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  • Historical land use and its impact on Oak Creek, Oregon

    Creator:
    Yamaguchi, Keiko, 1964-
    Abstract:
    The purposes of this study were:1) to review the land use history of Oak Creek watershed since European settlement. And 2) to consider the human-caused impacts and their effects associated with different land uses. The study area was classified into three land use patterns: residential,agricultural, and forested areas.Since the European...
    Resource Type:
    Masters Thesis
    Full Text:
    Yamaguchi A THESIS submitted to Oregon State University in partial fulfillment of the requirements for

  • Computer simulation of beef cattle production systems in the Llanos of Columbia

    Creator:
    Levine, Joel Martin
    Abstract:
    A simulation model capable of execution on a programmable calculator was developed to study voluntary intake, liveweight change, and fertility of grade Zebu cows in the Llanos of Colombia. Organic nitrogen in the diet and meta bolic weight were used to predict intake; age, liveweight, and energy concentration were the...
    Resource Type:
    Dissertation
    Full Text:
    State University: Drs. A. Ralston, A. G. Nelson, K. Rowe, J. Renden, D. Thomas, and J. E. Oldfield for

  • The effects of ultra-hydrostatic pressurization of pre-rigor muscle on characteristics of economic importance

    Creator:
    Ali, Elgasim Elgasim
    Abstract:
    This study was designed to confirm or refute the tenderizing effect of ultra-hydrostatic pressure on warm excised pre-rigor muscle, plus to take a thorough look at its effect on some meat characteristics of economic importance. Samples for the experiment were obtained from animals (cattle and sheep) slaughtered at Oregon State...
    Resource Type:
    Masters Thesis
    Full Text:
    graduate committee, Dr. J. E. Oldfield, Dr. A. F. Anglemier and Dr. B. E. Coblentz. I am indebted to my

  • The effect of electrical current on bacteria on beef carcasses, on agar media and in suspensions

    Creator:
    Lin, Chih-kai Jimmy
    Abstract:
    Electrical stimulation of beef carcasses (n=18) did not cause a significant reduction in microbial population on three different sampling positions immediately following slaughter. In constrast, significant microbial reduction (P > 0.05) was found at position 2 (muscle above aitch bone), but not at position 1 (inside of neck) or position...
    Resource Type:
    Masters Thesis
    Full Text:
    graduate committee, Professor J. E. Oldfield, Professor A. F. Anglemier, and Associate Professor B. E

  • Nutritional aspects of artificially feeding captive and wild deer

    Creator:
    Dean, Ronald E.
    Abstract:
    Most of the nutritionally related difficulties of winter feeding deer apparently result from either poor acceptability of artificial rations or digestive disturbances that result from feeding starved animals feeds to which they are not accustomed. Reported in this thesis are studies conducted with both captive and wild deer concerning acceptability...
    Resource Type:
    Dissertation
    Full Text:
    Deer by Ronald Edward. Dean A THESIS submitted to Oregon State University in partial fulfillment

  • The effect of various additives on nutritive value of ryegrass straw silage

    Creator:
    Shultz, Thomas Anthony
    Abstract:
    Observations were made on silage pH, chemical composition and 24hr in vitro dry matter digestion (IVDMD) to evaluate effects of various additives ensiled with annual ryegrass straw. Additives were compared in factorial designed trials utilizing .95 1 glass jar silos. Selection of additives used in each subsequent trial was based...
    Resource Type:
    Dissertation
    Full Text:
    graduate committee, Drs. D. C. Church, J. E. Oldfield, W. S. McGuire, and J. A. Harper, for their valued

  • Cow calf confinement energy levels

    Creator:
    Price, David P.
    Resource Type:
    Dissertation
    Full Text:
    December 6, 1976 Title: COW-CALF CONFINEMENT ENERGY LEVELS Redacted for Privacy A. T. Ralston Abstract

  • Seasonal cattle and sheep diets on Festuca arundinacea-Trifolium subterraneum and Lolium perenne-Trifolium subterraneum pastures in western Oregon

    Creator:
    Bedell, Thomas E.
    Abstract:
    Sheep and cattle dietary preferences were determined on tall fescue-subclover ( Festuca arundinacea-Trifolium subterraneum) and perennial ryegrass-subclover (Lolium perenne-Trifoliuni subterraneum) pastures in western Oregon during the spring and summer periods of 1964 and 1965. Esophageal-fistulated Willamette ewes and Hereford and Hereford-Angus yearling cattle were grazed separately on each pasture mixture...
    Resource Type:
    Dissertation
    Full Text:
    Dr. C. E. Poulton, Dr. W. S McGuire, Dr. J. E. Oldfield and Dr. A. T. Ralston is gratefully

  • In vitro and in vivo evaluations of chemically treated ryegrass straw

    Creator:
    Anderson, Daniel Craig
    Abstract:
    Seven in vitro trials were conducted to compare the effects of soaking annual ryegrass straw in solutions of sodium hydroxide (Na₄OH), potassium hydroxide (KOH), ammonium hydroxide (NH₄OH), or sodium formate (NaCHO₂) at varying levels. Dry matter digestibility (DDM) was the criterion used to measure treatment response. A 3 x 3...
    Resource Type:
    Dissertation
    Full Text:
    must also be given to Drs. J. E. Oldfield, P. H. Weswig, D. O. Chilcote and R. A. Schmitt, who

  • The effects of aerobic and anaerobic fermentation on the nutritive value of ryegrass straw

    Creator:
    Jones, Steven Ryan
    Abstract:
    A series of in vitro laboratory trials and in vivo sheep digestion trials were used to evaluate aerobically or anaerobically fermented perennial ryegrass straw. The laboratory trials consisted of a silage study, where mini-silos were used in a 9 X 2 factorial design with nine levels of whey (0 to...
    Resource Type:
    Dissertation
    Full Text:
    : Prof. Manning H, Becker, Dr. J. E. Oldfield, Dr. L. R. Vough and Dr. A. W. Anderson. My hardiest