Name any two macronutrients and state their importance in plant nutrition

Explanation

### Step-by-Step Solution

1. **Identify Two Macronutrients**:
- The two macronutrients we will discuss are **Nitrogen** and **Phosphorus**.

2. **Importance of Nitrogen**:
- **Absorption**: Nitrogen is absorbed by plants primarily in the form of **nitrate ions (NO3-), nitrite ions (NO2-), or ammonium ions (NH4+)**.
- **Requirement**: It is required by plants in the **greatest amount** compared to other nutrients.
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