The value of ESP in alkali soils is always

A. Greater than 15

B. Less than 15

C. Any value

D. None of these

Answer: Option A

Solution(By Examveda Team)

The value of ESP in alkali soils is always greater than 15.
ESP is exchangeable sodium percentage, it measures the proportion of cation exchange sites occupied by sodium.
Soils are considered sodic when the ESP is greater than 6 and highly sodic when the ESP is greater than 15, thus alkali soils that are highly sodic with pH greater than 8.3 and ESP are always greater than 15.