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Variation in the Specific Gravity of the Springwood and Summerwood of Four Species of Southern Pines

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Active interest in timber growing in the South as a result of the expansion of pulp and paper manufacture has emphasized the need for greater technical knowledge of the characteristics of the southern pines. Studies at the Forest Products Laboratory show that the weight or density of any of the four most important species of southern pine--slash, longleaf, loblolly, and shortleaf pine--may vary over an exceedingly wide range. Sometimes certain pieces of wood have double the density of other pieces of the same species. Such variations in density have a direct bearing upon the strength, workability, shrinkage, ability to hold paint, and other properties as well as upon the quality and yield of pulp from these species.
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Document Type: Journal Article

Affiliations: U. S. Forest Service at Madison. Wis. in cooperation with the University of Wisconsin, Forest Products Laboratory

Publication date: 1939-06-01

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    The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

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