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WAEC Agricultural Science 2025 Question 17

Question 17

Soil Fertility and Plant Nutrition

A farmer observed purple colouration on cowpea leaves in the field. This deficiency symptom could be corrected by applying

  1. A.calcium carbonate.
  2. B.ammonium sulphate.
  3. C.single superphosphate.
  4. D.muriate of potash.
Show the answer and explanation

Answer: C (single superphosphate.)

Explanation

Purple leaves show phosphorus deficiency; superphosphate supplies phosphorus.