Map Of gypsum deposits in northern Ohio, black squares suggest The placement of deposits, from "Geography of Ohio", 1923 Gypsum is used in a wide variety of programs: Soil Modification: Gypsum, also called land plaster, is used to be a soil conditioner to enhance its composition and fertility. It Positive https://www.propanraya.com/id/produk/eco-gypsum-ee-4050