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WAEC Agricultural Science 2011 Question 17

Question 17

Irrigation and Drainage

The following are advantages of sub-surface irrigation except that

  1. A.it is suitable for soils with low water holding capacity.
  2. B.it can be used only for specific types of crops.
  3. C.the rate of evaporation is greatly reduced.
  4. D.it reduces the incidence of pests.
Show the answer and explanation

Answer: B (it can be used only for specific types of crops.)

Explanation

Being usable only for certain crops is a limitation, not an advantage.