Wheat
No. US farmers produce approximately five times as much corn than wheat annually, on roughly double the acreage.
No region produces more corn than the US, since it is by far the world's largest producer. Not sure about wheat.
Corn (maize), soybeans, wheat, hay, and sorghum.
Wheat, corn, and soybean, (technically corn and soybeans are not grains so rice and oats would be next).
No. Wheat farming is and can be located where corn is being farmed, just in different fields from that of the corn field.
Corn, wheat and soybeans.
Corn - Iowa Wheat - Kansas Cotton - Texas Potatoes - Idaho
People, food, corn, wheat, oranges, almost anything
Yes. In most years, US farmers grow enough wheat and corn to export around 30% of both crops to other countries.
potatoes and corn and wheat and milk
Rice is more paler and thinner, the seeds looking more oval (or oblong) in shape than corn. Corn kernels tend to be more yellow, and more squatter, with a parallelogram-look to them, if the kernel is flipped upside down, with the bottom part more curved and smoother. The plants themselves are different: corn is much taller, with wider leaves, and the cobs are located right on the side of the stems. Rice, on the other hand, has much narrower leaves, and the seeds are grown from the top of the plant, and have a pattern to them called a Raceme, where the seed head is kind of lacy, not cramped altogether like corn is.