What is the main hazard associated with Urea (46-0-0)?

Urea (46-0-0) is primarily recognized for its rapid hydrolysis when applied to soil. The main hazard associated with urea is its tendency to quickly convert into ammonia through hydrolysis, especially in the presence of moisture and microbial activity. Once urea is applied, it can swiftly break down into ammonium carbonate, which may volatilize into ammonia gas if not incorporated into the soil effectively. High levels of ammonia can lead to nitrogen losses to the atmosphere, which negatively affects nitrogen use efficiency and may contribute to environmental issues, such as air pollution.

While the other factors listed, such as high cost and corrosion to equipment, are considerations in the use and application of fertilizers, they do not pose the same immediate risks to effective nutrient management as rapid hydrolysis does. Low nitrogen content is also not applicable in this case since urea is known for its high nitrogen concentration. Understanding the hydrolysis process of urea helps in optimizing its application methods to minimize nitrogen losses and maximize its effectiveness as a fertilizer.