64. Gypsum is used for improvement of: A.Alkaline soils B.Saline soils C.Podsols D.Acidic soils
Answer: Option B Solution: Gypsum is calcium sulfate which is essential to the sustainability of most irrigated soils. Irrigated land eventually leads to sodicity and salinity unless extreme care is taken. It improves sodic (saline) soils by removing sodium from the soil and replacing it with calcium.
