"55 Eastern Corn Belt Plains" . "Corn Belt" . "Corn Belt#Corn Belt" . . "Central Corn Belt Plains" . . . . . "Till Plains" . . "Eastern Corn Belt Plains (ecoregion)" . . "the Corn Belt" . . "54 Central Corn Belt Plains" . . . . . "Eastern Corn Belt Plains" . "wheat belt" . . . . "47 Western Corn Belt Plains" . "corn growing states" . "Western Corn Belt Plains" . . . . . . . . . . . . . . . . . . "Corn Belt" . . .