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Question

The three elements most usually contained in fertilizers are:
  1. Potassium, phosphorus and carbon
  2. Sodium, nitrogen and phosphorus
  3. Silica, nitrogen and phosphorus
  4. Potassium, phosphorus and nitrogen

A
Silica, nitrogen and phosphorus
B
Potassium, phosphorus and nitrogen
C
Sodium, nitrogen and phosphorus
D
Potassium, phosphorus and carbon
Solution
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The correct option is D Potassium, phosphorus and nitrogen
Fertilizers are composed of three macronutrients, NPK nitrogen, phosphorous and potassium.
Nitrogen (N): Leaf growth;
Phosphorus (P): Development of roots, flowers, seeds, fruit;
Potassium (K): Strong stem growth, movement of water in plants, promotion of flowering and fruiting;

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