Map Of gypsum deposits in northern Ohio, black squares point out The situation of deposits, from "Geography of Ohio", 1923 Gypsum is used in a wide variety of applications: Soil Amendment: Gypsum, often called land plaster, is used being a soil conditioner to further improve its construction and fertility. It https://www.propanraya.com/id/produk/eco-gypsum-ee-4050