Part 1. Soil and Agroecosystem -- Chapter 1. Cave microbiome for human welfare -- Chapter 2. 2. Diversity of nitrogen fixing symbiotic rhizobia with special reference to Indian Thar Desert -- Chapter 3. Soil microbiota and sustainable Jhum agroecosystem -- Chapter 4. Diversity in Type III secreting systems (T3SS) in Legume-Rhizobial symbiosis -- Chapter 5. Microbe based novel biostimulants for sustainable crop production -- Chapter 6. Ectomycorrhizal diversity and tree sustainability -- Chapter 7. Diversity of AM fungi in relation to sustainable plant production systems -- Chapter 8. Microbial diversity on grapes and other fruits: Role and significance in fermentation -- Chapter 9. Harnessing entomopathogenic fungi for enhanced farm productivity and profitability -- Chapter 10. Bioactive molecules obtained from microbes of the Sundarbans -- Chapter 11. Microbiome engineering in rhizosphere: Potential in improving food security -- Chapter 12. Dynamics of plant-microbiome and its effect on the plant traits -- Part 2. Diversity of Specific microbial Groups -- Chapter 13. Phylogenetic diversity of lichen photobionts, its coevolution with mycobionts, and potential bioprospects -- Chapter 14. Diversity in xylan-degrading prokaryotes and their bioprospects -- Chapter 15. Diversity in cellulose degrading microbes and their cellulases: role in ecosystem sustainability and potential applications -- Chapter 16. New paradigm in degradation of lignocellulosic biomass and discovery of novel microbial strains -- Chapter 17. Secondary metabolism in Trichoderma- chemical and genomic diversity -- Chapter 18. Diversity of chitinase producing bacteria and their possible role in plant pest control -- Chapter 19. Diversity in endophytic microbes and their bioactive compounds -- Chapter 20. Wild edible mushroom of North West Himalaya - their nutritional, neutraceutical and sociobiological Aspects -- Chapter 21. Methanogens for humanwelfare: more boon than bane -- Chapter 22. Genetic diversity in pathogenic yeasts. .