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Filtering by: Committee Member Powelson, R. L. Remove constraint Committee Member: Powelson, R. L. Advisor Grabe, Don F. Remove constraint Advisor: Grabe, Don F.

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  • Spring establishment of orchardgrass and tall fescue seed crops with cereal companion crops

    Creator:
    Chastain, Thomas G.
    Abstract:
    Orchardgrass and tall fescue seed crops are commonly springplanted in Oregon, but do not produce a marketable crop during the first growing season. Establishing orchardgrass and tall fescue with cereal companion crops would provide income during the seeding year and could increase seed production profits. This study was conducted to...
    Resource Type:
    Dissertation
    Full Text:
    increased stomatal resistance (L r ) and reduced transpiration rate (TR) on 10 June 1986 (Table 1.5

  • Grass seed quality in relation to time of windrowing

    Creator:
    Dübbern de Souza, Francisco Humberto
    Abstract:
    This study was undertaken to obtain information on the quality of grass seed when windrowed at the high moisture levels necessary for obtaining maximum yields. A secondary goal was to monitor moisture and temperature fluctuations in the windrow and to relate their effects to development and deterioration of the seed....
    Resource Type:
    Masters Thesis
    Full Text:
    friendship and collaboration; Dr. K. L. Chambers, Dr. R. Highsmith, and Dr. H. W. Youngberg, for serving

  • Germination and dormancy of meadowfoam seed

    Creator:
    Mmolawa, Onesimus B.
    Abstract:
    Meadowfoam (Limnanthes spp.) is a potential oil seed crop being developed for commercial production in the Willamette Valley. The seeds are characterized by poor germination at warm temperatures. It would be desirable to overcome this temperature-related dormancy problem so that better stand establishment could be realized from early fall planting....
    Resource Type:
    Masters Thesis
    Full Text:
    with different-aged seed lots of L. alba 'Mermaid,' L. floccosa Howell and a cross of L. floccosa x L

  • Osmotic stress vigor test for wheat seed

    Creator:
    Currans, Sean
    Abstract:
    Seed vigor tests have been developed to evaluate the relative ability of seed lots to produce stands of seedlings in the field. Some workers have suggested the possibility of differentiating vigor levels by germinating seeds under osmotic stress, but have not conducted field trials to evaluate the usefulness of the...
    Resource Type:
    Masters Thesis
    Full Text:
    signifi- cantly correlated with field emergence of artificially aged (r .85) and naturally aged seeds (r

  • Effect of moisture stress on yield and quality of winter wheat seed

    Creator:
    Assuncao, Marcos Vinicius
    Abstract:
    Two experiments were conducted to determine the effects of moisture stress on physiological changes that occur during the vegetative and reproductive stages of the wheat (Triticum aestivum L.) plant, and to relate these effects to seed yield, quality and performance. In a field experiment, different levels of moisture stress were...
    Resource Type:
    Dissertation
    Full Text:
    . Bolton, Dr. D. 0. Chilcote, Dr. D. J. Armstrong, Dr. L. D. Koller and Dr. Jack R. Stang for serving as