Urea fertilizer is a white crystalline substance with a high nitrogen content (\(46\%\)), making it a popular choice for promoting green, leafy growth in plants. It is a cost-effective, versatile nitrogen source that boosts photosynthesis and crop yield when used correctly. To be effective, urea must be incorporated into the soil through mixing, plowing, or irrigation, because it can otherwise lose nitrogen as a gas, especially in warm, moist conditions.