Urea/jʊˈriːə/ Definition 1 of 2Pro Tip 1/3Inorganic Substance Urea is a natural chemical compound, not to be confused with man-made substances. The urea found in urine is the same as what's in fertilizers. Pro Tip 2/3Essential Nutrient Urea is high in nitrogen, vital for plant growth, explaining its use as a fertilizer. Urea's nitrogen content strengthens the crops. Pro Tip 3/3Non-Toxic While urea is found in urine, it's safe and non-toxic in fertilizers and feed. Don't worry, the urea in this feed is harmless to animals.