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What is Gypsum?

Dr. Amy Collick is an Assistant Research Professor at University of Maryland Eastern Shore. She tells us about gypsum and shows us the powdery substance that makes up the gypsum curtains used at the research site. The calcium in gypsum binds to the phosphorous (P) in the soil. The resulting calcium phosphate is less likely to dissolve in water. This reduces the risk of P runoff. USDA is an equal opportunity provider, employer, and lender.