Question 17
Soil Fertility and Plant NutritionDetermine the weight of potassium in a 50 kg NPK (20:20:10) bag of fertilizer.
- A.5.0 kg
- B.7.0 kg
- C.10.0 kg
- D.20.0 kg
Show the answer and explanation
Answer: A (5.0 kg)
Explanation
NPK 20:20:10 has 10% potash, so 50 kg × 10/100 = 5.0 kg.