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WAEC Agricultural Science 2000 Question 20

Question 20

Soil Fertility and Plant Nutrition

In agriculture, which of the following statements best explains the equation below: (NH4)2SO4 + 4O2 → 2HNO3 + H2SO4 + H2O

  1. A.The increase in soil acidity resulting from sulphate of ammonia
  2. B.The increase of soil nutrients by sulphate of ammonia
  3. C.The release of soil nutrients by sulphate of ammonia
  4. D.The neutralization of sulphate of ammonia in the soil.
Show the answer and explanation

Answer: A (The increase in soil acidity resulting from sulphate of ammonia)

Explanation

The products are nitric and sulphuric acids, so the soil becomes more acidic.