Denitrification occurs seriosly in:

Options

A. Aerated soil with very low organic matter content
B. Aeratted soil with moderate amount of `N_(2)^(-)` and organic matter.
C. Water logged anaerobic soil with a high organic matter.
D. Water logged anaerobic soil with a low organic matter

Answer

**Step-by-Step Solution:**

1. **Understanding Denitrification:**
- Denitrification is the process where nitrate (NO3-) is reduced to molecular nitrogen (N2) through a series of intermediate gaseous compounds. This process is crucial for the nitrogen cycle as it helps in returning nitrogen to the atmosphere.

2. **Identifying Conditions for Denitrification:**
- Denitrification primarily occurs in anaerobic conditions, meaning it takes place in environments with low or no oxygen. This is because denitrifying bacteria, which facilitate this process, thrive in such conditions.

3. **Analyzing the Options:**
- **Option A:** Aerated soil with very low organic matter content.
- In this scenario, the presence of oxygen (aerated soil) inhibits denitrification. Therefore, this option is not suitable.

- **Option B:** Aerated soil with a moderate amount of nitrogen in organic matter.
- Similar to Option A, the presence of oxygen in aerated soil prevents denitrification from occurring. Thus, this option is also unsuitable.

- **Option C:** Waterlogged anaerobic soil with high organic matter.
- This option describes an anaerobic environment (waterlogged) that is rich in organic matter. High organic matter supports the survival of denitrifying bacteria, making this the most suitable condition for denitrification.

- **Option D:** Waterlogged anaerobic soil with low organic matter.
- While this option is anaerobic, the low organic matter content would not support the necessary bacteria for denitrification, making it an unsuitable choice.

4. **Conclusion:**
- After analyzing all options, the correct answer is **Option C: Waterlogged anaerobic soil with high organic matter**. This environment provides the necessary conditions for denitrification to occur effectively.

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