Prilled Urea forty six% contains 46% of nitrogen (N) in ureic form, simply absorbed from 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, and then into nitrate form. https://directoryrelt.com/listings1198525/5-simple-statements-about-borlotti-beans-freezing-explained