By Dan Crummett
Progressive Farmer Contributing Editor
Kevin Kalb has been on the leadership board of the National Corn Growers Association (NCGA) National Corn Yield Contest since he first entered the competition in 2007. High yields, he has found, have their roots in the autumn before planting.
Farming near Dubois, Indiana, Kalb won the AA Non-Irrigated category in 2013 with a 374-bushel-per-acre entry and finished second in 2014 with 361 bushels. Class AA states include Illinois, Indiana, Iowa, Minnesota, Ohio and Wisconsin.
Fertility is a big part of Kalb's corn-growing success, and the ...