Granular and Prilled Urea is a nitrogen-based product that has a nitrogen content of 46%. It is sold into agricultural markets as a fertilizer and into industrial markets as a raw material to produce resins. Urea is the most popular and economical of all nitrogenous fertilizers being used worldwide. Unlike phosphate and potassium fertilizers, which normally require a single application, urea needs to be applied several times during the growing season.