This book presents the multidisciplinary nature and the many fascinating aspects of microbiological approaches for crop improvement in both conventional and stressed soils where quality and safety are the key concerns. The major goal is to provide a cross-section of the latest accomplishments and envisaged future directions in these areas. It gives a holistic view of the basic concepts and practical utility of microbes and thus presents an all-inclusive contemporary treatise on strategic aspects of the diverse microbial communities providing solutions to oodles of customary agronomic problems. This book benefits people working in the area of agronomy, biotechnology, environmental biology, microbiology, plant physiology, plant protection and soil science. The contributions by eminent academicians and professionals ensure a good equilibrium between theory and practice without compromising the basic conceptual framework of the concerned subject.