Agricultural Uses of Phosphogypsum, Gypsum, and Ca …
Gypsum provides both Ca and S for crop nutrition and has long been used as a Ca source for peanuts (Arachis hypogaea L.). Peanuts have a unique Ca requirement during pod development (Alva et al. 1989), depending on peanut type (Gaines et al. 1991), soil Ca status (Alva et al. 1991), and type and form of applied gypsum (Alva et al. 1989).