Gypsum Will help treat aluminum toxicity which often goes along with soil acidity in subsoils. With this particular, it will allow deeper rooting of vegetation that proves to get advantageous for the crops.  Gypsum is considered non-toxic, but prolonged exposure to dust can result in respiratory concerns like bronchial asthma. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050