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Effects of Rock Powder Additions to Cattle Slurry on Ammonia and Greenhouse Gas Emissions

Maria Eunice Paulade Souza, André Mundstock Xavierde Carvalho, Daniely de Cássia Deliberali, Ivo Jucksch, George Gardner Brown, Eduardo Sá Mendonça, Irene Maria Cardoso Abstract For several decades, farmers have been mixing rock powders with livestock slurry to reduce its NH3 emissions and increase its nutrient content. However, mixing rock powders with slurry is controversial, and there is currently no scientific evidence for its effects on NH3 and greenhouse gas (GHG) emissions or on changes in its nutrient content due to element release from rock powders. The major aim of this study was therefore to analyze the effects of mixing two ...