Gypsum Might make clay soil absorbent while ensuring it drains speedy more than enough to forestall drinking water buildup and root rot. The calcium it adds will likely maintain grassroots balanced. Map of gypsum deposits in northern Ohio, black squares suggest the location of deposits, from "Geography of Ohio", 1923 https://www.propanraya.com/id/produk/eco-gypsum-ee-4050