The Fourth Building Block:Sulfur is easily forgotten but essential to high yield

摘要

Nitrogen, phosphorus and potassium get all of the publicity, but if there was an Academy Award for crop nutrients, sulfur would win best supporting actor."A bushel of corn removes 0.08 lb. of sulfur in the grain and 0.09 lb. in the stalk—0.17 lb. total," explains Farm Journal Field Agronomist Ken Ferrie. "So 200-bu. corn takes up 34 lb. of sulfur per acre." That figure is even more impressive if you think of it in terms of sulfate, which is the form of sulfur that plants actually can use—102 lb. of sulfate per acre.