Explanation:

Ans. Urea 

Urea, also known as carbamide, is an organic compound with chemical formula CO(NH2)2. This amide has two –NH2 groups joined by a carbonyl functional group. Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.

Compound Fertilizer is the fertilizer which contains two or three nutrients of N, P, K. NPK fertilizers are three-component fertilizers providing nitrogen, phosphorus, and potassium. It is available in powder or granular form. Compound fertilizers show their nutrient content with three bold numbers on the package. Represented by three different major nutrient content: Nitrogen, Phosphorous, and Potash (Potassium), we can describe such content with the letters N-P-K. Nitrogen helps plant foliage to grow strong. Phosphorous helps root development and promote flowering. Potassium (Potash) is important for overall plant health and helps in fruiting. Imbalance fertilizers usage will affect growth and hence more susceptible to attacks by diseases and pests.