Prilled urea 46% consists of 46% of nitrogen (N) in ureic form, simply absorbed through the leaves of plants. Absorption in the root system is slower, because urea in soil is transformed (as being a result of enzymatic hydrolysis) into the ammonia form available for plants, then into nitrate form. https://dap-fertilizers16623.dm-blog.com/37049525/the-2-minute-rule-for-butter-beans-whole-foods