Essential elements are the elements required by any organism for it’s normal growth.These are of two types of essential elements Macronutrients (Present in large amounts like Calcium, Magnesium etc.) and Micronutrients (Present in small amounts like Iron,Zinc etc.).They perform the following functions like being a component of biomolecules, being a structural component of energy related chemical compounds and activation or inhibition of enzymes but do not change the chemistry of soil.