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Filtering by: Creator Wilson, Gregory R. Remove constraint Creator: Wilson, Gregory R. Creator Cao, Weidong Remove constraint Creator: Cao, Weidong Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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  • 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:
    monitoring nitrate and pesticide flux before they reach the groundwater through the field study (Wilson

  • Development of an expert system for irrigation and fertilization management in the Pacific Northwest

    Creator:
    Cao, Weidong
    Abstract:
    Recent advances in computer technology have made possible the development of expert systems. Expert systems are computer programs that perform at the level of a human expert. Expert systems can help integrate and apply diverse sources of information and expertise to problems of integrated crop management. A prototype Crop Management...
    Resource Type:
    Masters Thesis
    Full Text:
    water, and crop yield can be expressed by the following equation (McClendon et al., 1989): R-Y*P-14