Select incorrect statement w.r.t. main functions of humus

Options

A. Prevents soil from compaction
B. Prevents the formation of soil crumbs
C. Improves aeration of soil
D. Improves water holding capacity of soil

Answer

To solve the question regarding the incorrect statement about the main functions of humus, we will analyze each provided option step by step.

### Step 1: Understand the Functions of Humus
Humus is an organic component of soil formed from the decomposition of plant and animal matter. It plays several crucial roles in maintaining soil health and fertility.

### Step 2: Analyze Each Statement
1. **Prevent soil from compaction**: This statement is true. Humus helps to maintain soil structure and prevents compaction, allowing for better root growth and water infiltration.

2. **Humus continuously supplies nutrients**: This statement is also true. Humus is rich in nutrients and contributes to the nutrient supply in the soil, which is essential for plant growth.

3. **Prevents the formation of soil crumbs**: This statement is incorrect. Humus actually promotes the formation of soil crumbs (aggregates), which improves soil structure and increases its ability to retain water.

4. **Improves aeration of the soil**: This statement is true. Humus enhances soil aeration by creating spaces in the soil structure, allowing for better gas exchange and root respiration.

5. **Improves water holding capacity of the soil**: This statement is true. Humus increases the soil's ability to retain moisture, which is vital for plant health.

### Step 3: Identify the Incorrect Statement
From the analysis, the statement that "prevents the formation of soil crumbs" is incorrect. Instead, humus aids in the formation of soil crumbs, enhancing soil structure and water retention.

### Conclusion
The incorrect statement regarding the main functions of humus is: **"Prevents the formation of soil crumbs."**

---