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Q117
(NDA-II/2024)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Official Key
Which one among the following fertilizers is a source of nitrogen ?
Result
Your answer:
—
·
Correct:
D
Explanation
Urea (chemical formula: NH2CONH2) is the correct answer as it is a highly concentrated nitrogenous fertilizer, containing approximately 46% nitrogen. It is the most widely used solid nitrogen fertilizer globally due to its high nutrient content and ease of application.
- Superphosphate: This is a phosphatic fertilizer. Single Superphosphate (SSP) primarily provides phosphorus (P), calcium, and sulfur.
- Potassium sulfate: Also known as sulfate of potash (SOP), it is a source of potassium (K) and sulfur, but does not contain nitrogen.
- Bone meal: An organic fertilizer made from crushed animal bones, it is a rich source of phosphorus and calcium, with only negligible amounts of nitrogen.
Nitrogen is a vital macronutrient for plants, essential for the synthesis of chlorophyll and proteins. Urea provides this nitrogen, which is converted into ammonium and nitrate in the soil for plant uptake.
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