Economic returns from alternative corn and soybean tillage systems in Indiana. Purdue University, West Lafayette, Indiana. Lines, Allan D., Randall Reeder and Darrel Acker, 1990. Economic Comparison of Tillage Systems. Ohio Cooperative Extension Service, The Ohio State University, Columbus, Ohio 43210.
Crop residue helps control erosion and conserve water in ridge-tilled fields.
Even on well-drained plots, planting on plowed ground was 45 days later than on ridge till in 1989. Keith L. Smith, Associate Vice President for Ag. Adm. and Director, OSU Extension.