Which one among the following components of vermicompost contains plant growth factors

Options

A. Microbes
B. Humic acid
C. Nitrogen
D. Phosphorus

Answer

**Step-by-Step Solution:**

1. **Understanding Vermicompost**: Vermicompost is a type of organic fertilizer produced by the decomposition of organic matter through the activity of earthworms. It is rich in nutrients and beneficial microorganisms.

2. **Components of Vermicompost**: The main components of vermicompost include nitrogen (N), phosphorus (P), potassium (K), and other organic materials. These components contribute to its effectiveness as a fertilizer.

3. **Identifying Plant Growth Factors**: Among the various components present in vermicompost, certain substances are known to promote plant growth. These are referred to as plant growth factors.

4. **Key Component - Humic Acid**: The primary component of vermicompost that contains plant growth factors is humic acid. Humic acid is a complex mixture of organic compounds that enhances soil fertility and promotes plant growth.

5. **Conclusion**: Therefore, the component of vermicompost that contains plant growth factors is **humic acid**.

**Final Answer**: Humic acid.

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