Effects of Crop Rotation and Irrigation on Soybean and Wheat Doublecropping onClay Soil: An Economic Analysis

摘要

Field experiments were conducted from 1984 to 1991 to determine and compare theyields and economic returns of soybean monocrops, continuous wheat soybean doublecrops, and 2-year rotations of corn/wheat-soybean and sorghum/wheat-soybean in irrigated and nonirrigated environments on Tunica clay. Yields, production records, and commodity prices were used to calculate annual net returns above specified costs for each cropping system. In the irrigated study, the highest overall net returns per acre were produced by the corn/wheat-soybean ($136.29) and the wheat-soybean doublecrop ($123.47) systems, whereas the lowest overall net returns per acre were from soybean monocrops ($52.85).