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    Author(s): John E. Baumgras; Paul E. Sendak; David L. Sonderman; David L. Sonderman
    Date: 2000
    Source: In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: symposium on sustainable management of hemlock ecosystems in eastern North America; 1999 June 22-24; Durham, NH. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station: 156-160.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (17.57 KB)

    Description

    Ring shake is a barrier to improved utilization of eastern hemlock, an important component of the total softwood timber resource in the Eastern United States and Canada. Ring shake is the lengthwise separation of wood that occurs between and parallel to growth rings, diminishing lumber yields and values. Evaluating the potential for ring shake is essential to improving estimates of tree and stand volume and value, and identifying forest management practices that could minimize the occurrence of ring shake. To assess the incidence and extent of ring shake in eastern hemlock, we sampled 377 trees containing 1,247 sawlogs from sites in Maine, New York, Pennsylvania, North Carolina, Tennessee, and Georgia. Results include relative frequencies of trees and logs with ring shake detected in dry and green lumber. Relationships between tree attributes and the occurrence of ring shake in dry and green lumber also are presented.

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    Citation

    Baumgras, John E.; Sendak, Paul E.; Sonderman, David L. 2000. Ring Shake in Eastern Hemlock: Frequency and Relationship to Tree Attributes. In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: symposium on sustainable management of hemlock ecosystems in eastern North America; 1999 June 22-24; Durham, NH. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station: 156-160.

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