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Filtering by: Creator Hauck, M. Remove constraint Creator: Hauck, M. Degree Field Horticulture Remove constraint Degree Field: Horticulture Resource Type Dissertation Remove constraint Resource Type: Dissertation

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  • Nitrogen partitioning and remobilization in field-grown apple trees

    Creator:
    Khemira, Habib
    Abstract:
    Uptake and cycling of nitrogen (N) in mature trees are not well understood. Fertilizer-N uptake, partitioning, and use-efficiency were studied in standard strain 'Topred Delicious' and spur strain 'Redspur Delicious' mature apple trees {Malus domestica Borck) on 'Malling 7A' (M.7A) rootstocks. The treatments consisted of a ground application in spring,...
    Resource Type:
    Dissertation
    Full Text:
    Delicious' mature apple trees {Malm domestica Borck) on 'Mailing 7A' (M.7A) rootstocks. The treatments

  • Alternative orchard floor management practices, soil quality, nitrogen fertilizeruptake, and apple tree growth and yield

    Creator:
    McDonald, Sarah Finger
    Abstract:
    Orchard floor management (OFM) practices can improve soil function and alter the soil biological community. Soil function is dependent on soil forming materials and on management practices but little is known about how OFM affect orchard soil quality, fertilizer N uptake, or tree growth and production. Research plots were located...
    Resource Type:
    Dissertation
    Full Text:
    dwarfing M26EMLA rootstock) and Hood River, OR (HR) (M. x domestica  ‘Red Delicious’ grafted on M7EMLA

  • Nitrogen use in container-grown woody ornamentals

    Creator:
    Sandrock, David Ray, 1971-
    Abstract:
    Lasting, effective solutions to nitrogen (N) loss from container nurseries must address layers of complexity ranging in scale from whole system nursery management to gene expression. Group-based On-site Active Learning (GOAL) was developed to aid nursery managers and related stakeholders (e.g. neighbors, policy makers, regulating agencies, researchers) in developing a...
    Resource Type:
    Dissertation
    Full Text:
    determinations of N fertilizers can be made more accurately (Hauck and Bremner, 1976) and treatment effects are

  • Nitrogen dynamics in field grown comice pears

    Creator:
    Sanchez, Enrique E.
    Abstract:
    The dynamics of N was studied in field grown Comice/Provence quince BA29 pears in Medford, Oregon. Total tree biomass, N content, and ¹⁵N evaluations suggest that young pears require little N (48 kg N ha⁻¹ yr⁻¹). About 45% of total tree N present in dormant trees was remobilized into new...
    Resource Type:
    Dissertation
    Full Text:
    positions. Codes are as follows: W - west, S =• south, N - north, E - east; M - middle, T - top, B

  • Water and Soil Management Practices to Enhance Plant Growth, Berry Development, and Fruit Quality of Northern Highbush Blueberry (Vaccinium corymbosum L.)

    Creator:
    Almutairi, Khalid F.
    Abstract:
    Drought and mandatory water restrictions are limiting the availability of irrigation water in many important blueberry growing regions and new strategies are needed to maintain yield and fruit quality with less water. Three potential options for reducing water use, including deficit irrigation, irrigation cut-offs, and crop thinning, were evaluated for...
    Resource Type:
    Dissertation
    Full Text:
    ) reported that more than 90% of fine roots are located the top 0.3 m, with the highest root density at 0.1