The bronze colour of leaves is due to the deficiency of

Options

A. boron
B. calcium
C. nitrogen
D. sulphur

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the cause of the bronze color in leaves, specifically which nutrient deficiency leads to this coloration.

2. **Identifying the Options**: The options provided are:
- A) Boron
- B) Calcium
- C) Nitrogen
- D) Sulphur

3. **Analyzing the Nutrients**:
- **Boron**: Essential for cell wall formation and reproductive development but not typically associated with bronze coloration.
- **Calcium**: Important for cell wall structure (calcium pectate) and enzyme activation. Deficiency can lead to various symptoms, including leaf discoloration.
- **Nitrogen**: Crucial for chlorophyll production. Deficiency usually results in yellowing (chlorosis) rather than bronze.
- **Sulphur**: Important for protein synthesis and chlorophyll formation. Deficiency can lead to yellowing but not specifically bronze.

4. **Connecting Calcium Deficiency to Leaf Color**: Calcium deficiency can lead to structural issues in the leaf, causing a brownish or bronze appearance due to poor cell wall integrity and overall plant health.

5. **Conclusion**: Based on the analysis, the bronze color of leaves is primarily due to the deficiency of Calcium.

6. **Final Answer**: The correct option is **B) Calcium**.

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