Question 8
Soil Fertility and Plant NutritionWhen leaves of crop plants show brownish colouration from the tips of the mid-ribs backward they are showing deficiency symptom of
- A.magnesium
- B.zinc
- C.nitrogen
- D.copper
- E.phosphorus.
Show the answer and explanation
Answer: C (nitrogen)
Explanation
Nitrogen deficiency shows first on older leaves as yellowing and then browning that starts at the tip and moves back along the midrib (a V shape in maize). Phosphorus deficiency gives dark green or purplish leaves instead.