Nitrogen
nitrogen: a chemical element that is the main component of air and an essential part of protein. It is essential to biological life. Nitrogen is taken into the body by digesting protein-rich foods. Excess nitrogen is excreted in urine. When the intake of nitrogen and the excretion rate are equal, the body is in nitrogen balance or protein balance. Nitrogen is supplied to the soil by fertilizers, organic matter, nodule bacteria on legumes, and by nitrogen-fixing microorganisms in the soil. Proper nitrogen management is critical for optimizing crop growth and productivity. Farmers can benefit from understanding nitrogen’s role in plant nutrition and adopting practices that ensure efficient nitrogen use. This includes regular soil testing, using nitrogen-efficient crop varieties, and applying fertilizers at the right time and rate. Effective nitrogen management improves crop yields, reduces environmental impact, and enhances farm profitability.