The primary nutrient required for plant growth is nitrogen. Nitrogen is a crucial component of amino acids, proteins, and nucleic acids, which are vital for the synthesis of plant tissues. It helps in the formation of chlorophyll, facilitating photosynthesis and energy production within plants. While plants can also benefit from other nutrients like phosphorus and potassium, nitrogen is often the most limiting nutrient in agricultural systems. Ensuring an adequate supply of nitrogen can enhance crop yield and quality, making it essential for food production.