Question

Most of the denitrification occurs in

• A. Well-drained soil
• B. Fallow soils
• C. Submerged soil
• D. Pastured land soil

Hint:

Denitrification:
- Occurs under anaerobic conditions.
- Common in waterlogged/submerged soils.
- Converts nitrate to nitrogen gas (N$_2$).

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of denitrification and its occurrence in soils.

Step 2: Detailed Explanation:
Most of the denitrification occurs in submerged soil (C).
Denitrification is the microbial conversion of nitrate (NO$_3^-$) to nitrogen gases (N$_2$, N$_2$O) under anaerobic conditions.
Submerged soils (e.g., paddy fields) are anaerobic, creating favorable conditions for denitrification.
Other options:
- Well-drained soil (A): Aerobic, denitrification is limited.
- Fallow soils (B): Not typically anaerobic.
- Pastured land soil (D): Aerobic.
Thus, denitrification occurs primarily in submerged soils.

Step 3: Final Answer:
Thus, most denitrification occurs in submerged soil, which corresponds to option (C).
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