More than 90% of the world’s urea production is allocated for agricultural use as nitrogen fertilizer. Urea is either applied directly as a straight fertilizer to the soil or as an ingredient for various tailor-made bulk blends. Alternatively, urea is also a valuable raw material for compound fertilizers, as well as in solutions for fertigation. Another very important application of urea is the production of chemical compounds, such as formaldehyde resins and adhesives, widely used in the chipboard and furniture industry. Very high technical quality urea is used automobile system for reduction of the nitrogen oxides in the exhaust gases

Sulfur is essential for many growth functions in plants including nitrogen metabolism, enzyme activity, and protein and oil synthesis. Generally, sulfur-deficient plants have short and/or spindly stems and yellowing of the young (top) leaves. With nitrogen deficiency, yellowing affects the older, lower leaves first.