Prilled urea 46% involves 46% of nitrogen (N) in ureic form, very easily absorbed through the leaves of plants. Absorption with the root system is slower, because urea in soil is converted (like a result of enzymatic hydrolysis) into the ammonia form available for plants, and then into nitrate form. https://fertilizer-dap-full-form86173.blogunteer.com/35907432/fascination-about-npk-fertilizer-home-made