Gypsum Could make clay soil absorbent while guaranteeing it drains fast ample to forestall drinking water buildup and root rot. The calcium it provides will likely preserve grassroots nutritious. Map of gypsum deposits in northern Ohio, black squares point out the location of deposits, from "Geography of Ohio", 1923 Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050