Grain farmers here have a corn-wheat-soybean rotation that they use. Corn planted in the spring, harvested in the fall, followed by wheat planted as soon as the corn is shelled, then after the wheat is cut in June, soybeans are planted. Three crops in two years. Even when grain prices are down, they still stick by that rotation. The only exception is on land that is too wet for wheat, then it's a corn-soybean rotation.