Tillage, nutrient and manure management have a significant impact on surface and groundwater quality, especially surface water runoff. In order to meet the designated criteria set by the TMDL rules for the State of Iowa for over 157 impaired water bodies, soil erosion control and residue management, along with manure management, have to be a priority. A recent tillage survey sponsored by the Iowa Resource Management Partnership (IRMP) committee in 1999, and published in 2000, indicated the need for improvement in adopting conservation practices. The survey shows no increase in conservation tillage practice (i.e., no-till) for the period of 1997- 1999. Residue management is one of the critical components in soil erosion control that can be introduced as one of the potential ideas to expand on and incorporate with other educational efforts that have been put forward by IDALS, the DNR and Iowa State University.
Available at: http://works.bepress.com/mark-licht/108/