Dick said gypsum has multiple benefits, including the ability to reduce phosphorus runoff from high phosphorus soils. More details are available in an OSU Extension bulletin (Bulletin 945), “Gypsum as an Agricultural Amendment,” available for $7.50 here.
Dick recommends that growers research those benefits to decide if applying gypsum is the right choice for them.
“Applying gypsum in the fall can be worth it, but it is not a silver bullet,” he said. “It is a tool in the farmer’s toolkit that, if used properly on the right soils and with the right crops, can provide both economic and environmental benefits.
“The benefits depend on the soil and the crop, so growers should evaluate their soils and crop management options and goals.”