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Leytem A, Kleinmann P, Dell C, Pote D. Subsurface Injection of Manure to Reduce Ammonia Losses and Odor. https://www.ars.usda.gov/ARSUserFiles/np212/LivestockGRACEnet/ManureInjection.pdf (accessed Oct 23, 2020).
Leytem A, Kleinmann P, Dell C, Pote D. Subsurface Injection of Manure to Reduce Ammonia Losses and Odor. https://www.ars.usda.gov/ARSUserFiles/np212/LivestockGRACEnet/ManureInjection.pdf (accessed Oct 23, 2020).