Soil pollution is defined as the contamination of soil in a particular region. Soil pollution is a result of penetration of harmful pesticides and insecticides that deteriorate the soil quality making it unfit for later use. Soil contamination is caused by xenobiotic components or alteration of natural environment. This is usually caused by industrial activity, agricultural chemicals and improper disposal of waste. The most common pollutants are petroleum, polynuclear aromatic carbons, hydrocarbons, solvents, pesticides, lead and other heavy metals