Question 21
Photosynthesis and Plant NutritionYellowing of leaves is a symptom associated with deficiency of
- A.iron, calcium and magnesium
- B.nitrongen, sulphur and potassium
- C.sulphur, phosphorus and iron
- D.magnesium, nitrogen and iron.
Show the answer and explanation
Answer: D (magnesium, nitrogen and iron.)
Explanation
Magnesium and nitrogen are part of chlorophyll and iron is needed to make it, so lack of any of them causes yellow leaves (chlorosis).