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WAEC Agricultural Science 2023 Question 28

Question 28

Soil Fertility and Plant Nutrition

Which of the following combinations of NPK fertilizer is recommended for the cultivation of yam and cassava?

  1. A.10:10:10
  2. B.10:10:20
  3. C.20:10:10
  4. D.20:20:10
Show the answer and explanation

Answer: B (10:10:20)

Explanation

Tubers need more potassium, the last number in N:P:K.