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WAEC Biology 1995 Question 46

Question 46

Soil

Prevention of erosion could best be carried out by

  1. A.crop rotation and mulching
  2. B.contouring of slopping ground and afforestation
  3. C.grazing terracing and shifting cultivation
  4. D.strip cropping and poaching
  5. E.bush fallowing and crop rotation
Show the answer and explanation

Answer: B (contouring of slopping ground and afforestation)

Explanation

Contours slow water running downhill and trees hold the soil with their roots.