Calcium and magnesium can be deficient in

A. Acidic soils

B. Cold areas

C. Alkali soils

D. Both A and B

Answer: Option A

Solution(By Examveda Team)

Calcium and magnesium can be deficient in Acidic soils.
Soil acidity can restrict crop growth due to differences in nutrient availability, such as lower Ca and magnesium levels, and higher exchangeable aluminium levels.
This is because the high concentration of hydrogen ions displaced Ca and magnesium (Mg), which can then leach on sandy soils.