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WAEC Agricultural Science 2024 Question 18

Question 18

Soil Fertility and Plant Nutrition

The diagram below illustrates the root system of a crop.
Which of the following fertilizers would not be required by a crop with the illustrated root system?

Diagram for this question
  1. A.Potassium sulphate
  2. B.Ammonium nitrate
  3. C.Rock phosphate
  4. D.Magnesium sulphate
Show the answer and explanation

Answer: B (Ammonium nitrate)

Explanation

Legumes fix their own nitrogen, so nitrogen fertilizer is not needed.