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Title: Cottonwood Plantation Growth Through 20 Years
Author(s): Krinard, Roger M.; Johnson, Robert L.
Date: 1984
Source: Res. Pap. SO-212. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 11 p.
Station ID: RP-SO-212
Description: At age 20 survival of unthinned cottonwood (Populusdeltoides Bartr. ex Marsh.) planted on medium-textured soil at spacings of 4 by 9, 8 by 9, 12 by 12, and 16 by 18 feet was 10, 17, 30, and 62 percent, and average diameters were 10.6, 11.8, 12.6, and 13.7 inches, respectively. Depending on spacing and diameter threshold, -cubic volume mean annual increment peaked at ages 7 to 13. Thinning compared to no thinning reduced cubic volume production. Thinned or unthinned plots of 16- by l&foot spacing and heaviest thinning at 12 by 12 spacing produced from 340 to 400 board feet per acre per year (Doyle) during the 20 years in trees 2 12.0 inches to a lo-inch top. Other spacing-treatment combinations provided from 110 to 230 board feet per acre per year.
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