Prilled urea forty six% incorporates 46% of nitrogen (N) in ureic form, easily absorbed via the leaves of plants. Absorption from the root system is slower, because urea in soil is converted (for a result of enzymatic hydrolysis) into the ammonia form available for plants, after which into nitrate form. https://onelifesocial.com/story5695093/the-basic-principles-of-npk-ferterlizer