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    • Journal of Range Management, Volume 42 (1989)
    • Journal of Range Management, Volume 42, Number 1 (January 1989)
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    Sheep grazing as a silvicultural tool to suppress brush

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    Author
    Sharrow, S. H.
    Leininger, W. C.
    Rhodes, B.
    Issue Date
    1989-01-01
    Keywords
    agroforestry
    woody weeds
    biological control
    brush control
    Pseudotsuga menziesii
    forest plantations
    Oregon
    sheep
    grazing
    
    Metadata
    Show full item record
    Citation
    Sharrow, S. H., Leininger, W. C., & Rhodes, B. (1989). Sheep grazing as a silvicultural tool to suppress brush. Journal of Range Management, 42(1), 2-4.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/645078
    DOI
    10.2307/3899647
    Additional Links
    https://rangelands.org/
    Abstract
    The possibility of using livestock as a biological agent to control unwanted ground vegetation in Pacific Northwest coniferous forests has been discussed for over 50 years. However, little quantitative information has yet been published documenting the efficacy of livestock in suppressing brush and other ground vegetation in commercial Douglas-fir (Pseudotsuga menziesii) plantations. Therefore, a study was conducted in 1981 and 1982 to evaluate the potential for using herded sheep to control competing vegetation in Douglas-fir plantations in Pacific Northwest coniferous forests. Three 4- to 6-year-old plantations were grazed once each year during the May to September grazing season. Estimates of current year's growth present in October, both inside and outside a livestock exclosure on each study plantation, were used to evaluate the effects of grazing. In general, utilization of brush by sheep was moderate to heavy, except in the spring of 1982, when brush was lightly utilized. Sheep grazing effectively reduced (p<0.01) both total understory plant growth and brush net current year's growth on all plantations. Reduced brush biomass on grazed areas was associated with greater Douglas-fir diameter growth in 1981-82 and 1982-83. By 1985, trees in grazed areas were 5% taller (p<0.05) and 7% greater in diameter (p<0.01) compared to ungrazed controls. Our data and observations suggest that sheep may be effectively used as a biological control agent for brush control in coastal Douglas-fir forests.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899647
    Scopus Count
    Collections
    Journal of Range Management, Volume 42, Number 1 (January 1989)

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