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  • Ammonia Volatilization from Nitrogen Fertilizers and Wastewater Reuse in the Columbia Basin

    Creator:
    Del Moro, Sarah K.
    Abstract:
    Ammonia (NH₃) volatilization and loss from nitrogen (N) fertilizer in agriculture negatively impacts crops, farm profitability, human health and surrounding ecosystems where it is deposited. A significant source of NH₃ volatilization occurs from surface application of urea on sandy soils with low pH buffering capacity such as those in the...
    Resource Type:
    Masters Thesis
    Full Text:
    that use urea as a primary N fertilizer source. Ammonia volatilization is also an important loss

  • Daily and alternate day supplementation of urea of biuret to ruminants consuming low-quality forage

    Creator:
    Currier, Thomas A.
    Abstract:
    Data is limited evaluating infrequent supplementation of urea or biuret to ruminants consuming low-quality forage (<6% crude protein). Therefore, a series of experiments were designed to compare the effects of daily (D) and alternate day (2D) supplementation of two non-protein nitrogen (NPN) sources (urea or biuret) to ruminants consuming low-quality...
    Resource Type:
    Masters Thesis
    Full Text:
    for urea as SF decreased compared with biuret. Ruminal NH3-N on the day only daily supplements were

  • Development of a mobile process to extract phosphorus from livestock wastes as a valuable fertilizer

    Creator:
    Hoilman, Gene
    Abstract:
    Environmental and regulatory concerns are causing confined animal feeding operations (CAFO's) to account for phosphorous content when applying wastewater to agricultural fields for disposal. In most cases this requires more land to spread the waste onto so that the phosphorous needs of the crop are not exceeded. A mobile process...
    Resource Type:
    Masters Thesis
    Full Text:
    : Development of a Mobile Process to Extract Phosphorous from Livestock Wastes as a Valuable Fertilizer rt IV

  • An ammonia stripping and recovery system for animal wastewaters

    Creator:
    Crown, Julia K.
    Abstract:
    Traditionally, livestock operations were small and combined with cropping operations. This allowed farms to be self-sustaining because nutrients were constantly recycled on the farm. Since the Haber-Bosch chemical process was patented, crop farmers turn to industrial fertilizers when soils nutrients are depleted. Animal and plant operations diverged, functionally separated, and...
    Resource Type:
    Masters Thesis
    Full Text:
    great quantities, as in fertilizer runoff, a great growth of biological material, such as algae in