Which of the following fertilisers are covered under the Government of India’s Nutrient Based Subsidy scheme? 1. Diammonium Phosphate DAP) 2. Monoammonium Phosphate MAP) 3. Triple Super Phosphate TSP) 4. Single Super Phosphate SSP) fertilizersSelect the correct answer using the codes given below.

🔑 Key Points
The Department of Fertilizers, Ministry of Chemicals and Fertilizers deals with the implementation of the Nutrient Based Subsidy Scheme (NBS), implemented w.e.f. 1 April 2010.

Under the NBS Policy, a fixed rate of subsidy (in Rs. per Kg basis) is announced on nutrients namely Nitrogen (N), Phosphate (P), Potash (K), and Sulphur (S) by the Government on an annual basis.
The per Kg subsidy rates on the nutrient N, P, K, and S are converted into per tonne subsidy on the various P&K fertilizers covered under the NBS Policy.
Any variant of fertilizers covered under the subsidy scheme with micronutrients like Boron and Zinc is eligible for a separate per tonne subsidy to encourage their application along with primary nutrients.
At present, 22 grades of P&K fertilizers namely:
Diammonium Phosphate (DAP), Monoammonium Phosphate (MAP), Triple Super Phosphate (TSP), Single Super Phosphate (SSP), Ammonium Sulphate, and 16 grades of NPKS complex fertilizers are covered under the NBS Policy. Hence option 4 is the correct answer.
Under the NBS regime, the MRP of P&K fertilizers has been left open, and fertilizer manufacturers/marketers are allowed to fix the MRP at reasonable rates.
DAP and MAP also contain Nitrogen (N), another essential plant nutrient.
Millions of tons of these phosphate fertilizer products are used worldwide to grow the quantity of food needed to support an increasing global population.