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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 objectivesare: (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.

Agro-Ecosystem Diversity: Impact on Food Security and Environmental Quality presents cutting-edge exploration of developing novel farming systems and introduces landscape ecology to agronomy. It encompasses the broad range of links between agricultural development and ecological impact and how to limit the potential negative results. Presented in seven sections, each focusing on a specific challenge to sustaining diversity, the book provides insights toward the argument that by re-introducing diversity, it should be possible to maintain a high level of productivity of agro-ecosystems while also maintaining and/or restoring a satisfactory level of environment quality and biodiversity. - Demonstrates that diversified agro-ecosystems can be intensified with environmental quality preserved, restored and enhanced - Includes analysis of economic constraints leading to specialization of farms and regions and the social locking forces resisting to diversification of agro-ecosystems - Presents a global vision of world agriculture and the tradeoff between a necessary increase in food production and restoring environment quality

Cet ouvrage présente un état des connaissances actuelles indispensables pour comprendre leurs mécanismes des pollutions et les milieux étudiés.Il rassemble les bases théoriques permettant d'appréhender le comportement de polluants tant d'origine agricole (nitrates et pesticides) qu'organique (virus et bactéries) ou industrielle. Il présente diverses méthodes pour les identifier, évaluer leur concentration, leur origine ou leur devenir. Les processus géochimiques à l'œuvre dans chaque milieu naturel (sols et aquifères) sont décrits, ainsi que l'influence de la morphologie des sédiments et des écoulements sur ces processus.Enfin, ce livre détaille les outils nécessaires aux professionnels : bases de la législation, modes de prélèvement, techniques de réhabilitation, réactions chimiques advenant dans le milieu rural. Le dernier chapitre est consacré aux logiciels de modélisation des réactions chimiques dans le contexte des pollutions, outils modernes en fort développement.L'actualisation de cette nouvelle version porte sur la législation, avec une mise à jour des données issues du Code de l'environnement, et sur la procédure réglementaire de traitement des sites et sols pollués qui a évolué de façon significative en France depuis 2007.