The highly degraded organic matter rich in nitrogen and potassium in particular, resulting from the activity of earthworms is called

Options

A. humus
B. vermicompost
C. worm castings
D. compost bedding

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Earthworms:**
- Earthworms are often referred to as the "friends of farmers" because they play a crucial role in soil health. They help in aerating the soil and enhancing its nutrient content, particularly nitrogen and potassium.

2. **Identifying the Organic Matter Formed:**
- The question asks about the highly degraded organic matter that is rich in nitrogen and potassium due to the activity of earthworms. This organic matter is essential for soil fertility.

3. **Evaluating the Options:**
- **Option A: Humus**
- Humus is an organic compound formed from the decomposition of dead and decaying material. While it is rich in nutrients, it is not specifically the product of earthworm activity.
- **Option B: Vermicompost**
- Vermicompost is the product of the breakdown of organic matter by earthworms. This process results in nutrient-rich compost that is particularly high in nitrogen and potassium, making this option a strong candidate.
- **Option C: Worm Castings**
- Worm castings are the excreta of earthworms, which are nutrient-rich but do not specifically refer to the process of decomposition that results in the formation of organic matter.
- **Option D: Compost Bedding**
- Compost bedding relies on microorganisms for the breakdown of organic material and does not specifically relate to earthworm activity.

4. **Conclusion:**
- After evaluating all the options, the correct answer is **Vermicompost**, as it directly results from the activity of earthworms and is rich in nitrogen and potassium.

**Final Answer: Vermicompost**

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