WAEC Agricultural Science 2025 Objective — Question 17
Question 17 of 50 from the West African Examinations Council (WAEC) Agricultural Science 2025 Objective paper, with the correct answer and a full explanation.
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A farmer observed purple colouration on cowpea leaves in the field. This deficiency symptom could be corrected by applying
- A. calcium carbonate
- B. ammonium sulphate
- C. single superphosphateCorrect
- D. muriate of potash
Explanation
A purple tinge on cowpea leaves is an indication of phosphorous deficiency. Single superphosphate is a fertilizer rich in phosphorous, and applying it can quickly correct the imbalance.
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