Tillage and manure application practices significantly impact surface and ground water quality in Iowa and other Midwestern states. An integrated system approach to manure and tillage management is critical to ensure efficient nutrient use and improvement of soil and water quality. This approach, however, requires changes in manure application technology and tillage system management to ensure the success of an integrated system.
ISU (2005): Tillage, Manure Management and Water Quality. Ames, Iowa: Iowa State University (ISU) URL [Accessed: 01.05.2012]