Prilled urea 46% contains 46% of nitrogen (N) in ureic form, simply absorbed with the leaves of plants. Absorption from the root system is slower, because urea in soil is transformed (as a result of enzymatic hydrolysis) into the ammonia form available for plants, then into nitrate form. Increase to https://socialfactories.com/story5807889/the-greatest-guide-to-npk-fertilizer-how-to-make