Carbon and nitrogen cycling in soil Several textbooks and edited volumes are currently available on general soil fertility but‚ to date‚ none have been dedicated to the study of “Sustainable Carbon and Nitrogen Cycling in Soil.” Yet this aspect is extremely important considering the fact that the soil as the ‘epidermis of the Earth’ (geodermis)‚ is a major component of the terrestrial biosphere. This book addresses virtually every aspect of C and N cycling including: general concepts on the diversity of microorganisms and management practices for soil the function of soil’s structure function ecosystem the evolving role of C and N cutting edge methods used in soil microbial ecological studies rhizosphere microflora the role of organic matter (OM) in agricultural productivity C and N transformation in soil biological nitrogen fixation (BNF) and its genetics plant growth promoting rhizobacteria (PGPRs) PGPRs and their role in sustainable agriculture organic agriculture etc. The book’s main objectives are: (1) to explain in detail the role of C and N cycling in sustaining agricultural productivity and its importance to sustainable soil management; (2) to show readers how to restore soil health with C and N; and (3) to help them understand the matching of C and N cycling rules from a climatic perspective. Given its scope the book offers a valuable resource for educators researchers and policymakers as well as undergraduate and graduate students of soil science soil microbiology agronomy ecology and the environmental sciences. Gathering cutting edge contributions from internationally respected researchers it offers authoritative content on a broad range of topics which is supplemented by a wealth of data tables figures and photographs. Moreover it provides a roadmap for sustainable approaches to food and nutritional security and to soil sustainability in agricultural systems based on C and N cycling in soil systems