Calmer Corn Heads was founded by Marion Calmer, a farmer, inventor and researcher from western Illinois who has pioneered the planting of narrow row corn. He invented the world’s first single-chain, narrow row corn head for 12- and 15-inch rows, built the world’s largest corn heads and is founder of Calmer’s Ag Research Center – the largest privately funded, farmer-run ag research center in the U.S. More