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Agricultural conservation --- Soil conservation --- Agriculture and state --- Rural development --- Economic aspects --- Economic aspects

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Agricultural conservation --- Government policy --- Commodity Credit Corporation --- Rules and practice --- Evaluation.

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Agroforestry --- Agrobiodiversity --- Agrobiodiversity conservation --- Conservation of agrobiodiversity --- Agricultural conservation --- Biodiversity conservation --- Agro-forestry --- Agriculture --- Forests and forestry --- Tree crops --- Agricultural biodiversity --- Agricultural biological diversity --- Agro-biodiversity --- Agricultural ecology --- Biodiversity --- Environmental aspects --- Agroforestry - Tropics --- Agrobiodiversity - Tropics --- Agroforestry - Environmental aspects - Tropics --- Agrobiodiversity conservation - Tropics

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The production of a vast array of chemicals, especially petroleum compounds during the last century, has caused a serious deterioration in environmental quality. In this context, one major threat is posed by the continually expanding areas of contaminated soils and sediments. Biotechnological methods based on the biodegradation of environmental pollutants or phytoremediation of persistent organic contaminants and metals are being developed. Bioremediation has now been used successfully to remediate many petroleum-contaminated sites. However, there are as yet no commercial technologies commonly used to remediate the most recalcitrant contaminants, such as explosives, pesticides and metallic pollutants. Nevertheless, bioremediation is a rapidly advancing field and new bio-based remedial technologies are continuing to emerge. For this volume, a number of experts from universities, government laboratories and industry, have contributed chapters on innovative methods in bioremediation and phytoremediation.

Soil remediation. --- Bioremediation. --- Phytoremediation. --- Sols --- Biorestauration --- Phytorestauration --- Décontamination --- Décontamination --- Soil science. --- Soil conservation. --- Environmental pollution. --- Microbiology. --- Ecotoxicology. --- Soil Science & Conservation. --- Terrestrial Pollution. --- Applied Microbiology. --- Ecotoxicology --- Pollutants --- Pollution --- Environmental health --- Toxicology --- Microbial biology --- Biology --- Microorganisms --- Chemical pollution --- Chemicals --- Contamination of environment --- Environmental pollution --- Contamination (Technology) --- Asbestos abatement --- Bioremediation --- Environmental engineering --- Environmental quality --- Factory and trade waste --- Hazardous waste site remediation --- Hazardous wastes --- In situ remediation --- Lead abatement --- Refuse and refuse disposal --- Conservation of soil --- Erosion control, Soil --- Soil erosion --- Soil erosion control --- Soils --- Agricultural conservation --- Soil management --- Pedology (Soil science) --- Agriculture --- Earth sciences --- Environmental aspects --- Control --- Prevention --- Conservation

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Genetics and Regulation of Nitrogen-Fixing Bacteria This book is the second volume of a seven-volume series, which covers all fields of research related to nitrogen fixation - from basic studies through applied aspects to environmental impacts. Volume II provides a comprehensive and detailed source of information concerning the genetics and regulation of biological nitrogen fixation in free-living prokaryotes. This preface attempts to provide the reader with some insight into how this volume originated, how it was planned, and then how it developed over the several years of its production. Once the editorial team was established, the first job was to decide which of the many free-living diazotrophs that have been subjected to genetic analysis should be included in this volume. Would we need to develop specific criteria for selection or would the organisms, in effect, select themselves? Of course, Klebsiella pneumoniae and Azotobacter vinelandii, which have served (and still serve) as the main model organisms for the genetic analysis of diazotrophy, plus some of the other bacteria described in this volume, did indeed select themselves. However, there was considerable discussion surrounding well-characterized fixing species, like Azorhizobium caulinodans and Herbaspirillum seropedicae, both of which are able to fix atmospheric N under free-living conditions.

Nitrogen-fixing microorganisms. --- Nitrogen --- Bacterial genetics. --- Micro-organismes fixateurs d'azote --- Azote --- Génétique bactérienne --- Fixation. --- Metabolism --- Fixation --- Métabolisme --- Bacteria --- Fixation de l'azote --- Nitrogen fixation --- Klebsiella --- Clostridium --- Code génétique --- genetic code --- Écologie microbienne --- microbial ecology --- Molybdène --- Molybdenum --- Nitrogen -- Fixation. --- Nitrogen -- Metabolism -- Regulations. --- Nitrogen-fixing microorganisms --- Bacterial genetics --- Microbiology & Immunology --- Biology --- Health & Biological Sciences --- Regulation --- Regulation. --- Microbiology. --- Microbial genetics. --- Microbial genomics. --- Bacteriology. --- Soil conservation. --- Microbial Genetics and Genomics. --- Soil Science & Conservation. --- Conservation of soil --- Erosion control, Soil --- Soil erosion --- Soil erosion control --- Soils --- Agricultural conservation --- Soil management --- Microbiology --- Genomics --- Microbial genetics --- Microorganisms --- Genetics --- Microbial biology --- Control --- Prevention --- Conservation --- Soil science. --- Pedology (Soil science) --- Agriculture --- Earth sciences --- Archaea