G. Jock Churchman – författare

As the human population grows from seven billion toward an inevitable nine or 10 billion, the demands on the limited supply of soils will grow and intensify. Soils are essential for the sustenance of almost all plants and animals, including humans, but soils are virtually infinitely variable. Clays are the most reactive and interactive inorganic compounds in soils. Clays in soils often differ from pure clay minerals of geological origin. They provide a template for most of the reactive organic matter in soils. They directly affect plant nutrients, soil temperature and pH, aggregate sizes and strength, porosity and water-holding capacities. This book aims to help improve predictions of important properties of soils through a modern understanding of their highly reactive clay minerals as they are formed and occur in soils worldwide. It examines how clays occur in soils and the role of soil clays in disparate applications including plant nutrition, soil structure, and water-holding capacity, soil quality, soil shrinkage and swelling, carbon sequestration, pollution control and remediation, medicine, forensic investigation, and deciphering human and environmental histories.Features:Provides information on the conditions that lead to the formation of clay minerals in soilsDistinguishes soil clays and types of clay mineralsDescribes clay mineral structures and their originsDescribes occurrences and associations of clays in soilDetails roles of clays in applications of soilsHeavily illustrated with photos, diagrams, and electron micrographsIncludes user-friendly description of a new method of identificationTo know soil clays is to enable their use toward achieving improvements in the management of soils for enhancing their performance in one or more of their three main functions of enabling plant growth, regulating water flow to plants, and buffering environmental changes. This book provides an easily-read and extensively-illustrated description of the nature, formation, identification, occurrence and associations, measurement, reactivities, and applications of clays in soils.

The largest part of the world’s food comes from its soils, either directly from plants, or via animals fed on pastures and crops. Thus, it is necessary to maintain, and if possible, improve the quality—and hence good health—of soils, while enabling them to support the growing world population. The Soil Underfoot: Infinite Possibilities for a Finite Resource arms readers with historical wisdom from various populations around the globe, along with current ideas and approaches for the wise management of soils. It covers the value of soils and their myriad uses viewed within human and societal contexts in the past, present, and supposed futures.In addition to addressing the technical means of maintaining soils, this book presents a culturally and geographically diverse collection of historical attitudes to soils, including philosophical and ethical frameworks, which have either sustained them or led to their degradation. Section I describes major challenges associated with climate change, feeding the increasing world population, chemical pollution and soil degradation, and technology. Section II discusses various ways in which soils are, or have been, valued—including in film and contemporary art as well as in religious and spiritual philosophies, such as Abrahamic religions, Maori traditions, and in Confucianism.Section III provides stories about soil in ancient and historic cultures including the Roman Empire, Greece, India, Japan, Korea, South America, New Zealand, the United States, and France. Section IV describes soil modification technologies, such as polymer membrane barriers, and soil uses outside commercial agriculture including the importance of soils for recreation and sports grounds. The final section addresses future strategies for more effective sustainable use of soils, emphasizing the biological nature of soils and enhancing the use of "green water" retained from rainfall.

As the human population grows from seven billion toward an inevitable nine or 10 billion, the demands on the limited supply of soils will grow and intensify. Soils are essential for the sustenance of almost all plants and animals, including humans, but soils are virtually infinitely variable. Clays are the most reactive and interactive inorganic compounds in soils. Clays in soils often differ from pure clay minerals of geological origin. They provide a template for most of the reactive organic matter in soils. They directly affect plant nutrients, soil temperature and pH, aggregate sizes and strength, porosity and water-holding capacities. This book aims to help improve predictions of important properties of soils through a modern understanding of their highly reactive clay minerals as they are formed and occur in soils worldwide. It examines how clays occur in soils and the role of soil clays in disparate applications including plant nutrition, soil structure, and water-holding capacity, soil quality, soil shrinkage and swelling, carbon sequestration, pollution control and remediation, medicine, forensic investigation, and deciphering human and environmental histories.Features:Provides information on the conditions that lead to the formation of clay minerals in soilsDistinguishes soil clays and types of clay mineralsDescribes clay mineral structures and their originsDescribes occurrences and associations of clays in soilDetails roles of clays in applications of soilsHeavily illustrated with photos, diagrams, and electron micrographsIncludes user-friendly description of a new method of identificationTo know soil clays is to enable their use toward achieving improvements in the management of soils for enhancing their performance in one or more of their three main functions of enabling plant growth, regulating water flow to plants, and buffering environmental changes. This book provides an easily-read and extensively-illustrated description of the nature, formation, identification, occurrence and associations, measurement, reactivities, and applications of clays in soils.

The book provides a wide introduction on history, minerology, geology, and the characteristics and application of different natural nanotubes. It is the first comprehensive book to discuss natural nanotubes, particularly halloysite nanotubes. The book will be useful mainly for postgraduate students and researchers working on the application of natural nanotubes. It will also be useful for those companies or researchers that focus on the design of materials and composites for sustainability.This book:• Provides updates on the diverse and expanding applications of natural mineral nanotubes (including halloysite, sepiolite, and palygorskite) in various industries, and polymer nanocomposites for medical, health, and environmental applications• Provides a comprehensive review of the modification and intercalation of different natural mineral nanotubes• Reviews recent studies of the mechanical properties of halloysite nanotubes• Provides an up-to-date background on the structure, identification, and nomenclature of various natural mineral nanotubes, including halloysite, palygorskite, sepiolite, chrysotile, and erionite• Gives comprehensive global information on the mineralogy, geology, and occurrence of natural mineral nanotubes• Discusses the current understanding of the health risks of natural mineral nanotubes