Amount of free phosphoric acid in SSP in

A. 1%

B. 2.50%

C. 4%

D. 4.50%

Answer: Option C

Solution(By Examveda Team)

SSP is the most popular phosphatic fertilizer after Dap as it contains 3 major plant nutrients i.e. Phosphorus, Sulphur and Calcium along with traces of other micronutrients.
Free phosphoric acid in both the SSP whether it is powdered or granulated is 4% maximum. Phosphoric acid yields more available phosphorus hence it can be directly used as a fertilizer.