contributor:

McDonald, Philip M. (Research forester)

Mori, Sylvia R.

Pacific Southwest Research Station

Series:

Research note PSW ; 425.

Research note PSW ; 425

Language:

English

Subjects (All):

Jeffrey pine--United States.

Jeffrey pine.

Ponderosa pine--United States.

Ponderosa pine.

Competition (Biology)--United States.

Competition (Biology).

pinus ponderosa (species).

United States.

Physical Description:

1 online resource (11 pages) : illustrations.

Place of Publication:

Albany, Calif. : U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station, [2000]

Summary:

"To increase the growth of planted conifer saplings, the competing vegetation in a 16-year-old pine plantation on the Plumas National Forest in northern California was mechanically treated with the Tracmac mechanical cutter. The large size of this vegetation (chinkapin, greenleaf manzanita, whitethorn, huckleberry oak) eliminated other release methods as feasible alternatives. Additional treatments were a chemical treatment, in which 2,4-0 was applied to a portion of the study site that had been treated with the Tracmac 2 years previously, and untreated control. Eleven growing seasons after treatment, mechanical release alone did not significantly increase diameter, height, or crown cover of the pines compared to the control. In contrast, the Tracmac plus herbicide (chemical) treatment statistically increased conifer crown cover compared to the other two treatments. Pine diameter and height were also larger in the chemical treatment than in the other two treatments, but not significantly. Mean crown cover was 120 percent greater in the saplings in the chemical treatment than for pines in the control, height was 35 percent greater, and diameter was 50 percent greater. Relative costs were $218 per acre for the mechanical treatment and $267 per acre for the Tracmac plus herbicide (chemical). The most cost-effective treatment was Trac-mac plus herbicide."

Notes:

Title from PDF title screen (viewed Mar. 12, 2012).

"April 2000."

Includes bibliographical references (pages 10-11).

Other Format:

Print version: Fiddler, Gary. Mechanical and chemical release applied to a 16-year-old pine plantation

OCLC:

779978017