NPK Fertilizer is a material that is added to the soil to supply two or more elements required for plant growth and productiveness. NPK Fertilizers enhance the natural fertility of the soil or replace the chemical elements taken from the soil by harvesting, grazing, leaching or erosion. Artificial fertilizers are inorganic fertilizers formulated in appropriate concentrations and combinations supply two or three main nutrients: Nitrogen, Phosphorus and Potassium (N, P and K) for various crops and growing conditions. N (Nitrogen) promotes leaf growth and forms proteins and chlorophyll.