Grain quality problems are surfacing in Iowa’s corn and soybean crops after the wettest harvest weather on record in some places, according to farmers and agronomists from across the state. Molds are growing on corn ears, and soybean pods are at risk of splitting open due to repeated soak-dry cycles, said Charlie Hurburgh, ISU Extension grain quality specialist.

“The 2018 crop is now at a point where the wet conditions are affecting quality,”...