WAEC Biology 2019 Objective — Question 33
Question 33 of 50 from the West African Examinations Council (WAEC) Biology 2019 Objective paper, with the correct answer and a full explanation.
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Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?
- A. application of N.P.K fertilizerCorrect
- B. shifting cultivation
- C. mixed farming
- D. crop rotation
Explanation
Excessive use of fertilizer may cause unwanted algal growth.
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