Gypsum pelletized 50#

(Calcium Sulfate CaSO4•2H2O, 21% Ca, 16% S) Gypsum is a good source of calcium when the pH is already at a desired level. The sulfur in gypsum reacts with water to form a weak sulfuric acid solution that frees the calcium in the soil. Prilled with 2% sodium salt lignin, an NOP-allowed synthetic, as a binding agent.