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WAEC Agricultural Science 2013 Question 16

Question 16

Soil Erosion and Conservation

Which of the following practices leads to land degradation in the savanna zones of West Africa?
I. Constant annual bushfires
II. Overgrazing of grassland
III. Application of cattle manure.
IV. Cutting of woody species for fuel wood

  1. A.I, II and III only.
  2. B.I, II and IV only.
  3. C.II, III and IV only.
  4. D.I, II, III and IV.
Show the answer and explanation

Answer: B (I, II and IV only.)

Explanation

Burning, overgrazing and cutting trees leave the soil bare; manure improves the soil.