Abstract: Agriculture is very essential for human existence on this world. These days with growing population we need the productivity of the agriculture to be increased to meet the demands of larger population. In earlier days formers used natural methods of farming to increase the productivity, such as using the cow dung as a fertilizer. That resulted increase in the productivity enough to meet the requirements of the population. But later they started thinking of earning more profit by getting more production of crops. So, there came “Green Revolution”. After this period usage of deadly poisons as herbicides has increased to a drastic level.