Prilled urea forty six% contains 46% of nitrogen (N) in ureic form, simply absorbed through the leaves of plants. Absorption from the root system is slower, because urea in soil is transformed (as being a results of enzymatic hydrolysis) into the ammonia form available for plants, and then into nitrate https://infopagex.com/story5692032/the-smart-trick-of-npk-fertilizer-when-to-apply-that-no-one-is-discussing