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Manure Management Georgia Agricultural Curriculum Offices June 2011 Positives of Manure • Can be used as a fertilizer to enrich the soil • Cuts down on waste from farms Manure Pollution • When not managed properly, manure has several properties that have the potential to directly or indirectly contaminate the air, soil, and water Air Pollution • Can be cause directly or indirectly by the release of methane gas, ammonia, nitrogenous gases, and noxious odors from feces and urine • Also, it can be cause by anaerobic conditions in stored manure, inadequate storage conditions, or by having too many animals in too small a place Soil Pollution • Can be caused if excessive amounts of the heavy metals in manure (zinc and copper) get into the soil or when the levels of nitrogen or phosphorous in the soil become excessive • This can be caused by too heavy of an application of manure or the build up of manure over the years of application • Can be avoided by a proper monitoring of soil nutrient levels at regular intervals Water Pollution • Can be caused by harmful bacteria in runoff of manure from feedlots • Nitrates from stored manure that has leached through the soil are the main source of pollution • Manure that has been spilled or improperly spread on land too close to water sources can also cause water pollution