Prilled urea forty six% consists of 46% of nitrogen (N) in ureic form, easily absorbed with the leaves of plants. Absorption with the root system is slower, because urea in soil is transformed (as a results of enzymatic hydrolysis) into the ammonia form available for plants, then into nitrate form. https://cyberbookmarking.com/story20226353/the-basic-principles-of-npk-ferterlizer