Authors: |
Paul A. Murphy, Michael G. Shelton |
Year: |
1994 |
Type: |
Scientific Journal |
Station: |
Southern Research Station |
Source: |
South. J. Appl. For. 18(3):128-132 |
Abstract
The effects of three levels of residual basal area (40, 60, and 80 ft2/ac), maximum dbh (12, 16, 20 in.) and site index (<81ft., 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 in the south Arkansas and north Louisiana. Designated levels of basal area and maximum dbh were achieved by harvesting; a q factor of 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, Doyle rule) and annual per acre survivor growth, ingrowth, and mortality components of basal area growth. Growth for all volume measures increased with an increase in basal area. Site index did not significantly affect merchantable cubic-foot growth but has a positive effect on sawtimber growth in both cubic feet and board feet, Doyle. Increases in maximum dbh decreased merchantable and sawtimber cubic-foot growth but increased growth for board-foot volume, Doyle.
Citation
Murphy, Paul A.; Shelton, Michael G. 1994. Growth of loblolly pine stands after the first five years of uneven-aged silviculture using single-tree selection. South. J. Appl. For. 18(3):128-132