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Filtering by: Committee Member Perry, Dave Remove constraint Committee Member: Perry, Dave Committee Member Perry, Dave Remove constraint Committee Member: Perry, Dave Subject Plant competition -- Oregon Remove constraint Subject: Plant competition -- Oregon

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  • Effect of western juniper removal on ponderosa pine and associated understory vegetation

    Creator:
    Rose, Jeffrey A.
    Abstract:
    This research assessed the effect of western juniper (Junlperus occldentalls) removal on understory plant production and cover and ponderosa pine (Pinus ponderosa) growth and plant water status. A complete randomized block design, with four blocks and four treatments was established in the summer of 1984 near Prineville, Oregon. The four...
    Resource Type:
    Masters Thesis
    Full Text:
    , without letting me stray too far. Thanks to my committee members Drs. William Krueger, Dave Perry, and

  • Interspecific competition in young Douglas-fir plantations of the Oregon coast range

    Creator:
    Wagner, Robert Gordon
    Abstract:
    Improving vegetation management decisions in Pacific Northwest forests requires a better understanding of the interactions between planted conifers and associated vegetation. A practical index of interspecific competition, and quantitative models predicting conifer performance from such an index are particularly needed. To meet this need, neighborhood models of interspecific competition were...
    Resource Type:
    Dissertation

  • Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

    Creator:
    Riegel, Gregg M.
    Abstract:
    The objective of this research was to determine which environmental resources, light, water, and nutrients, control understory plant production and composition in a Pinus ponderosa forest in northeastern Oregon. A split-plot experimental design, with three blocks, four treatments, and 44 plots, was established in the summer of 1985. Twenty plots...
    Resource Type:
    Dissertation
    Full Text:
    . Thanks Rick! I thank my committee members Drs. Bill Emmingham, Bill Krueger, and Dave Perry for their