By Dan Crummett
Progressive Farmer Contributing Editor
Steve Berger and his dad, Dennis, have been no-till farming since the 1970s in southeast Iowa near Wellman. For the past 15 years, they've been planting cereal rye cover crops behind every inch of their 2,000-acre, 50/50 corn-and-soybean farm.
Still, contrary to much conventional coffee-shop wisdom, which favors clean-tilled conventional management for high yields, the Bergers' corn fields average about 225 bushels per acre, and they bin about 20% more harvest than their county average each year. In 2014, they saw their first 300-plus bushel-per-acre corn yields on their farm.
Steve is quick ...