Which of the following components is NOT typically found in fertilizers?

Fertilizers are generally composed of essential nutrients that plants require for growth, with nitrogen, phosphorus, and potassium being the primary macronutrients. These three components are known as NPK, which stands for Nitrogen (N), Phosphorus (P), and Potassium (K).

Nitrogen is crucial for promoting lush, green foliage; phosphorus supports root development and flowering; and potassium enhances overall plant health, resistance to disease, and fruit quality.

Oxygen, while essential for plant respiration, is not a component that is actively supplied in fertilizers. Plants typically acquire oxygen from the soil and air rather than from fertilizers. Therefore, it is correct to state that oxygen is not typically found in fertilizers, as the other three components (nitrogen, phosphorus, and potassium) directly contribute to plant nutrition and are specifically included in fertilizer formulations.