The appearance of yellow edges to leaves is due to deficiency of this mineral element

Options

A. calcium
B. magnesium
C. potassium
D. sulphur

Answer

To solve the question regarding the appearance of yellow edges to leaves due to mineral deficiency, we can analyze the options provided:

1. **Calcium**: Calcium deficiency typically leads to irregular leaf shapes and disorders, not specifically yellow edges. Therefore, calcium is not the correct answer.

2. **Magnesium**: Magnesium deficiency results in chlorosis, which means the leaves turn yellow due to the degradation of chlorophyll. However, this is not specifically associated with yellow edges, making magnesium also an incorrect choice.

3. **Potassium**: Potassium is known to be responsible for maintaining leaf color. A deficiency in potassium often leads to yellowing of the edges of older leaves, which can also appear wilted. This aligns with the description in the question, making potassium the correct answer.

4. **Sulfur**: Sulfur deficiency can also cause chlorosis, particularly in younger leaves, but it does not specifically lead to yellow edges in older leaves. Thus, sulfur is not the correct answer.

Based on this analysis, the correct answer to the question is **Potassium**.

### Summary of Steps:
1. Analyze the role of **Calcium** in leaf health.
2. Evaluate the effects of **Magnesium** deficiency.
3. Investigate the impact of **Potassium** on leaf color and edges.
4. Consider the role of **Sulfur** in plant nutrition.
5. Conclude that the appearance of yellow edges to leaves is due to a deficiency of **Potassium**.