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Development of Planting Density‐Specific Density Management Diagrams for Loblolly Pine

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For density management diagrams (DMDs), it is usually assumed the relative value between Reineke's stand density index (SDI) where self-thinning is expected to begin and a maximum size-density relationship species boundary line is constant regardless of planting density. Using estimated size-density trajectories of loblolly pine plantations in the southeastern United States, the quadratic mean diameter at which the onset of self-thinning occurs was determined. An equation was then fitted to estimate the quadratic mean diameter at which self-thinning is expected to begin relative to planting density. DMDs that accounted for planting density showed that self-thinning began at 40‐72% of the species maximum SDI for planting densities ranging from 605 to 2,722 seedlings per acre.

Keywords: Pinus taeda; self-thinning; stand density index; zone of imminent competition mortality

Document Type: Research Article


Publication date: 2012-08-01

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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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