ECONOMIC AND ENERGY EFFICIENCY COMPARISONS OF SOYBEAN TILLAGE SYSTEMS Lehi German, formerly was graduate research assistant, University of Missouri, now is energy analyst for Farmland Industries, K. Schneeberger is associate professor, Herman Workman is professor, and J. McKinsey, Jr. is research assistant, Dept. of Agricultural Economics, University of Missouri. Research paper 7581 of the Agric. Exp. Sta., Univ. of Missouri

Three tillage systems for soybeans in the Western Corn Belt were compared: conventional, reduced-till, and no-till. Production budgets are presented for various assumptions on the relative yields under these three systems. Energy output-input ratios were favorable for the reduced-till and no-till systems. For a model corn-soybeans-hog farm, these two systems were also more profitable than conventional tillage at 1976 crop and input prices.