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    Improving Soil Water Retention and Nutrient Availability Using Carbon Inputs in Desert Croplands

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    Author
    Hoglund, Shelby Rae
    Issue Date
    2022
    Keywords
    Alkaline soil
    Biochar
    Compost
    Inorganic nitrogen
    Phosphate
    Water retention
    Advisor
    Blankinship, Joseph C.
    
    Metadata
    Show full item record
    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, presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Considering that the southwestern United States provides many of the specialty crops to feed the entire nation, it is vital to maximize use of water and fertilizer in croplands in this region. Meanwhile, intensifying droughts exacerbate cropland dependence on irrigation water. Therefore, solutions are needed to maintain cropland productivity. Adding carbon-rich organic amendments temporarily improves soil properties by increasing water and nutrient retention, but benefits are short-lived as organic amendments degrade quickly in hot, arid climates. Biochar is an organic amendment that can potentially improve long-term cropland soil health, which is the ability of soil to store and provide water and nutrients for plant growth. Biochar provides a relatively stable carbon source and can increase water and nutrient retention. Most studies on the effectiveness of biochar for these purposes have been conducted in temperate agroecosystems, but few studies examine effects of biochar on soil properties in croplands of the desert southwest U.S. Therefore, the purpose of this research is to deepen understanding of effects of carbon inputs (i.e. biochar and compost) to retain more water and provide plant-available nutrients in an irrigated desert cropland.
    Type
    text
    Electronic Dissertation
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Soil, Water & Environmental Science
    Degree Grantor
    University of Arizona
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