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WAEC Agricultural Science 1988 Question 7

Question 7

Rocks and Soil Formation

In which layer of the soil profile does most biological activity occur?

  1. A.Parent material
  2. B.D – horizon
  3. C.C – horizon
  4. D.B – horizon
  5. E.A – horizon.
Show the answer and explanation

Answer: E (A – horizon.)

Explanation

The A-horizon (topsoil) holds most organic matter, roots and soil organisms.