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WAEC Biology 2019 Question 33

Question 33

Soil

Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?

  1. A.Application of N-P-K fertilizer
  2. B.Shifting cultivation
  3. C.Mixed farming
  4. D.Crop rotation
Show the answer and explanation

Answer: A (Application of N-P-K fertilizer)

Explanation

Too much fertilizer washes into rivers and lakes and causes eutrophication, killing fish. It can also make soil acidic and harm soil organisms.