40-Lb. Pelleted GypsumGypsum is one of those rare materials that perform in all three categories of soil treatment: an amendment, conditioner and fertilizer. It is a fast release source of sulfur and calcium. When dissolved it releases an equal proportion of calcium and sulfate. Gypsum is 100% more soluble than lime! It increases calcium without effecting pH. Low in dust and easy to apply either by hand or lawn spreader, pelleted gypsum is the right choice because it