Growth of 20-Year-Old Virginia Pine Planted at Three Spacings in Tennessee
Abstract:Average height of dominant and codominant Virginia pines (Pinus virginiana Mill). on a Mid-Cumberland Plateau site was 46 feet at plantation age 20, equivalent to a site index (base age 50) of 75. Trees planted at a spacing of 8 x 8 feet had a merchantable yield (outside bark to a 4.0 inch top for all trees with a dbh of 4.6 inches and larger) of 1,987 ft³ per acre with a basal area of 114 ftsup2; per acre. Comparative statistics on the other spacings tested were: 6 x 6 feet--2,067 ftsup3; and 123 ftsup2; and 4 x 4 feet--2,155 ftsup3; and 141 ftsup2;. Survival on the plots was: 4 x 4 feet--38%; 6 x 6 feet--58%; and 8 x 8 feet--75%. Height to base of live crown averaged 25 feet, and dead branches remained nearly to the ground on most trees at all spacings.
Document Type: Journal Article
Affiliations: Principal soil scientist, Silviculture Laboratory, maintained at Sewanee, Tennessee 37375 by the Southern Forest Experiment Station, USDA Forest Service, in cooperation with the University of the South
Publication date: February 1, 1985
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