262To answer to the food demand, all farmers try to maximize the crops they can cultivate on their land. For decades, farmers have used fertilizers to increase their crop yields. With the green revolution, more environment friendly but still effective biofertilizers have been introduced, and they are widely used all over the world, especially in areas where the usage of synthetic fertilizers has ruined the natural nutrient levels of the soil. Biofertilizers are a way to increase crop production by naturally optimizing the nutrient levels of the soil. A biofertilizer is a substance which contains living microorganisms which, when applied to seed, plant surfaces, or soil, colonizes the rhizo- sphere or the interior of the plant, and promotes growth by increasing the supply or availability of primary nutrients to the host plant. The microor- ganisms in biofertilizers restore the soil’s natural nutrient cycle and build soil organic matter. Through the use of biofertilizers, healthy plants can be grown, while enhancing the sustainability and the health of the soil. As they play several roles, a preferred scientific term for such beneficial bacteria is “plant-growth promoting rhizobacteria.” Therefore, they are extremely advantageous in enriching soil fertility and fulfilling plant nutrient require- ments by supplying the organic nutrients through microorganism and their by-products.