Which of the following is not considered as a primary nutrient for plant?NitrogenOxygenPhosphorousPotassium

Identifying Primary Nutrients

1. Understanding Primary Nutrients
   Primary nutrients are essential elements required by plants in larger quantities for their growth and development. The three main primary nutrients are Nitrogen (N), Phosphorus (P), and Potassium (K). These nutrients play crucial roles in various physiological processes.

2. Evaluating the Options

   • Nitrogen (N): A vital nutrient that aids in leaf and stem development and is part of amino acids and proteins.
   • Phosphorus (P): Important for root development, flowering, and energy transfer within the plant.
   • Potassium (K): Key for water regulation and enzymatic functions in plants.
   • Oxygen (O): While essential for respiration in plants, it is not classified as a primary nutrient since it is obtained through the air rather than the soil.

3. Conclusion
   Based on the definitions and roles of these nutrients in plant growth, it is clear that oxygen, although necessary for respiration, is not a primary nutrient sourced from the soil.

Final Answer

Oxygen is not considered a primary nutrient for plants.