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Selection Thinning Increases Slash Pine Size and Quality

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A single selection thinning of slash pine (Pinus elliottii Engelm. var. elliottii) from 117 to 75 ft.²/A of basal area at age 12 increased mean d. b. h. one inch and sawtimber and pole volume 21 percent over the unthinned check at age 27. Total merchantable cubic-foot volume was not significantly affected by thinning over a wide range of treatments; however, repeated cutting to 50 ft²/A of basal area appeared to reduce merchantable volume. Volume advantage of the unthinned plots disappeared, due to high mortality (1,058 ft³/A) between age 17 and 27. Thinning to a stocking of 50 ft²/A reduced mortality to 22 percent of the check.
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Document Type: Journal Article

Affiliations: Project Leader, Cultural Treatments Research, International paper Company, Southlands Experiment Forest, Bainbridge, Georgia

Publication date: 01 November 1979

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