A few healthy gram seeds are placed in each of the three pots X, Y and Z containing same type of soil. The soil in pot X is mixed with some green leaves. The soil in pot Y is mixed with old cow dung while soil of pot Z is mixed with urea. Pots are watered regularly and given proper environment for plant-growth. Which of the following will be observed after 10 days?

Options

A. Lot of growth in Z with replenishment of all the nutrients.
B. Lot of growth in X without replenishment of any nutrient
C. Lot of growth in Y with replenishment of the nutrients.
D. Both (A) and (C)

Explanation

To analyze the growth of gram seeds in the three pots with different soil amendments, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Variables**:
- Pot X: Soil mixed with green leaves (organic matter).
- Pot Y: Soil mixed with old cow dung (organic fertilizer).
- Pot Z: Soil mixed with urea (chemical fertilizer).

2. **Understand the Role of Each Amendment**:
- **Green Leaves (Pot X)**: This will decompose and provide nutrients over time, but the process may take longer.
- **Old Cow Dung (Pot Y)**: This is a well-known organic fertilizer that will provide nutrients to the plants and improve soil structure.
- **Urea (Pot Z)**: This is a fast-acting chemical fertilizer that provides nitrogen, which is essential for plant growth.

3. **Consider the Growth Environment**:
- All pots are given the same watering and environmental conditions, which means the only difference in growth will come from the soil amendments.

4. **Predict Growth After 10 Days**:
- **Pot X**: The plants may show some growth due to the nutrients from decomposing green leaves, but it may be slower compared to the others.
- **Pot Y**: The plants are likely to be healthy and show good growth due to the nutrients from the old cow dung.
- **Pot Z**: The plants will likely show rapid growth due to the immediate availability of nitrogen from urea.

5. **Conclusion**:
- After 10 days, it is expected that the plants in Pot Z (with urea) will show the most vigorous growth, followed by Pot Y (with old cow dung), and Pot X (with green leaves) will show the least growth.

### Summary of Observations:
- Pot X (green leaves): Moderate growth.
- Pot Y (old cow dung): Good growth.
- Pot Z (urea): Best growth.