The nation's commercial corn area has grown by 64 percent since it was originally set out. But analysis of actual data for corn acreage and production indicates that both are becoming more centralized in the Corn Belt.
"Is Corn Production Leaving the Corn Belt?,"
Iowa Farm Science: Vol. 13
, Article 5.
Available at: https://lib.dr.iastate.edu/farmscience/vol13/iss3/5