The process of mineralisation by microorganisms helps in the relase of

Options

A. inorganic nutrients from humus
B. both organic and inorganic nutrients from detritus
C. organic nutrients from humus
D. inorganic nutrients from detritus and formation of humus.

Explanation

### Step-by-Step Solution:

1. **Understanding Mineralization**:
- Mineralization is a biological process where microorganisms break down organic matter, leading to the release of inorganic substances.

2. **Release of Inorganic Substances**:
- During mineralization, organic substances (like dead plants and animals) are decomposed by microorganisms, resulting in the formation of inorganic substances.

3. **Types of Inorganic Substances Released**:
- The inorganic substances released can be categorized into two types:
- **Minerals**: These include essential nutrients such as calcium, magnesium, and potassium.
- **Non-minerals**: These include gases and compounds like carbon dioxide and water.

4. **Role of Humus**:
- The released nutrients mix with humus, which is the organic component of soil formed from the decomposition of plant and animal matter. Humus is crucial for soil fertility.

5. **Decomposition Process**:
- The breakdown of humus is a slow process, but it is essential for the gradual release of inorganic substances into the soil.

6. **Conclusion**:
- Thus, the process of mineralization by microorganisms helps in the release of both minerals and non-minerals, which are vital for maintaining soil fertility and supporting plant growth.