Question

Which of the following is not fertilizer?

• A. Compost
• B. Ammonium sulphate
• C. Superphosphate
• D. Sodium nitrate

Hint:

Manure = organic (low nutrients, improves soil health), Fertilizer = inorganic (high nutrient concentration).

Answer 1

The Correct Option is A

Step 1: Define fertilizer.
Fertilizers are inorganic/chemical substances that provide nutrients (N, P, K, etc.) in concentrated form to plants.
Step 2: Analyze options.
(A) Compost – it is an organic manure, not a chemical fertilizer.
(B) Ammonium sulphate – nitrogen fertilizer.
(C) Superphosphate – phosphorus fertilizer.
(D) Sodium nitrate – nitrogen fertilizer.
Step 3: Conclusion.
Thus, among the given options, Compost is not a fertilizer but an organic manure.