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    Author(s): K.W. Seidel
    Date: 1984
    Source: Res. Note PNW-RN-409. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p
    Publication Series: Resource Bulletin (RB)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (510 KB)

    Description

    The 10-year growth response from a spacing study in an even-aged stand of western larch (Larix occidentalis Nutt.) and Engelmann spruce (Picea engelmannii Parry ex Engelm.), thinned at age 10 to 9- and 15-foot spacings, was measured in eastern Oregon. Both basal area and total cubic volume increment per acre increased at the narrower spacing while diameter growth per tree was less than at the wider spacing. Height growth was not affected by spacings. Larch grew about twice as fast as spruce in height and diameter resulting in the development of a stratified two-storied stand.

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    Citation

    Seidel, K.W. 1984. A western larch-engelmann spruce spacing study in eastern Oregon: results after 10 years. Res. Note PNW-RN-409. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 5 p

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    Keywords

    growth response, thinnings (-stand volume), spacing thinnings, thinning effects, western larch, Larix occidentalis, Engelmann spruce, Picea engelmannii, eastern Oregon

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