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A Regional Study on the Influence of Woody and Herbaceous Competition on Early Loblolly Pine Growth

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Abstract:

A common study design has been installed at 14 locations Southwide to track the growth of loblolly pine established with four different competition control treatments: (a) no control, (b) woody control, (c) herbaceous control, and (d) total control after site preparation. This regionwide investigation is the Competition Omission Monitoring Project (COMP). During the first 5 years, the general pine response by treatment has been greater growth in height, diameter, and volume index as follows: total control > herbaceous control > woody control > no control. Generally, diameter growth was more responsive than height to vegetation control treatments. On 13 plantation study sites, pine volume after 5 years with total control averaged about fourfold more than with no control. Volume was increased by an average of 67% with woody control, while herbaceous control increased volume by 171%, showing the greater average influence of herbaceous competition during the initial 5 years. The magnitude of growth reductions by competitors varied by site and intensity. South. J. Appl. For. 15(4):169-179.

Document Type: Journal Article

Affiliations: School of Forestry, Louisiana Tech University, Ruston, LA 71272

Publication date: 1991-11-01

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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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