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Modeling Response to Thinning in Loblolly Pine Plantations

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Data from a thinning study established in loblolly pine (Pinus taeda L.) plantations at different locations in the southeastern United States were used to develop response models for basal area and survival following thinning. The nonlinear regression models predict total cumulative response as a function of stand and site conditions at time of thinning, thinning intensity, and elapsed time since thinning. Variables expressing thinning intensity that were significant predictors of response included before and after thinning basal areas and number of trees. The models suggest that initially after thinning, volume response declines briefly then gradually increases toward the unthinned control. Managers can use the equations presented here to evaluate the effect of alternative thinning regimes on stand development. The response equations can also be combined with baseline models for unthinned stands to predict basal area and number of trees following thinning. South. J. Appl. For. 24(1):17-22.
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Document Type: Journal Article

Affiliations: Department of Forestry, Virginia Tech, Blacksburg, Virginia 24061, (540) 231-7263;, Fax: (540) 231-3698

Publication date: 2000-02-01

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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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