Growth of loblolly pine stands after the first years of uneven-aged silviculture using single-tree selection
1994
Murphy, P.A. | Shelton, M.G.
The effects of three levels of residual basal area (40.60, and 80 ft2/ac), (12,16, and 20 in.) and site index (<81 ft, 81 to 90 ft, and >90 ft) on the growth of loblolly pine (Pinus taeda L.) stands after 5 yr of uneven-aged silviculture were determined from plots located i south Arkansas and north Louisiana. Designated levels of basal area and maximum dbh were achieved by harvesting: a q factor 1.2 (using 1 in. dbh classes) was imposed on all plots as closely as possible. Stand-level models were developed for annual per acre net volume growth (merchantable cubic-feet, sawtimber cubic feet, and sawtimber board feet, and sawtimber board feet, Doyle rule) and annual per acre survivor growth, ingrowth, and mortality components of basal area growth. growth for all volume measure increased with an increase in basal area. Site index did not significantly affect merchantable cubic-foot growth but had a positive effect on sawtimber growth in both cubic feet and board feet, Doyle. Increases in maximun dbh decreased merchantable and sawtimber cubic-foot growth but increased growth for board-foot volume, Doyle.
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