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WAEC Agricultural Science 2008 Question 15

Question 15

Soil Fertility and Plant Nutrition

A farmer applied NPK 15:11:8 at planting. What is the percentage of potassium in the fertilizer?

  1. A.23.53%
  2. B.32.35%
  3. C.33.33%
  4. D.44.12%.
Show the answer and explanation

Answer: A (23.53%)

Explanation

Potassium's share of the nutrients = 8 ÷ (15 + 11 + 8) × 100 = 23.53%.