Prilled Urea 46% consists of forty six% of nitrogen (N) in ureic form, conveniently absorbed via the leaves of plants. Absorption through the basis system is slower, because urea in soil is converted (as a results of enzymatic hydrolysis) into the ammonia form available for plants, then into nitrate form. https://jacquesc736bnd4.verybigblog.com/40196562/a-review-of-npk-fertilizer-video