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WAEC Agricultural Science 1991 (August) Question 1

Question 1

Rocks and Soil Formation

Use the diagram (a soil profile with layers labelled I to V) to answer this question. The most weathered and leached area is labelled

Diagram for this question
  1. A.I
  2. B.II
  3. C.III
  4. D.IV
  5. E.V
Show the answer and explanation

Answer: B (II)

Explanation

The topsoil (II) is the zone most exposed to weathering, and rain water washing down leaches its nutrients.