Agronomy is defined as the science of soil management and the production of field crops. This principle is evident in Dr. Fred Below and Dr. Laura Gentry's presentation of the Seven Wonders of Corn Yield. They ranked seven factors in terms of their potential influence on corn yield, with the assumption that the fundamentals of drainage, fertility and weed control are managed appropriately. When considering corn-on-corn rotations, it is important to weigh the benefits and the risks, both economically and agronomically.