Gypsum Will help handle aluminum toxicity which often goes together with soil acidity in subsoils. With this, it makes it possible for deeper rooting of crops that proves to be valuable to the crops.  Gypsum happens in comprehensive beds linked to other evaporite minerals (e.g., anhydrite and halite), especially in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050