Salt index is given by

A. Puri

B. Sorenson

C. Roy

D. Senapati

Answer: Option A

Solution(By Examveda Team)

The salt index is a numeric ratio of the increase in osmotic pressure produced by a selected fertilizer product compared to that produced by the same weight of sodium nitrate, where sodium nitrate is assigned a relative value of 100.
The salt index is given by Puri.