World Pork Expo 2012: Valuing manure nutrients

Agriculture’s environmental impact is becoming a focal point for US consumers, governments, the public and the farmers. As pork producers look forward to the 2012 World Pork Expo, many are interested in the high demand for manure as a source of plant nutrients and organic material for crop farmers.     “The most common method of valuing fertiliser is component pricing,” says Kelvin Leibold, a farm management specialist with Iowa State University (ISU) Extension. &ldq