Search Constraints

Start Over
Filtering by: Creator Steenhuis, Tammo S. Remove constraint Creator: Steenhuis, Tammo S. Committee Member English, Marshall Remove constraint Committee Member: English, Marshall

Search Results

  • Nitrate and pesticide transport under pear production in clay and sandy soil

    Creator:
    Cao, Weidong
    Abstract:
    Groundwater contamination on irrigated land is of concern in this nation and around the world. In order to reduce the potential of groundwater contamination by agricultural practices such as irrigation, fertilizer and pesticide application, vadose-zone monitoring and sampling are needed. The main objective of this study was to evaluate impacts...
    Resource Type:
    Masters Thesis
    Full Text:
    Production in Clay and Sandy Soil Abstract Approved: n S. Selker, Assistant Professor Groundwater

  • Assessment of variability and monitoring methods for leaching under cover crop management

    Creator:
    Hess, Mario
    Abstract:
    The contamination of ground water resources represents a serious problem and a prominent threat to the health of our society. This study focuses on the leaching of inorganic anions as a function of agricultural practices under natural field conditions. In order to enhance the understanding of such leaching processes, this...
    Resource Type:
    Masters Thesis
    Full Text:
    leben kann. Acknowledgments First of all, I want to thank Dr. John S. Selker, my advisor, for his

  • Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

    Creator:
    Smesrud, Jason K.
    Abstract:
    The agricultural production of peppermint has been shown to contribute significant quantities of nitrate-nitrogen to groundwater recharge. In an effort to provide new tools for increasing nitrogen efficiency within peppermint production, three research questions were proposed: i) How should plant tissue samples be collected to achieve the greatest precision when...
    Resource Type:
    Masters Thesis
    Full Text:
    : John S. Selker The agricultural production of peppermint has been shown to contribute significant

  • Evaluation of techniques for on-farm monitoring of percolation and irrigation system performance

    Creator:
    Louie, Michael J.
    Abstract:
    Efficient use of water in agricultural production involves accurate assessment and control of the quantity and spatial uniformity of excess percolation. Passive Capillary Samplers (PCAPS), which sample water from the vadose zone have shown potential to provide superior estimates of soil water flux compared to alternative methods. In a four-year...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: John S. Selker Abstract approved: Jonathan D. Istok Efficient use of water in agricultural