Prilled urea forty six% contains 46% of nitrogen (N) in ureic form, simply absorbed through the leaves of plants. Absorption throughout the root system is slower, because urea in soil is transformed (to be a results of enzymatic hydrolysis) into the ammonia form available for plants, then into nitrate form. https://dap-fertilizer75246.wikitelevisions.com/8175920/an_unbiased_view_of_fertilizer_urea_composition