Crown release increases growth of crop trees
1990
Lamson, Neil I. | Smith, H. Clay | Perkey, Arlyn W. | Brock, Samuel M.
"Two Appalachian hardwood stands in north-central West Virginia were thinned. The primary species were red oak, yellow-poplar and chestnut oak. For both stands, the site index for northern red oak averaged 75 feet. An area wide thinning using "basal-area control" was applied to a 54-year-old stand, while specific crop trees were selected and released in a 12-year-old stand. Individual-tree 5-year growth of codominant trees was related to the number of sides of the crown that was free-to-grow. Codominant trees and crop trees grew about 25 percent faster in d.b.h. than similar trees released on one or two sides of the crown. For best diameter-growth response, a tree should be released on at least three and preferably four sides of the crown.S3.
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