Iowa leads the states in the production of corn and ranks among the leaders in production of soybeans. Other major field crops include oats and hay, red clover, flaxseed, rye and wheat. The primary fruits produced in Iowa are apples.
Crop rotation also helps to battle against the forces of erosion. Rotating crops helps to improve soil stability by alternating between crops with deep roots and those with shallow roots. Pests are also deterred by eliminating their food source on a regular basis.