Lentil (Lens culinaris M.) is a nutritious food legume and is the fourth most important pulse crop in the world.Lentil seed is a rich source of protein, minerals and vitamins for human nutrition and the straw is a valued animal feed. The legumes secrete flavonoids which attract motile rhizobia that attach to the root surface. These bacteria when come in contact with legume roots enhance its growth in a number of ways.Thus integrated use of plant growth promoting rhizobacteria and value-added composted organic waste could be highly effective in improving yield and nodulation of lentil crop.A field study was planned to investigate the integrated effect of plant growth promoting bacteria containing ACC-deaminase,rhizobia and enriched compost on growth,nodulation and yield of lentil. This book provides a vital piece of knowledge for upcoming researchers in field of plant microbiology and nutrition.