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  • Nitrogen fertigation practices to optimize growth and yield of northern highbush blueberry (Vaccinium corymbosum L.)

    Creator:
    Vargas, Oscar L.
    Abstract:
    Northern highbush blueberry is a long-lived perennial crop that is well adapted to low soil pH conditions. The plants are often shallow rooted and absorb primarily the ammonium (NH₄) form of nitrogen (N) rather than nitrate-N (NO₃-N). Traditionally, commercial blueberry fields have been irrigated with overhead sprinklers and fertilized using...
    Resource Type:
    Dissertation
    Full Text:
    studies were conducted in western Oregon to compare fertigation to granular fertilizers and to develop

  • Weed, water, and nutrient management practices for organic blackberry during establishment

    Creator:
    Harkins, Renee H.
    Abstract:
    The study was conducted in an organic trailing blackberry (Rubus L. subgenus Rubus, Watson) planting established at the North Willamette Research and Extension Center in Aurora, OR on 26 May 2010. Three weed management systems were compared for 'Marion' and 'Black Diamond': 1) non-weeded; 2) hand-hoed two to three times...
    Resource Type:
    Masters Thesis
    Full Text:
    nutrient trends, soil sampling should be completed in-row, under the drip emitters where fertilizer is

  • Serial manure amendments : effects on soil properties and root rot of sweet corn

    Creator:
    Cox, Bonnie S. Hoffman
    Abstract:
    The effect of serial (multiple-year) organic matter (OM) amendment on soil properties has been described in some cropping systems, although less is known about the effect of serially amended field soils on soil-borne plant diseases. The objectives of this study were to describe the effects of the third and fourth...
    Resource Type:
    Masters Thesis
    Full Text:
    Properties and Root Rot of Sweet Corn by Bonnie S. Hoffman Cox A THESIS submitted to Oregon State

  • Improving nitrogen management with cover crops in organic broccoli production

    Creator:
    Garrett, Amy
    Abstract:
    Legume cover crops can serve as important sources of nitrogen (N) in sustainable agriculture and can be economically beneficial when fertilizer inputs are reduced without a yield reduction. Synchronizing N mineralization from organic materials with the needs of the subsequent crop is a challenge for organic growers. Predicting plant available...
    Resource Type:
    Masters Thesis
    Full Text:
    sustainable agriculture and can be economically beneficial when fertilizer inputs are reduced without a