- Urea (46-0-0) • CO(NH2)2
- white
- Manufactured from ammonia and carbon dioxide
- Most commonly used fertilizer N source worldwide
- Urea converts to the ammonium form of N in the soil. The urease enzyme — present in soil, bacteria and crop residues — speeds the process. Surface-applied urea is subject to losses of ammonia gas. Losses increase with higher soil pH, greater crop residue cover and higher temperatures.
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