The elements required for normal growth, development and survival of plants are called essential nutrients. According to scientist E. Epstein (1972), those elements that cause the normal life cycle of plants and play a role in body structure or metabolism are called essential elements. The branch of plant physiology that deals with mineral salts absorption from soil, storage, distribution to various organs and role in normal growth is called mineral nutrition. The process of absorption of mineral salts for healthy growth, physical development and replenishment of the plant body is called nutrition. 17 essential substances are essential for normal growth and physical development of plants. These elements are of two types. Macronutrients or macromolecules and micronutrients or micromolecules.