Map Of gypsum deposits in northern Ohio, black squares show The situation of deposits, from "Geography of Ohio", 1923 Gypsum is used in lots of applications: Soil Modification: Gypsum, also referred to as land plaster, is used like a soil conditioner to further improve its composition and fertility. It Gains https://www.propanraya.com/id/produk/eco-gypsum-ee-4050