Urea is an inexpensive form of nitrogen fertilizer with an NPK (nitrogen-srus-potassium) ratio of 46-0-0. Although urea is naturally produced in humans and animals, synthetic urea is manufactured with anhydrous ammonia.
Fertilizer urea. The agricultural industry widely uses urea, a white crystald containing 46 percent nitrogen as an animal feed additive and fertilizer. Here, we'll focus on its role as a nitrogen fertilizer.