Which chemical compound is used to reduce the acidity of the soil ?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Soil Acidity**: Soil acidity can negatively affect plant growth and crop yield. It is important to manage the pH levels of the soil to create a suitable environment for plants.

2. **Identifying Basic Compounds**: To reduce soil acidity, we need to add basic (alkaline) compounds. These compounds will neutralize the acids present in the soil.

3. **Common Chemical Compounds**:
- **Gypsum**: This is a mild basic compound with the chemical formula CaSO₄ · 2H₂O. It helps to improve soil structure and reduce acidity.
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