Nutrients from agriculture can be lost to the atmosphere as gaseous emissions such as ammonia, nitrous oxide, nitric oxide and dinitrogen. Other forms of nutrients, such as nitrates, may also be lost by leaching down into soils and possibly entering aquifers, or as organic molecules and solutes that can runoff into surface waters. These nutrient losses can pose risks to the environment and public health, and to society in general and because of this, the livestock sector is often under public scrutiny for its role in nutrient management. Producers who improve their on-farm nutrient management methods stand to benefit by reducing fertilizer use through incorporating nitrogen-fixing legumes, or extending their grazing to minimize manure spreading costs and gaseous losses.
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