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    FATE AND TRANSPORT OF NITROGEN AT A DEEP ROW BIOSOLIDS APPLICATION HYBRID POPLAR TREE FARM

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    Date
    2012
    Author
    Maimone, Diana
    Advisor
    Felton, Gary K
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    Abstract
    This study evaluates deep row applied biosolids as a nutrient source for hybrid poplar trees grown on a gravel mine reclamation site in Brandywine, Maryland from November 2003 to April 2009. The study included biosolids application rates of 386, 773, and 1,159 dry Mg/ha (172, 345, and 517 dry ton/ac.) and hybrid poplar tree densities of 0, 716, and 1,074 trees/ha (0, 290, and 435 trees/ac.). Soil water samples taken from suction lysimeters located 15 - 120 cm (6 - 48 in.) vertically below the biosolids were analyzed for total ammoniacal-nitrogen (TAN) and nitrate-nitrogen (NO<sub>3</sub>-N). The majority (96.3%) of NO<sub>3</sub>-N values were less than EPA drinking water MCL of 10 mg/L. No NO<sub>3</sub>-N values within the tree plots exceeded 2 mg/L. The TAN concentrations increased with application rates, but decreased with distance from the biosolids, except there was no difference between 60 cm (24 in.) and 120 cm (48 in.).
    URI
    http://hdl.handle.net/1903/13491
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    • Environmental Science & Technology Theses and Dissertations
    • UMD Theses and Dissertations

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