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Filtering by: Alternative title ssim Row spacing, nitrogen affect bean yields Remove constraint Alternative title ssim: Row spacing, nitrogen affect bean yields Committee Member Stang, Jack Remove constraint Committee Member: Stang, Jack Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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  • Spring irrigation management of perennial ryegrass (Lolium perenne L.) seed production

    Creator:
    King, Craig Millhouser
    Abstract:
    Introduction of later maturing cultivars of perennial ryegrass (Lolium perenne L.) places more seed production fields in a period of drought common to Oregon during vital stages of reproductive development. During these stages, the final yield of the crop is largely determined by the number of seeds set, and the...
    Resource Type:
    Masters Thesis
    Full Text:
    affect leaf and stalk yields, but reduced ear yields. Kernel number was not affected by water deficit

  • Non-herbicidal effects of dinoseb on winter wheat yields

    Creator:
    Valverde, Bernal E.
    Abstract:
    A series of experiments were conducted from 1983 to 1985 to determine the effects of dinoseb [2-(1-methylpropyl)-4,6-dinitrophenol] on winter wheat (Triticum aestivum L. em Thell) yields. Field trials on dinoseb timing and dinoseb plus supplemental pesticides were established in an effort to elucidate the possible factors involved in the yield...
    Resource Type:
    Masters Thesis
    Full Text:
    . Sowing date did not significantly affect grain yields (Table 7). The effect of dinoseb timing on yield

  • Nursery container weeds response to modification of substrate pH, substrate particle size and applied nitrogen form

    Creator:
    Wada, Sugae
    Abstract:
    Experiments were conducted to determine the influence of cultural management practices on weed growth in nursery containers. Experiments 1 and 2 evaluated the effects of dolomitic lime rate and application method on substrate pH, creeping woodsorrel (Oxalis corniculata L.) establishment in containers, and growth of azalea (Rhododendron ‘Rosebud’) and pieris...
    Resource Type:
    Masters Thesis
    Full Text:
    Particle Size, and Applied Nitrogen Form. Abstract approved

  • Cereal residue effects on weeds and cucumbers

    Creator:
    Peachey, Ronald Edward
    Abstract:
    Cereal residues suppress the development of small seeded, summer annual weeds. The focus of this study was to determine whether cereal residues can be used to suppress weeds in cucumber production systems in the Pacific Northwest. In the first of three experiments, cereal residues of fall-planted, spring-killed cover crops suppressed...
    Resource Type:
    Masters Thesis
    Full Text:
    microenvironment of the crop seed. These effects may positively or negatively affect crop growth and yield. The

  • Spring irrigation management of tall fescue (Festuca arundinacea Schreb.) seed crops

    Creator:
    Orthel, Krista D.
    Abstract:
    Later maturing cultivars and increased ability to apply irrigation have led to inquiries by producers about proper irrigation management in tall fescue (Festuca arundinacea Schreb.) seed crops. The literature reveals little information about irrigation of perennial grass seed crops in general, and none about tall fescue in particular. Willamette Valley...
    Resource Type:
    Masters Thesis
    Full Text:
    irrigation and cultivar for yield but not for seed number and weight. In 2003, yields were increased by 13

  • Clonal variation in Russet Norkotah and Umatilla Russet potato varieties

    Creator:
    Brunick, Robert L.
    Abstract:
    These studies compared giant hill strains of Russet Norkotah and Umatilla Russet to the parent varieties. Selections were initially based on late maturity and increased vine vigor. Subsequent evaluations emphasized yield and quality parameters in comparison to the parent varieties. Giant hills were collected from the Columbia Basin and Central...
    Resource Type:
    Masters Thesis
    Full Text:
    . Giant hills with abnormally large vines are associated with increased yields. Yield increases are most

  • Weed control with glyphosate and glufosinate in herbicide-resistant sugarbeets (Beta vulgaris L.).

    Creator:
    Guza, Corey J.
    Abstract:
    Field studies were conducted in 1998 and 1999, to evaluate glyphosate and glufosinate for control of redroot pigweed, common lambsquarters, hairy nightshade, and barnyardgrass in herbicide-resistant sugarbeets. Treatments that included two or three applications of glyphosate, regardless of rate, or glyphosate applied once in combination with BAS 656 07 H...
    Resource Type:
    Masters Thesis
    Full Text:
    leaf sugarbeets. Sugarbeet yield with glyphosate treatments was greater than or equal to the standard

  • Spatial patterns of tree effects on pasture production in open canopied agroforests

    Creator:
    Harris, Norman Rex
    Resource Type:
    Masters Thesis
    Full Text:
    . Individual best-fit agroforest models predicted forage yields within 135 kg/ha (5.0, 5.8, and 8.9%) of

  • Winter cover cropping effects on integrative biological indicators of soil quality

    Creator:
    Ndiaye, Evelyne L.
    Abstract:
    Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...
    Resource Type:
    Masters Thesis
    Full Text:
    factors that affect farmers' motivation and ability to produce. Food supply also is affected by