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WAEC Agricultural Science 1999 Question 16

Question 16

Farming Systems

The effects of practising crop rotation include the following except

  1. A.maintaining and improving soil fertility
  2. B.controlling soil erosion
  3. C.preventing the build-up of pests and diseases
  4. D.adding humus to the soil.
Show the answer and explanation

Answer: D (adding humus to the soil.)

Explanation

Rotation itself does not add humus; manuring does.