Map Of gypsum deposits in northern Ohio, black squares suggest The situation of deposits, from "Geography of Ohio", 1923 Gypsum is used in lots of programs: Why Gypsum Might Not Be the Best Option Above-application of gypsum can strip critical nutrients out of your soil, which can harm plant expansion. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050