“Many farmers don’t fertilize for sulfur and zinc. And many people don’t realize the season-long importance of phosphorus,” says Fred Below, a University of Illinois plant physiologist. In research conducted by Below and graduate student Ross Bender, extra P, S and Zn increased corn yields 8 to 10 bushels per acre in fields already supplied with a balanced high-yield fertility program.
“We have seen yield increases greater than would be expected based on the P soil test,” says Below. “Phosphorus’ uptake rate is greater than what many soils can supply based on the soil test.
“I’m also convinced that at yields above 200 bushels per acre, there are many cases where yields are being limited by sulfur and zinc,” adds Below.
Read more about adding extra phosphorus, sulfur and zinc to your corn for a yield boost.
Graph credit: University of Illinois