This book provide chapters on microbes used as biofertilizer, azospirillum, cyanobacteria, mycorrhiza, organic farming. The purpose behind the use of biofertilizers/microbial inoculants in seed, soil or compost pit is to increase the number and biological/metabolic activity of useful microorganisms that accelerate certain microbial processes to increase the extent of availability of nutrients in available forms Easily assimilated by plants. The need for use of biofertilizers has arisen mainly due to two reasons i.e. chemical fertilizers increase soil fertility, crop productivity and production, but increasing/intensive use of chemical fertilizers has changed soil texture, soil fertility and other factors. Biofertilizers from microorganisms can replace chemical fertilizers to increase crop production. In theory, organic fertilizers are less expensive and more environmentally friendly than chemical fertilizers.