Inorganic nutrients are released from humus by the microbial action during

Options

A. Fragmentatin
B. Leaching
C. Catabolism
D. Minearlisation

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks about the process through which inorganic nutrients are released from humus due to microbial action. Humus is the organic component of soil formed by the decomposition of leaves and other plant material by soil microorganisms.

2. **Analyzing the Options**:
- **Fragmentation**: This refers to the physical breakdown of organic matter into smaller pieces. While it is a part of decomposition, it does not specifically refer to the release of inorganic nutrients.
- **Leaching**: This is the process where soluble substances are washed out from the soil. It does not directly relate to the microbial action that releases nutrients from humus.
- **Catabolism**: This term refers to the breakdown of complex molecules into simpler ones, which can involve microbial activity. However, it does not specifically indicate the release of inorganic nutrients from humus.
- **Mineralization**: This is the process where microorganisms convert organic matter into inorganic nutrients. During mineralization, microbes break down organic compounds in humus, releasing essential inorganic nutrients like nitrogen, phosphorus, and potassium into the soil.

3. **Selecting the Correct Option**: Based on the analysis, the correct answer is **mineralization**, as it specifically describes the process by which inorganic nutrients are released from humus through microbial action.

4. **Final Answer**: Inorganic nutrients are released from humus by microbial action during **mineralization**.

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