Effect of Tree Spacing on Weight Yields for Red Pine and Jack Pine
Maximum weight yields were primarily a function of usable volume for 15-year-old stands of red pine (Pinus resinosa Ait.) and jack pine (Pinus banksiana Lamb.). Data were gathered on plantation spacings of 2 by 2, 4 by 4, 6 by 6, and 8 by 8 feet in Waushara County, Wis. Specific gravity showed no definite relationship to stand density for either species. In red pine the "optimum" yield and, consequently, the apparent best spacing for this site changed from 4 by 4 to 6 by 6 feet because of economic factors such as seedling, planting, and maintenance costs. The jack pine "optimum" for this site was also the 6- by 6-foot spacing.
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Document Type: Journal Article
Affiliations: Forest Product Technologist, Forest Products Laboratory, Forest Service U. S. Dept. of Agric., Madison, Wisc.
Publication date: 1967-09-01
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