Just a few facts, please don't construe this as arguing with anybody.
Wheat, corn, soybeans, ANY crop that's grown is typically grown because it's an ideal match with the land and climate. Land/climate that's good for wheat, for instance, is rarely good for corn. Wheat growth occurs mainly in the spring and is harvested in summer.
Corn wants long, hot, humid summers, and is harvested in the fall.
You really can't effectively substitute one crop type for another. Corn and soybeans are one exception. But wheat & corn, or wheat and rice, or even rice and corn are not substitutable for each other. Not optimally.