Prilled Urea 46% contains 46% of nitrogen (N) in ureic form, very easily absorbed from the leaves of plants. Absorption through the root system is slower, because urea in soil is transformed (like a results of enzymatic hydrolysis) into the ammonia form available for plants, and then into nitrate form. https://sites2000.com/story11331344/how-much-you-need-to-expect-you-ll-pay-for-a-good-black-soy-beans-vs-soy-beans