A balancing act - mineral requirements versus environmental pollution
As pig barns have become larger and amassed several thousands of pigs per operation, there is a growing concern about the millions of tonnes of waste effluent from nitrogen, phosphorus, potassium, and high trace mineral concentrations that are produced each year. Requests to the swine industry are increasing to take responsible action in order to reduce this source of pollution.
Source: Volume 24, No. 6
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