The anion exchange capacity (AEC) increase as soil pH

A. Remain unaffected

B. Decreases

C. First increases then decreases

D. First decreases then increases

Answer: Option B

Solution(By Examveda Team)

Anion exchange capacity (AEC) represents the positive charge available to attract anions in solutions. Soils that have an anion exchange capacity typically contain weathered kaolin minerals, iron and aluminum oxides and amorphous materials.
It is dependent upon the pH of the soil and the anion exchange capacity (AEC) increases as soil pH Decreases.