Map Of gypsum deposits in northern Ohio, black squares point out the location of deposits, from "Geography of Ohio", 1923 Gypsum is used in lots of purposes: Soil Amendment: Gypsum, also called land plaster, is made use of for a soil conditioner to boost its structure and fertility. It Advantages https://www.propanraya.com/id/produk/eco-gypsum-ee-4050