: an area in which more land is used for the cultivation of corn than for any other single crop
This term is usually used specifically of the region of the U.S. historically including western Ohio, Indiana, Illinois, Iowa, southern Minnesota, the eastern parts of South Dakota, Nebraska, and Kansas, and northern Missouri. In this specific use it is usually capitalized.
Agriculturally, this region is close to the western fringe of the Corn Belt, that stretches from Illinois westward through Iowa and Minnesota.—Christopher Laingen, Focus On Geography, Winter 2008
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