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WAEC Agricultural Science 2020 Question 12

Question 12

Soil Properties

An oven dried soil sample of mass 8g had a mass of 1.6g after it was completely burnt. Determine the percentage of humus in the soil sample.

  1. A.6.4%
  2. B.9.6%
  3. C.20%
  4. D.80%
Show the answer and explanation

Answer: D (80%)

Explanation

Mass burnt off = 8 − 1.6 = 6.4 g; 6.4 ÷ 8 × 100 = 80%.