The most important nutrient for plant growth is nitrogen. Nitrogen is a crucial component of amino acids, proteins, and nucleic acids, playing a vital role in various physiological processes in plants. It is essential for chlorophyll formation, which is necessary for photosynthesis, enabling plants to convert sunlight into energy. Additionally, nitrogen promotes healthy leaf growth and overall plant vigor. While nitrogen is naturally abundant in the atmosphere, plants cannot utilize atmospheric nitrogen directly. Therefore, it is typically supplied through fertilizers or nitrogen-fixing bacteria in the soil, ensuring optimal growth and productivity in crops.