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Filtering by: Conference section Forage (Hay) Insects Remove constraint Conference section: Forage (Hay) Insects Advisor Krueger, William C. Remove constraint Advisor: Krueger, William C.

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  • Use of livestock to improve the quality of elk winter range forage in northeastern Oregon

    Creator:
    Clark, Patrick Eugene
    Abstract:
    The effects of late spring defoliation on the winter forage quality of bluebunch wheatgrass (Agropyron spicatum [Pursh] Scribn. & Smith), Idaho fescue (Festuca idahoensis Elmer) and elk sedge (Carex geyeri Boott) and the response of wintering Rocky Mountain elk (Cervus elaphus nelsoni Bailey) to changes in winter range forage quality...
    Resource Type:
    Dissertation
    Full Text:
    Forage in Northeastern Oregon AN ABSTRACT OF THE DISSERTATION OF Patrick Eugene Clark for the degree

  • Quality of bluebunch wheatgrass (Agropyron spicatum) as a winter range forage for Rocky Mountain Elk (Cervus elaphus nelsoni) in the Blue Mountains of Oregon

    Creator:
    Bryant, Larry Duane
    Abstract:
    This research was conducted on three study areas on elk winter ranges in Northeast Oregon. One was on the Starkey Experimental Forest and Range and the others were in the same vicinity. Plant appendages, spring and fall defoliation and fall growth of bluebunch wheatgrass were evaluated in terms of quality...
    Resource Type:
    Dissertation
    Full Text:
    winter range forage for Rocky Mountain Elk (Cervus elaphus nelsoni) in the Blue Mountains of Oregon AN

  • Conditioning bunchgrass on elk winter range

    Creator:
    Westenskow, Kathy Jo
    Abstract:
    Research was conducted near the Starkey Experimental Forest and Range in northeastern Oregon. Effects of defoliating bluebunch wheatgrass (Agropyron spicatum (Pursh) Scribn. and Smith) to increase the quality of regrowth available on elk (Cervus elaphus nelsoni) winter range were studied from 1988 through 1990. Clipping treatments were implemented to condition...
    Resource Type:
    Masters Thesis
    Full Text:
    range were studied from 1988 through 1990. Clipping treatments were implemented to condition the forage

  • Ecological relationships between cervid herbivory and understory vegetation in old-growth Sitka spruce-western hemlock forests in western Washington

    Creator:
    Happe, Patricia Jenkins
    Abstract:
    The relationships between black-tailed deer (Odocoileus hemionus columbianus) and Roosevelt elk (Cervus elaphus roosevelti) herbivory and understory vegetation in unmanaged forests in Olympic National Park were studied from 1985 - 1989. From 1985 to 1986 I studied the impact of cervid exclusion on shrub, fern, and forb forage quality, tannin...
    Resource Type:
    Dissertation
    Full Text:
    to 1986 I studied the impact of cervid exclusion on shrub, fern, and forb forage quality, tannin

  • 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:
    dates among treatments. Grazing significantly depressed total forage yields in each year. However

  • Application of nonequilibrium ecology to managed riparian ecosystems

    Creator:
    Stringham, Tamzen K.
    Abstract:
    Seasonal trends in water table level and soil moisture for four plant community types within an irrigated eastern Oregon riparian zone were described. Aboveground biomass, species composition, litter, percent bareground and percent basal cover of key plant species and life forms were measured. The relationship between water table levels and...
    Resource Type:
    Dissertation
    Full Text:
    within the non-irrigated meadow. Management impact on plant community attributes, forage

  • Grazing behavior and distribution of cattle on mountain rangelands

    Creator:
    Gillen, Robert L.
    Abstract:
    Several aspects of cattle grazing behavior and distribution were studied on mountain rangeland dominated by ponderosa pine- Douglas fir, mixed conifer, and white fir forest communities in northeastern Oregon. The association between upland distribution, determined by forage utilization and by direct cattle observation, and several habitat factors was studied through...
    Resource Type:
    Dissertation
    Full Text:
    between upland distribution, determined by forage utilization and by direct cattle observation, and

  • A comparison of four methods used in determining the diets of large herbivores

    Creator:
    McInnis, Michael Lindsay
    Abstract:
    Esophageal fistulation, stomach content analysis, fecal analysis, and ocular-estimate-by-plot are four of the most publicized methods of determining the diets of large herbivores. The principal objective of this study was to compare the relative values of each of these methods based upon information collected from bi-fistulated (esophageal and rumen) sheep...
    Resource Type:
    Masters Thesis
    Full Text:
    information collected from bi-fistulated (esopha- geal and rumen) sheep selecting their own forage from a

  • Nutritional value of several Opuntia species

    Creator:
    Ben-Thlija, Abdellaziz
    Abstract:
    Little is known about cactus nutrients, their proportions in different species and the variability of these proportions with season. In the scant literature available on Opuntia species, no systematic survey has been published to document and compare the nutritional qualities of different species. Also, no studies have been done to...
    Resource Type:
    Masters Thesis
    Full Text:
    dry matter and crude protein digestibility than grass hay samples (Agropyron cristatum and Bromus

  • Quantifying the impacts of riparian cattle grazing at Soap Creek Ranch near Corvallis, Oregon

    Creator:
    McArthur, Cynthia
    Abstract:
    A documented case history of riparian grazing at Oregon State University's Soap Creek Ranch was conducted from 1999 to 2001. Impacts of four different riparian grazing treatments were evaluated. Emphasis was placed on investigating the relationship between riparian cattle use and water quality. Through a series of carefully designed and...
    Resource Type:
    Masters Thesis
    Full Text:
    affected (1) riparian forage grass utilization; (2) woody shrub cover and density; (3) streambank