Published online by Cambridge University Press: 10 May 2017
Farmers in the Northeast have traditionally rotated crops in a particular field. This system has several advantages. Rotation of crops reduces the buildup of weeds, insects, and diseases specific to one crop. Legumes such as alfalfa fix nitrogen for use by the following grain crops. Including close growing crops in the rotation reduces soil loss. Growing several crops distributes labor requirements and reduces risk.
Journal Paper No. 5696 in the Pennsylvania Agricultural Experiment Station.