Prilled Urea 46% includes 46% of nitrogen (N) in ureic form, very easily absorbed via the leaves of plants. Absorption through 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. 4. https://coppercathodeexportsuppli86776.birderswiki.com/2320615/black_turtle_beans_nz_an_overview