Soybean research at Purdue University is showing sulfur is a key nutrient to higher soybean yields.

Purdue Extension agronomist Shaun Casteel…

“Most people would say I don’t need it for soybeans,” he says, “but sulfur is actually a cofactor for nodulation, and so if we don’t have nodulation, we don’t have good nitrogen supply. We don’t have good yields.”

Unfortunately, Casteel says naturally occurring sulfur is declining…

“We have the Clean Air Act in 1990.”  He says, “You know, we started to realize that instead of getting 15 to 20 pounds of sulfur being deposited from the atmosphere, we’re at less than 5 lbs.

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