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    Nitrate potential from sludge and inorganic fertilizer in soil leachate beneath an irrigated agricultural field

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    Author
    Reid, Mary Elizabeth,1943-
    Issue Date
    1990
    Keywords
    Hydrology.
    Nitrates -- Environmental aspects.
    Soils -- Leaching.
    Soils, Irrigated.
    Sewage sludge as fertilizer -- Environmental aspects.
    Committee Chair
    Pepper, Ian L.
    
    Metadata
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    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Two sets of continuous deep soil cores were removed from a 4 hectare field during the third year of crop treatment. Samples were removed once following sludge addition and once 6 weeks later following inorganic fertilizer application and a 30 cm pre-planting irrigation. A total of 504 soil samples were analyzed for soil texture, gravimetric moisture content, electrolytical conductivity, and pH, as well as concentrations of NO₃ , Cl⁻ , NO₂, and organic C. After three annual sludge applications, soil beneath plots amended with sludge, had higher average water-extractable NO3 concentration than plots amended with inorganic fertilizer. From one sampling date to the next, the field-averaged concentration of NO₃ increased from 282 mg 1⁻¹ to 335 mg 1⁻¹ . Results suggest a trend of increasing NO₃ in the vadose zone.
    Type
    Thesis-Reproduction (electronic)
    text
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Soil, Water and Environmental Science
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses
    Master's Theses

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