Support prices for corn are high and certain. Many Iowa farmers could profitably push their corn yields up to 100 to 125 bushels per acre in favorable seasons. Here's what heavy fertilizer applications can do.
Dumenil, Lloyd; Nicholson, R. P.; and Meldrum, H. R.
"How Much Fertilizer for Corn?,"
Iowa Farm Science: Vol. 7
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol7/iss9/2