In the times past, the farmers were keen in the usage of chemical fertilizer as it result to high yield. But eventually, they realized that chemical fertilizer affects the soil nutrients and kills the essential microbes which enhance the growth of crops. The negative impact faced using chemical fertilizers were affecting not only the soil but also human beings who eat these farm products . Generally agricultural products which includes bio-fertilizer are used to replace the usage of chemical fertilizers as it does not contain any toxic substance and makes the soil enriched 1.1 Sustainability of Bio-fertilizers.