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WAEC Biology 2004 Question 35

Question 35

Soil

Conservation of soil fertility employs crop rotation because

  1. A.crops are allowed to grow at their own rates
  2. B.it encourages the healthy growth of plants
  3. C.it allows utilization of soil nutrients at different levels
  4. D.different crops grow at the same time.
Show the answer and explanation

Answer: C (it allows utilization of soil nutrients at different levels)

Explanation

Different crops have roots at different depths and need different nutrients, so rotating them uses soil nutrients at different levels and does not exhaust one layer.