Prilled Urea 46% contains 46% of nitrogen (N) in ureic form, effortlessly absorbed by the leaves of plants. Absorption through the foundation system is slower, because urea in soil is transformed (being a result of enzymatic hydrolysis) into the ammonia form available for plants, and after that into nitrate form. https://thetopdirectory.com/listings13573955/not-known-details-about-urea-fertilizer-subsidy