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  • Interference of annual weeds in seedling alfalfa

    Creator:
    Fischer, Albert J.
    Abstract:
    The interference of barnyardgrass (Echinochloa crusgalli), pigweed (Amaranthus retroflexus),downy brome (Bromus tectorum),and tumble mustard (Sisymbrium altissimum) with alfalfa was studied. Alfalfa was seeded with each of the four weeds on August 14 and September 15, 1981, and on April 13, 1982. Alfalfa also was seeded on August 27, 1981, with...
    Resource Type:
    Masters Thesis
    Full Text:
    reviewing this manuscript and serving on my committee. Dr. R. Wrolstad and Dr. P. Bottomley for reviewing

  • Survival of fecal coliform bacteria in sludge-amended soils

    Creator:
    Hartel, Peter G.
    Abstract:
    A study was conducted to determine the effects or temperature, solar radiation, rainfall, and saturated flow on fecal coliform numbers in sewage sludge-amended soils. To determine this, four 4.6 X 13.7 m field plots were each amended in summer and in winter with 800 liters of anaerobically-digested sewage sludge, and...
    Resource Type:
    Dissertation
    Full Text:
    ACKNOWLEDGMENTS I thank C. Hagedorn and R. J. Seidler for their advice and my committee members, P. Bottomley, N

  • Evaluation of a Rhizobium meliloti transconjugant for increased nodulation and biological nitrogen fixation in alfalfa

    Creator:
    Mao, Meiyu
    Abstract:
    Agrobacterium rhizogenes has been shown to cause root proliferation and increased water use efficiency in certain woody dicots. Root proliferation may be desirable in herbaceous legumes as a means of increasing potential sites for infection by Rhizobium species and subsequent nodulation and nitrogen fixation. Thus, A. rhizogenes was used to...
    Resource Type:
    Masters Thesis
    Full Text:
    . They are: Dr. P.J. Bottomley, Dr. S.L. Ladd, and Dr. C.J. Weiser. My thanks are extended also to Dr

  • Early macronutrient uptake and partitioning in Glycine max L. Merr

    Creator:
    Schuttler, Patti L.
    Abstract:
    Soybeans were grown in hydroponic solutions and in perlite to devise procedures to measure plant mineral accumulation and solution depletion over time. Electron emission spectrometry and micro-Kjeldahl-autoanalyzer analytic techniques were used to monitor mineral content of individual plants and their corresponding solutions. An automated computer assisted system of converting raw...
    Resource Type:
    Masters Thesis
    Full Text:
    , for advice and encouragement. He was energetic, enthusiastic, and always positive. - Drs. P. J

  • Effect of selected lactic acid bacteria on the growth of food-borne pathogens and spoilage microorganisms in raw milk and milk products

    Creator:
    Al-Zoreky, Nageb
    Abstract:
    Several lactic acid bacteria (LAB) of the Lactococcus, Lactobacillus, Leuconostoc and Pediococcus genera were screened for inhibition of food-borne pathogens and spoilage microorganisms in raw milk and dairy products. Listeria monocytogenes was killed by Lactococcus lactis subsp. lactis and Pediococcus pentosaceus due to their production of bacteriocin-type inhibitors. Staphylococcus aureus...
    Resource Type:
    Dissertation
    Full Text:
    Technology Department, Professor P. Bottomley, Microbiology Department, and Professor D. Holtan, Animal

  • Malo-lactic fermentation of Leuconostoc isolates from Oregon wines

    Creator:
    Izuagbe, Yakubu Sule
    Resource Type:
    Dissertation
    Full Text:
    . P. J. Boctomley, Dr. W. Gamble and Dr. D. A. Heatherbell for their numerous suggestions and advice