| Abstrakt: |
Thinning, fertilizer, and prescribed burning treatments were applied to a pole‐size longleaf pine (Pinus palustrisMill.) plantation in the Upper Coastal Plain of South Carolina. Thinning levels were 11.5, 18.4, 25.3 m2/ha of residual basal area, plus an unthinned treatment. Fertilized plots received 90 kg/ha P plus 168 kg/ha N. Half of the plots were burned prior to thinning and fertilization. Heavier levels of thinning produced a larger diameter response than fertilization, while burning had no effect during the two years following treatment. Diameter response to thinning resulted from increased formation of latewood, while the response to fertilization resulted from increased formation of earlywood during the first growing season after treatment. Because of these differences in growth response, thinning tended to produce wood of higher specific gravity while fertilization produced wood of lower specific gravity. |
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