Sometimes Joe Kriegel cringes when he drives past farms in his county and sees erodible hilltops that have been worked.
There was a time, decades ago, when Kriegel moldboard plowed soybean stubble in the fall for his dad, but that’s no longer the case today on his 2,000-acre farm near Brooklyn, Iowa.
Kriegel and his sons have built a 3-year rotation of narrow-row corn, soybeans and cover crops that has reduced erosion and mellowed once…