New and Future Developments in Microbial Biotechnology and Bioengineering: Microbes in Soil, Crop and Environmental Sustainability reviews the exploitation of microbial biodiversity in soil with respect to nutrient-use efficiency, also discussing the improvement and maintenance of certain physical and chemical conditions in soil that can provide economic and environmental benefits toward agricultural sustainability. The utilization of microbes ranges from applications in biotechnology, marginal land restoration, the formulation of microbial inoculants, the enhancement of crop productivity, and the mitigation of global warming gases. Finally, various uses for microbial resources in crop disease management, bioenergy production, and income based on microbial cultivation are explored.