Gypsum is a product that contains 21% calcium and 17.5% sulfur, and has many benefits your soil. Gypsum interacts with water to reduce crusting. It loosens clay and compacted soil, improving the structure, aggregation and permeability which will allows for easier penetration of surface applied fertilizers. Gypsum increases soil calcium levels without affecting its pH. If your soil is high in sodium (or any other cation such as magnesium), it binds to the sulfur molecule in the gypsum. Since sulfur is mobile in the soil, it moves away from the root zone resulting in plant available calcium. This product also helps make phosphorous more plant available by attaching to the aluminum in the soil which frees up the phosphorous resulting in increased yields.

From Amanda Homans, Agronomist with McRae Holdings