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Effects of Ripping and Herbicide Site Preparation Treatments on Loblolly Pine Seedling Growth and Survival

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Herbicide (1 lb ai/acre hexazinone as VelparĀ® L) and mechanical (ripping) site preparation treatments increased height and diameter of loblolly pine (Pinus taeda L.) seedlings planted on a Ouachita Mountain site in southeastern Oklahoma. Total height after two growing seasons was increased approximately 10% by ripping, 23% by the herbicide treatment, and 49% by the combined herbicide and ripping treatment, as compared with the check treatment. Ground-line diameter was increased 20%, 55%, and 83% respectively by these treatments. Reduction of competing vegetation and increased soil moisture were related to site preparation treatments. The combined ripping and herbicide treatment was the most effective treatment in conserving soil water and in reduction of competing biomass. Competing vegetation biomass was reduced 75% in the first year by the combined ripping-herbicide treatment, and a substantial reduction in competing biomass was still evident at the end of the second growing season. South. J. Appl. For. 10:253-257, Nov. 1986.
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Document Type: Journal Article

Affiliations: Former Graduate Research Assistant, Oklahoma State University

Publication date: 1986-11-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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