RT Journal Article SR Electronic T1 Economics of conservation tillage systems for winter wheat production in Oklahoma JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 294 OP 297 VO 38 IS 3 A1 Epplin, Francis M. A1 Tice, Thomas F. A1 Handke, Steven J. A1 Peeper, Thomas F. A1 Krenzer, Eugene G. YR 1983 UL http://www.jswconline.org/content/38/3/294.abstract AB Alternative conservation tillage systems that rely on herbicides rather than mechanical tillage for weed control in annual winter wheat production in Oklahoma were investigated by an interdisciplinary team. The additional costs of the herbicides required for the experimental systems exceeded the value of the fuel and labor saved. However, most conservation tillage systems required less investment in machinery and some proved competitive with conventional systems on a total cost basis. Combination systems in which half the farm was conventionally tilled did not generate substantial savings in machinery investment.