Much of the Midwest is not just corn, it is also beans which do have protein. Also look at the nutrients in the soil, that end up on the things that are grown. Look at where a lot our bigger deer are killed. It's in the black belt region of the state. Have you ever seen how black and rich the soil in the Midwest is? Where I was just at in Kansas, the dirt looked like ground up coal it was so black. Also as you go north and west you see less and less pines and more and more hardwoods.
