What is the percentage of air in the soil?

Options

A. 50
B. 10
C. 45
D. 25

Answer

To determine the percentage of air in the soil, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Soil Composition**: Soil is made up of various components including minerals, water, organic matter, and air.

2. **Identify the Components and Their Percentages**:
- **Minerals**: Approximately 45% of soil is made up of minerals.
- **Water**: Soil contains about 20% to 30% water.
- **Organic Matter**: This constitutes about 5% of the soil.
- **Air**: The remaining percentage is made up of air.

3. **Calculate the Percentage of Air**:
- Since the total composition of soil must equal 100%, we can calculate the percentage of air by subtracting the percentages of the other components from 100%.
- If we assume the average values for water (let’s take 25% as a middle ground), we can calculate:
- Total = Minerals (45%) + Water (25%) + Organic Matter (5%) + Air (X)
- Therefore, 100% = 45% + 25% + 5% + X
- This simplifies to 100% = 75% + X
- Thus, X (percentage of air) = 100% - 75% = 25%.

4. **Conclusion**: The percentage of air in the soil is approximately 25%.

### Final Answer:
The percentage of air in the soil is **25%**.

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