48. Calcium salts used as fertilizer is : A.Calcium Carbide B.Calcium Carbonate C.Calcium Cyanide D.Calcium Sulphate
Answer: Option D Solution: Sulphur (as sulphate) is a major plant nutrient, and is essential for crop growth. Calcium Sulphate (gypsum) is used to improve soil quality. Calcium sulphate acts as a pH buffer, which can contribute to neutralizing both soil alkalinity and acidity. It is mainly used for the reclamation of sodic soils through ion exchange (calcium replacing sodium).
