Optimum Management Regimes for Uneven-Aged Loblolly-Shortleaf Pine Stands Managed Under the Selection System in the West Gulf Region
Authors: Hotvedt, James E.; Abernethy, Yvonne F.; Farrar, Robert M.
Source: Southern Journal of Applied Forestry, Volume 13, Number 3, 1 August 1989 , pp. 117-122(6)
Publisher: Society of American Foresters
Abstract:Residual basal area, the ratio of sawtimber to total merchantable basal area, and cutting cycle length were used as decision variables to develop and analyze alternative management regimes for uneven-aged loblolly-shortleaf pine stands managed under the selection system in southern Arkansas and northern Louisiana. Sawtimber and pulpwood yields associated with the regimes were calculated from models for all-aged loblolly-shortleaf pine stands with site indices of 85-95 ft (base age 50 yr) developed by Murphy and Farrar (1982, 1983). Optimum economic regimes based on present net value (PNV) had low sawtimber to merchantable basal area ratios (0.55) and short cutting cycles (4-5 yr) when compared to the ranges specified for these variables. Optimum sawtimber production regimes based on periodic annual increment (PAI) had high residual basal areas (60-65 ft²/ac), high sawtimber to merchantable basal area ratios (0.70-0.80), and short cutting cycles (4-6 yr). Using sawtimber production as the primary objective in choosing management regimes resulted in a large loss of PNV. The loss of annual sawtimber production was relatively low, however, when PNV was used as the objective. South. J. Appl. For. 13(3):117-122.
Document Type: Journal Article
Publication date: August 1, 1989
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