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Filtering by: Committee Member Li, H. W. Remove constraint Committee Member: Li, H. W. Academic Affiliation Rangeland Resources Remove constraint Academic Affiliation: Rangeland Resources

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  • Silvicultural impacts of sheep grazing in Oregon's Coast Range

    Creator:
    Leininger, Wayne C.
    Abstract:
    A three-year investigation was conducted during 1980-1982 to evaluate the potential of using herded sheep as a silvicultural tool to suppress brush in Douglas-fir (Pseudotsuga menziesii) plantations of Oregon's Coast Range. Sheep browsing of Douglas-fir was highest in May soon after bud break. Averaged over the 2 years of grazing,...
    Resource Type:
    Dissertation
    Full Text:
    . Beschta, W. H. Emmingham, and H. F. Horton. Dr. W. C. Krueger was also very helpful during my tenure at

  • Seasonal response of bitterbrush to burning and clipping in eastern Oregon

    Creator:
    Clark, Robert G.
    Abstract:
    Bitterbrush [Purshia tridentata (Pursh) DC] plants were burned or clipped, fall and spring, under different soil moisture conditions on two sites in east-central Oregon. Treatments, on plants of an erect growth form on the Juniperus/Artemisia-Purshia site resulted in 38% of the fall-clipped and 40% of the spring-clipped plants sprouting. None...
    Resource Type:
    Masters Thesis
    Full Text:
    other members of my committee, Dr. W. C. Krueger, Dr. E. E. Starkey, and Dr. A. H. Winward, for their

  • Responses of vegetation and sheep to three grazing pressures

    Creator:
    Thetford, Frank Oren
    Abstract:
    A study was conducted over a two year period, 1973 through 1974, on perennial ryegrass-subclover pastures with stocking rates of 7.4 (moderate), 9. 9 (heavy), and 12.4 (overstocked) ewes per hectare to establish guidelines on stocking intensity for dryland improved pastures in western Oregon. Climatic conditions varied annually and caused...
    Resource Type:
    Dissertation
    Full Text:
    be completed. I would like to thank the members of the committee, Drs. William C. Krueger, Alma H