Calcium salts used as fertilizer is :
A
Calcium Carbide
B
Calcium Carbonate<br>
C
Calcium Cyanide
D
Calcium Sulphate
Correct Answer: Calcium Sulphate
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).