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Filtering by: Committee Member Breen, P. J. Remove constraint Committee Member: Breen, P. J. Decade 1980-1989 Remove constraint Decade: 1980-1989

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  • The effects of light on photosynthesis and rooting of leafy cuttings of Pisum sativum L.

    Creator:
    Davis, Tim D.
    Abstract:
    The effects of light incident on leafy cuttings is quite complex because' light influences several factors which may affect root formation. One effect of light is to influence the carbohydrate status of the cutting by influencing photosynthesis. The role of current photosynthate in the rooting of leafy cuttings is uncertain....
    Resource Type:
    Masters Thesis
    Full Text:
    members Dr. Patrick J. Breen and Dr. David 0. Chilcote for critically reviewing this thesis and making

  • Influence of photosynthesis and carbohydrates on adventitious root formation by leafy cuttings

    Creator:
    Davis, Tim D.
    Abstract:
    Many investigators have suggested that current photosynthate supply can limit adventitious root formation on leafy cuttings. Accordingly, studies were undertaken to determine the effects of altering photosynthesis and carbohydrate levels on adventitious root formation by leafy cuttings of a number of different species. Pea cuttings rooted at high CO₂ (1800...
    Resource Type:
    Dissertation
    Full Text:
    my graduate committee members. Dr. Patrick J. Breen, Dr. Donald Copes, Dr. David Hannaway, and Dr

  • Polyamines and ethylene biosynthesis in pears during storage and ripening

    Creator:
    Toumadje, Arazdordi
    Resource Type:
    Dissertation
    Full Text:
    members: Dr. Patrick J. Breen, Dr. Adolph J. Ferro, Dr. Dereck J. Baisted, and Dr. Te May Ching for

  • Community organization and succession in rocky intertidal surfgrass beds

    Creator:
    Turner, Teresa
    Abstract:
    Succession and organization of rocky intertidal zone surfgrass beds (Phyllospadix scouleri Hook) were examined experimentally at two sites on the Oregon coast. The interaction of three attributes of the plant -- high persistence, high preemption, and slow recovery -- strongly influences the organization of surfgrass beds. Permanent plots indicate that...
    Resource Type:
    Dissertation
    Full Text:
    Turner ACKNOWLEDGEMENTS J. Lucas deserves special thanks. He helped with every apsect of this

  • The effect of structural modifications on energy conservation behaviors

    Creator:
    Beck, Becky Ohmer
    Abstract:
    This study focused on the relationship between energy related behaviors prior to and following structural modifications of the residence. If energy saving structural modifications are made, will there also be a concommitant change in energy conserving behavioral practices? The objectives of this study were: 1) to create a profile of...
    Resource Type:
    Masters Thesis
    Full Text:
    and guidance; Dr. J. P. (Phil) O'Neill for his inspiration and endless support; and Dr. Ed Strow

  • An evaluation of the use of tarif tables in second growth Douglas-fir

    Creator:
    Marshall, David D.
    Abstract:
    The Washington State Department of Natural Resources' Comprehensive Tree-Volume Tarif Tables are a set of preconstructed local volume tables. This can increase "on plot" efficiency since only diameters are necessary to obtain volumes after the proper table for the given diameter/height relationship is accessed. The tables are accessed and indexed...
    Resource Type:
    Masters Thesis

  • Hydrological parameters affecting overland flow in an agricultural watershed

    Creator:
    Lowery, Birl
    Abstract:
    Surface and subsurface hydrological parameters affecting overland flow from cultivated land were studied in three small sub-watersheds located in the western foothills of the Willamette Valley. The sub-watersheds, which ranged in size from 0.46 to 6.0-ha, were fall-planted to grass or small grain. The parameters studied were infiltration, rainfall, runoff...
    Resource Type:
    Dissertation
    Full Text:
    encouragement. Appreciation is extended to Dr. J. A. Vomocil, Dr. M. J. English and Dr. D. P. Lavender for

  • Interaction of selected herbicides with soil constituents

    Creator:
    El-Madhun, Yousef Abdel Wahab
    Abstract:
    The behavior of six herbicides in soil was studied under controlled laboratory conditions. Sorption of bromacil, chiorotoluron and diuron was assessed by the batch equilibration procedure over a broad range of aqueous phase sorbate concentration. Linear equilibrium sorption constants (K[subscript p]) were slightly higher at 4° C than at 25°...
    Resource Type:
    Dissertation
    Full Text:
    . Baham, Dr. A. P. Appleby, and Dr. I. J. Tinsley for their helpful comments and for serving on my

  • 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:
    established for phosphorus (P), as a constituent of nucleotides, and its impact on nodulation, nitrogen

  • Water quality impacts of free ranging cattle in semi-arid environments

    Creator:
    Larsen, Royce E.
    Abstract:
    The purpose of this study was to evaluate the effects that free ranging cattle have on water quality in semi-arid environments. There were three specific objectives: 1) To determine the concentration and distribution of cattle feces in meadows, riparian zones, and the associated uplands. 2) To determine the fecal deposition...
    Resource Type:
    Masters Thesis