Yellowing and brown end of leaf is because of deficiency of:
Correct answer: C. Potassium
- A. Sodium
- B. Nitrogen
- C. Potassium
- D. Iron
Explanation
The correct answer is Potassium. Potassium is crucial for numerous plant processes, including water regulation and enzyme activation. A potassium deficiency often results in yellowing and browning of leaf margins and tips, a symptom not typically associated with other nutrient deficiencies. While nitrogen deficiency does cause yellowing, it affects older leaves more uniformly rather than just the edges. Sodium is not an essential nutrient for most plants, and iron deficiency results in yellowing between the veins but not browning at the leaf edges.
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About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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