//-->
Affecting Farmers' Use of Practices to Reduce Commercial Fertilizers and Pesticides
Lasley, Paul M., (1990)
An Economic Comparison of Organic and Conventional Grain Crops in a Long-Term Agroecological Research (Ltar) Site in Iowa
Delate, K. M., (2003)
Economic Analysis of the Nashua Tillage Study: 1979-1987
Chase, Craig A., (1991)