Ohio State and University of Michigan researchers have studied alternative hay curing methods including drying agents and hay preservatives both of which speed the process and maintain quality. Drying agents are compounds used in the field on cut hay. They are applied by a sprayer attached to the mower. Forage plants have a waxy covering that keeps moisture locked in the plant. As the hay lays in the field, the drying agent attacks that cover, allowing water to exit faster.
Preservatives reduce drying time by letting moist hay be baled without spoilage.
Proprionic acid-based compounds are most popular. They prevent mold and bacterial growth, and reduce spoilage when moisture is between 20 and 30 percent. Visit the annual OSU Hay Day at Caldwell, Ohio, June 21.