Northern Research and Demonstration Farm
Crop yield usually is affected by the crop sequence used. Crop growth characteristics, type of harvested product, and management practices influence physical and chemical properties of soil, availability of water, and incidence of diseases, weeds, and pests. Increased soil nitrogen (N) availability, when legumes are included in the rotation, and reduced incidence of diseases and pests are two of the most important benefits of crop rotations.
Iowa State University
Mallarino, Antonio P. and Rueber, David, "Impacts of Crop Rotation and Nitrogen Fertilization on Crop Production" (2002). Iowa State Research Farm Progress Reports. 1647.