Rattan Lal – författare

This book brings together current knowledge of terrestrial C sequestration in Central Asia. The themes treated include: biophysical environments, water resources, sustainable agriculture, soil degradation, the effects of irrigation schemes on secondary salinization, soil management and its relationship to carbon dynamics; the relationship between forest management and carbon dynamics, economic analyses of land use practices, important methodological issues arising from the use of GIS, remote sensing, carbon budgeting and scaling, and a review of the knowledge gaps in carbon and climate change. The book is a reference source for soil, water, vegetation, climate, land use and management in the region. The book will be of interest to a wide variety of environmental scientists, economists and those interested in policy issues for the sustainable management of natural resources.

Better Manage Soil C for Improved Soil Quality In the United States, soil has fueled the availability of abundant, safe food, thus underpinning economic growth and development. In the future we need to be more vigilant in managing and renewing this precious resource by replacing the nutrients and life-sustaining matter that we remove for our own needs. Taking these issues into consideration, Soil Carbon Management: Economic, Environmental, and Societal Benefits explores all of the advantages of effective soil carbon (C) management. A Different Way of Examining Soil C Management This unique resource provides a new conceptual framework to develop policies for managing and enhancing soil C and presents new approaches to achieve positive environmental outcomes. In each chapter, the book poses a problem or set of problems and then describes how effective soil C management can help to solve these challenges, listing the multiple benefits that arise from these practices. The book addresses specific problems such as soil erosion and land degradation and evaluates the advantages of soil C sequestration, specifically for policy development purposes. The policies discussed can be tailored to meet regional and local needs and constraints. The book also explains how to achieve an ideal environment by applying beneficial practices for farming and land management. A Plan for the Future Illustrating how to conserve and preserve soil quality for future generations and detailing how to restore the ecological functions of soil, this book will aid in the formulation of future agricultural policies that sustain food and fuel needs and have long-lasting, positive environmental impacts.

Featuring contributions from leading experts in the field, Climate Change and Managed Ecosystems examines the effects of global climate change on intensively constructed or reconstructed ecosystems, focusing on land use changes in relation to forestry, agriculture, and wetlands including peatlands. The book begins by discussing the fragility of ecosystems in the face of changing climates, particularly through human caused increases in atmospheric GHGs. The chapters delineate how and why the climate has changed and what can be expected to occur in the foreseeable future. They identify the potential adaptation responses to reduce the impacts of a changing climate.Using this information as a foundation, the chapter authors examine what is known about the impacts of climate on agricultural, forested, and wetland ecosystems. They illustrate the importance of these ecosystems in the global carbon cycle and discuss the potential interaction between terrestrial and atmospheric carbon pools under changing climactic conditions. The book delineates what needs to be done to ensure continued stability in these ecosystems. It includes a description of activities that have been undertaken in the past to identify gaps in understanding GHG emissions from agriculture, forests, and wetlands and their mitigation, as well as current research initiatives to address these gaps.The book presents an overview of how economic reasoning can be applied to climate change and illustrates how terrestrial carbon-uptake credits (offset credits) operate within the Kyoto Protocol framework. By identifying gaps in the current understanding of adaptation of mitigation strategies, the book underscores the need to make management of these ecosystems part of a global solution.

In order to feed their burgeoning populations, developing nations will need to double cereal production by the year 2050. This increase will have to come from existing land, as little potential exists for bringing new land under cultivation -- a daunting prospect when one realizes that increased use and significantly higher concentrations of carbon dioxide have led to a severe depletion of the carbon pool in the world's soils. This is especially telling in developing countries where tropical climates further compromise the soil's ability to recover.In Climate Change and Global Food Security, bestselling editor Rattan Lal heads up a team of the world's top soil scientists and ecologists to document the history of this impending agricultural crisis and explore possible solutions. Throughout this timely text, the authors address six complex themes:1. The impact of projected climate change on soil quality, water resources, temperature regime, and growing season duration on net primary productivity of different biomes2. Soil carbon dynamics under changing climate3. The impact of changes in carbon dioxide and ecological environments on agronomic yields and food production in different regions of the world4. World food demands and supply during the 21st century5. Policy and economic issues related to carbon trading and enhancing agricultural production6. Research and development priorities for enhancing soil carbon pool and food securityThis hard-hitting text is essential reading for anyone involved with soil and crop sciences as well as policy makers and change agents who need to come to the forefront of this issue armed with the latest information and viable solutions.

Principles of Soil Physics examines the impact of the physical, mechanical, and hydrological properties and processes of soil on agricultural production, the environment, and sustainable use of natural resources. The text incorporates valuable assessment methods, graphs, problem sets, and tables from recent studies performed around the globe and offers an abundance of tables, photographs, and easy-to-follow equations in every chapter.The book discusses the consequences of soil degradation, such as erosion, inhibited root development, and poor aeration. It begins by defining soil physics, soil mechanics, textural properties, and packing arrangements . The text continues to discuss the theoretical and practical aspects of soil structure and explain the significance and measurement of bulk density, porosity, and compaction.The authors proceed to clarify soil hydrology topics including hydrologic cycle, water movement, infiltration, modeling, soil evaporation, and solute transport processes. They address the impact of soil temperature on crop growth, soil aeration, and the processes that lead to the emission of greenhouse gases. The final chapters examine the physical properties of gravelly soils and water movement in frozen, saline, and water-repellant soils.Reader-friendly and up-to-date, Principles of Soil Physics provides unparalleled coverage of issues related to soil physics, structure, hydrology, aeration, temperature, and analysis and presents practical techniques for maintaining soil quality to ultimately preserve its sustainability.

Focusing on the technical, social, and economic issues involved in watershed management, this interdisciplinary author team focuses on bettering land use practices and the condition of soil water resources.Integrated Watershed Management in the Global Ecosystem is a volume composed from an international symposium of the world's leading experts and practitioners in soil and water conservation exploring an "ecosystem-based" management approach to the problem.Readers of this volume will quickly appreciate why inattention to the issues of continued land and water degradation stresses human populations. This volume seeks positive results through better understanding of the issues and improved management approaches.This volume is useful to soil scientists, horticulturists, forestry researchers, environmental scientists and social scientists.

The term "soil health" refers to the functionality of a soil as a living ecosystem capable of sustaining plants, animals, and humans while also improving the environment. In addition to soil health, the environment also comprises the quality of air, water, vegetation, and biota. The health of soil, plants, animals, people, and the environment is an indivisible continuum. One of the notable ramifications of the Anthropocene is the growing risks of decline in soil health by anthropogenic activities. Important among these activities are deforestation, biomass burning, excessive soil tillage, indiscriminate use of agrochemicals, excessive irrigation by flooding or inundation, and extractive farming practices. Soil pollution, by industrial effluents and urban waste adversely impacts human health. Degradation of soil health impacts nutritional quality of food, such as the uptake of heavy metals or deficit of essential micro-nutrients, and contamination by pests and pathogens. Indirectly, soil health may impact human health through contamination of water and pollution of air.This book aims to:Present relationships of soil health to human health and soil health to human nutrition. Discuss the nexus between soil degradation and malnourishment as well as the important links between soil, plant, animal and human health. Detail reasons oil is a cause of infectious diseases and source of remedial measures.Part of the Advances in Soil Sciences series, this informative volume covering various aspects of soil health appeals to soil scientists, environmental scientists and public health workers.

The term "soil health" refers to the functionality of a soil as a living ecosystem capable of sustaining plants, animals, and humans while also improving the environment. In addition to soil health, the environment also comprises the quality of air, water, vegetation, and biota. The health of soil, plants, animals, people, and the environment is an indivisible continuum. One of the notable ramifications of the Anthropocene is the growing risks of decline in soil health by anthropogenic activities. Important among these activities are deforestation, biomass burning, excessive soil tillage, indiscriminate use of agrochemicals, excessive irrigation by flooding or inundation, and extractive farming practices. Soil pollution, by industrial effluents and urban waste adversely impacts human health. Degradation of soil health impacts nutritional quality of food, such as the uptake of heavy metals or deficit of essential micro-nutrients, and contamination by pests and pathogens. Indirectly, soil health may impact human health through contamination of water and pollution of air.This book aims to:Present relationships of soil health to human health and soil health to human nutrition. Discuss the nexus between soil degradation and malnourishment as well as the important links between soil, plant, animal and human health. Detail reasons oil is a cause of infectious diseases and source of remedial measures.Part of the Advances in Soil Sciences series, this informative volume covering various aspects of soil health appeals to soil scientists, environmental scientists and public health workers.

Soil degradation has serious global impacts on agronomic, economic, and sociopolitical conditions, however, statistics regarding the degree of these impacts has been largely unreliable. This book aims to standardize the methodology for obtaining reliable and objective data on soil degradation. It will also identify and develop criteria for assessing the severity of soil degradation, providing a realistic scenario of the problem.

Much attention has been given to above ground biomass and its potential as a carbon sink, but in a mature forest ecosystem 40 to 60 percent of the stored carbon is below ground. As increasing numbers of forests are managed in a wide diversity of climates and soils, the importance of forest soils as a potential carbon sink grows.The Potential of U.S. Forest Soils to Sequester Carbon and Mitigate the Greenhouse Effect provides researchers and policy makers with an understanding of soil processes and their relation to carbon dynamics, as well as strategies to monitor and techniques to measure forest soil carbon. It covers the effects of management on soils in a wide range of forest ecosystems together with policy options that are effective and benefit both the forest community and the over all environment. This valuable reference provides forest managers, urban planners, land owners, policy makers, and the general public with guidance that will allow for a holistic approach to land management, environmental quality, and improved forest productivity.

The most complete, nonpartisan source of information on this hot agronomic topic available today, this book brings together a diverse group of papers and data to resolve the debate between sedimentologists and soil scientists and agronomists over whether the effects of soil erosion on carbon and atmospheric CO2 is beneficial or destructive. Divided into four sections, it offers data on how soil erosion affects soil, water, and air quality. Topics include mineralization rate, inundation, sediment deposition, and global warming potential, as well as carbon dioxide, methane, and nitrous oxide emissions, and the implications of soil erosion on the global carbon cycle and carbon budget.

Addressing a topic of major importance to the maintenance of world food supplies, this reference identifies knowledge gaps, defines priorities, and formulates recommendations for the improvement of the rice-wheat farming system. The book reveals new systems of rice intensification and management and illustrates the application of no-till and conservation farming to the rice-wheat system. With contributions from 65 international experts, and case studies from India, Nepal, Pakistan, and Bangladesh, Sustainable Agriculture and the International Rice-Wheat System focuses on seeding equipment and residue management, weed control, water and nutrient efficiency, and integrated pest management.

Soil Degradation in the United States: Extent, Severity, and Trends examines the magnitude and severity of soil degradation by different processes in the U.S., including water erosion, wind erosion, C depletion, soil compaction, salt build-up, and soil contamination. In addition, it addresses policy issues with regard to economic and environmental impact, land use change, and global trends. It covers past trends and future projections regarding soil degradation. The book provides a ready reference and data source for soil scientists and researchers, agronomists, environmentalists, land use planners, land managers, and policy makers.

Can developing countries meet the food requirements of their growing populations without jeopardizing a natural resource base that is already under great stress?Can increases in food production achieved in the past two decades be sustained in the next two decades?Can developing countries achieve freedom from hunger and malnutrition for their entire populations?How can food security be reconciled with environment quality in an industrializing society?Leading authorities, from soil scientists to economists, address these critical questions in Food Security and Environmental Quality in the Developing World. With a focus on India, this book reviews the state of natural resources, fertilizer and energy needs, and the potential importance of biotechnology as they affect all developing countries. It then addresses issues pertaining to water quality, agricultural chemicals, and pesticide residues on food. Part Three examines water harvesting, post-harvest food losses, storage and processing of animal products, and sustainability and inequality issues. The next sections deal with poverty alleviation, microfinance, gender equity, policy issues, and the role of the public sector. Finally, the book considers emerging issues and priorities.Developing countries have achieved an impressive increase in total food production over the past two decades, but at a high cost to environmental quality. As the populations of these countries continue to grow, soil degradation, pollution and contamination of natural waters, deteriorating air quality, and growing dependence on expensive and diminishing fossil fuels become increasing concerns. Food Security and Environmental Quality in the Developing World takes on the crucial challenge of enhancing agricultural production while reversing the alarming trends in soil and environmental degradation.

The potential to mitigate greenhouse gas emissions and global climate change is one factor driving agricultural policy development of programs that might pay farmers for practices with a high potential to sequester carbon. With chapters by economists, policy makers, farmers, land managers, energy company representatives, and soil scientists, Agricultural Practices and Policies for Carbon Sequestration in Soil explores a broad range of topics. It examines topics such as the effects of soil tillage and mulch rate, soil monitoring and assessment, soil fertility management, policy options, and the economic issues associated with carbon sequestration.This volume caps a "series" of books from leading researchers on carbon sequestration in soils by integrating the science with the economic and policy issues surrounding it. It provides agricultural scientists, farmers, and policy makers with innovative and environmentally friendly practices for improved land management and crop production. Agricultural Practices and Policies for Carbon Sequestration in Soil helps to identify strategies that can lead to widespread adoption of management practices that will enhance productivity, the soil carbon pool, and the overall environment.

Soil organic matter (SOM) is the primary determinant of soil functionality. Soil organic carbon (SOC) accounts for 50% of the SOM content, accompanied by nitrogen, phosphorus, and a range of macro and micro elements. As a dynamic component, SOM is a source of numerous ecosystem services critical to human well-being and nature conservancy. Important among these goods and services generated by SOM include moderation of climate as a source or sink of atmospheric CO2 and other greenhouse gases, storage and purification of water, a source of energy and habitat for biota (macro, meso, and micro-organisms), a medium for plant growth, cycling of elements (N, P, S, etc.), and generation of net primary productivity (NPP). The quality and quantity of NPP has direct impacts on the food and nutritional security of the growing and increasingly affluent human population.Soils of agroecosystems are depleted of their SOC reserves in comparison with those of natural ecosystems. The magnitude of depletion depends on land use and the type and severity of degradation. Soils prone to accelerated erosion can be strongly depleted of their SOC reserves, especially those in the surface layer. Therefore, conservation through restorative land use and adoption of recommended management practices to create a positive soil-ecosystem carbon budget can increase carbon stock and soil health.This volume of Advances in Soil Sciences aims to accomplish the following:Present impacts of land use and soil management on SOC dynamicsDiscuss effects of SOC levels on agronomic productivity and use efficiency of inputsDetail potential of soil management on the rate and cumulative amount of carbon sequestration in relation to land use and soil/crop managementDeliberate the cause-effect relationship between SOC content and provisioning of some ecosystem servicesRelate soil organic carbon stock to soil properties and processesEstablish the relationship between soil organic carbon stock with land and climateIdentify controls of making soil organic carbon stock as a source or sink of CO2 Connect soil organic carbon and carbon sequestration for climate mitigation and adaptation

This book brings together current knowledge of terrestrial C sequestration in Central Asia. The themes treated include: biophysical environments, water resources, sustainable agriculture, soil degradation, the effects of irrigation schemes on secondary salinization, soil management and its relationship to carbon dynamics; the relationship between forest management and carbon dynamics, economic analyses of land use practices, important methodological issues arising from the use of GIS, remote sensing, carbon budgeting and scaling, and a review of the knowledge gaps in carbon and climate change. The book is a reference source for soil, water, vegetation, climate, land use and management in the region. The book will be of interest to a wide variety of environmental scientists, economists and those interested in policy issues for the sustainable management of natural resources.

Challenges and Solutions of Climate Impact on Agriculture explores issues arising from the changing climate for agricultural plants, with a soil-focused approach. Addressing the impacts on a range of important global food crops, it looks at issues of water and temperature and their impact on soil quality for production.Presented by a global team of experts, this book will be important for researchers seeking to understand specific challenges, and means of addressing those challenges effectively and efficiently.The agriculture sector is arguably one of the most sensitive to changes in the climate. Because the climate of a region determines the nature and characteristics of vegetation and crops, any change in the mean seasonal temperature and decrease in effective precipitation can reduce productive periods for crops, risking outbreaks of pests and disease and negatively affecting global food security.

Explains the impact of climate change on soil properties, productivity, and microbial diversityProvides detailed information regarding the impact of climate change on yields of cereal grains and other cropsEnables agricultural scientists to design policies and management strategies for sustainable agriculture

In order to feed their burgeoning populations, developing nations will need to double cereal production by the year 2050. This increase will have to come from existing land, as little potential exists for bringing new land under cultivation -- a daunting prospect when one realizes that increased use and significantly higher concentrations of carbon dioxide have led to a severe depletion of the carbon pool in the world's soils. This is especially telling in developing countries where tropical climates further compromise the soil's ability to recover.In Climate Change and Global Food Security, bestselling editor Rattan Lal heads up a team of the world's top soil scientists and ecologists to document the history of this impending agricultural crisis and explore possible solutions. Throughout this timely text, the authors address six complex themes:1. The impact of projected climate change on soil quality, water resources, temperature regime, and growing season duration on net primary productivity of different biomes2. Soil carbon dynamics under changing climate3. The impact of changes in carbon dioxide and ecological environments on agronomic yields and food production in different regions of the world4. World food demands and supply during the 21st century5. Policy and economic issues related to carbon trading and enhancing agricultural production6. Research and development priorities for enhancing soil carbon pool and food securityThis hard-hitting text is essential reading for anyone involved with soil and crop sciences as well as policy makers and change agents who need to come to the forefront of this issue armed with the latest information and viable solutions.

Principles of Soil Physics examines the impact of the physical, mechanical, and hydrological properties and processes of soil on agricultural production, the environment, and sustainable use of natural resources. The text incorporates valuable assessment methods, graphs, problem sets, and tables from recent studies performed around the globe and offers an abundance of tables, photographs, and easy-to-follow equations in every chapter.The book discusses the consequences of soil degradation, such as erosion, inhibited root development, and poor aeration. It begins by defining soil physics, soil mechanics, textural properties, and packing arrangements . The text continues to discuss the theoretical and practical aspects of soil structure and explain the significance and measurement of bulk density, porosity, and compaction.The authors proceed to clarify soil hydrology topics including hydrologic cycle, water movement, infiltration, modeling, soil evaporation, and solute transport processes. They address the impact of soil temperature on crop growth, soil aeration, and the processes that lead to the emission of greenhouse gases. The final chapters examine the physical properties of gravelly soils and water movement in frozen, saline, and water-repellant soils.Reader-friendly and up-to-date, Principles of Soil Physics provides unparalleled coverage of issues related to soil physics, structure, hydrology, aeration, temperature, and analysis and presents practical techniques for maintaining soil quality to ultimately preserve its sustainability.

Addressing a topic of major importance to the maintenance of world food supplies, this reference identifies knowledge gaps, defines priorities, and formulates recommendations for the improvement of the rice-wheat farming system. The book reveals new systems of rice intensification and management and illustrates the application of no-till and conservation farming to the rice-wheat system. With contributions from 65 international experts, and case studies from India, Nepal, Pakistan, and Bangladesh, Sustainable Agriculture and the International Rice-Wheat System focuses on seeding equipment and residue management, weed control, water and nutrient efficiency, and integrated pest management.

Focusing on the technical, social, and economic issues involved in watershed management, this interdisciplinary author team focuses on bettering land use practices and the condition of soil water resources.Integrated Watershed Management in the Global Ecosystem is a volume composed from an international symposium of the world's leading experts and practitioners in soil and water conservation exploring an "ecosystem-based" management approach to the problem.Readers of this volume will quickly appreciate why inattention to the issues of continued land and water degradation stresses human populations. This volume seeks positive results through better understanding of the issues and improved management approaches.This volume is useful to soil scientists, horticulturists, forestry researchers, environmental scientists and social scientists.

Featuring contributions from leading experts in the field, Climate Change and Managed Ecosystems examines the effects of global climate change on intensively constructed or reconstructed ecosystems, focusing on land use changes in relation to forestry, agriculture, and wetlands including peatlands. The book begins by discussing the fragility of ecosystems in the face of changing climates, particularly through human caused increases in atmospheric GHGs. The chapters delineate how and why the climate has changed and what can be expected to occur in the foreseeable future. They identify the potential adaptation responses to reduce the impacts of a changing climate.Using this information as a foundation, the chapter authors examine what is known about the impacts of climate on agricultural, forested, and wetland ecosystems. They illustrate the importance of these ecosystems in the global carbon cycle and discuss the potential interaction between terrestrial and atmospheric carbon pools under changing climactic conditions. The book delineates what needs to be done to ensure continued stability in these ecosystems. It includes a description of activities that have been undertaken in the past to identify gaps in understanding GHG emissions from agriculture, forests, and wetlands and their mitigation, as well as current research initiatives to address these gaps.The book presents an overview of how economic reasoning can be applied to climate change and illustrates how terrestrial carbon-uptake credits (offset credits) operate within the Kyoto Protocol framework. By identifying gaps in the current understanding of adaptation of mitigation strategies, the book underscores the need to make management of these ecosystems part of a global solution.

World soils contain about 1500 gigatons of organic carbon. This large carbon reserve can increase atmospheric concentrations of CO2 by soil misuse or mismanagement, or it can reverse the 'greenhouse' effect by judicious land use and proper soil management.Soil Processes and the Carbon Cycle describes soil processes and their effects on the global carbon cycle while relating soil properties to soil quality and potential and actual carbon reserves in the soil. In addition, this book deals with modeling the carbon cycle in soil, and with methods of soil carbon determinations.

Soil degradation has serious global impacts on agronomic, economic, and sociopolitical conditions, however, statistics regarding the degree of these impacts has been largely unreliable. This book aims to standardize the methodology for obtaining reliable and objective data on soil degradation. It will also identify and develop criteria for assessing the severity of soil degradation, providing a realistic scenario of the problem.

Soil degradation is a widespread problem in Africa resulting in decreased agricultural productivity while demand for food continues to increase. Degradation is caused by accelerated erosion, acidification, contamination, depletion of soil organic matter and plant nutrients, and salinization. The major cause of soil degradation in Africa is uncontrolled and excessive grazing in the savanna regions followed by deforestation and the use of inappropriate and extractive farming practices. Perpetual neglect of the health of soils in Africa can exacerbate the already serious problems of food and nutritional insecurity and environmental degradation. Food and nutritional security of the growing population of Africa can only be achieved if degraded soils are restored and soils of agroecosystems are managed prudently and sustainably. Ignoring soils and taking the fragile, finite and precious soil resources for granted is the principal cause of poverty, hunger, and environmental degradation. The downward spiral must be reversed through soil restoration measures based on translating science into action. This book describes the soils of Africa, processes of soil degradation, extent and severity of soil degradation, and the impacts of degradation processes on food and nutritional security.Features:Explores the extent and severity of soil degradation in AfricaAnalyzes the cause–effect relationship between anthropogenic activities and soil degradationReviews processes of soil degradation in Africa including erosion, salinization, nutrient depletion, and decline of soil organic matterAddresses the effect of climate change on soil degradation in Africa.Explains how soil degradation causes food and nutritional insecurity Part of the Advances in Soil Sciences series, this volume is specifically devoted to the processes and factors that cause soil degradation and the challenges and potential for remediation and restoration of soil health in Africa.

Climate is a soil-forming factor and soil can mitigate climate change through a reduction in the emissions of greenhouse gases and sequestration of atmospheric CO2. Thus, there is a growing interest in soil management practices capable of mitigating climate change and enhancing environmental quality. Soil and Climate addresses global issues through soil management and outlines strategies for advancing Sustainable Development Goals (SDGs). This volume in the Advances in Soil Science series is specifically devoted to describe state-of-the-knowledge regarding the climate–soil nexus in relation to: Soil Processes: weathering, decomposition of organic matter, erosion, leaching, salinization, biochemical, transformations, gaseous flux, and elemental cycling, Soil Properties: physical, chemical, biological, and ecological, Atmospheric Chemistry: gaseous concentrations of (CO2, CH4, N2O), water vapors, soot, dust, and particulate matter, Mitigation and Adaptation: source and sink of GHGs (CO2, CH4, N2O), land use and soil management, soil C sink capacity, permafrost, Soil Management: sequestration of organic and inorganic C, nutrient requirements, water demands, coupled cycling of H2O, N, P, S, and Policy and Outreach: carbon farming, payments for ecosystem services, COP21, SDGs, land degradation neutrality Special topics on soil as a source or sink of CO2, silicate weathering and carbon sequestration, nutrients required for carbon sequestration, physical protection and the mean resident time, and predicting soil carbon stocks are discussed in detail throughout the book.

Nitrogen (N) is potentially one of the most complex elements on the Earth. It is necessary for all biological activity, but creates negative impacts on water and air quality. There is a balancing act between deficiency and surplus and the forms of N available further complicate our understanding of the dynamics. Biological fixation provides some plants with N supply while others are totally dependent upon N being available in the soil profile for the roots to extract. Nevertheless, the demand for N will increase because the human population with its increasing growth requires more protein and thus more N. Understanding the global N cycle is imperative to meeting current and future nitrogen demands while decreasing environmental impacts. This book discusses availability, production, and recycling of N in air, water, plants, and soils. It features information on N impacts to soil and water quality, management of N in agroecosystems, and techniques to maximize the use efficiency while minimizing the risks of leakage of reactive N into the environment. This volume in the Advances in Soil Science series is specifically devoted to availability, production, and recycling of N with impact on climate change and water quality, and management of N in agroecosystems in the context of maximizing the use efficiency and minimizing the risks of leakage of reactive N (NO-3, N¬2O) into the environment.

Globally, 30% of the world population lived in urban areas in 1950, 54% in 2016 and 66% projected by 2050. The most urbanized regions include North America, Latin America, and Europe. Urban encroachment depletes soil carbon and the aboveground biomass carbon pools, enhancing the flux of carbon from soil and vegetation into the atmosphere. Thus, urbanization has exacerbated ecological and environmental problems. Urban soils are composed of geological material that has been drastically disturbed by anthropogenic activities and compromised their role in the production of food, aesthetics of residential areas, and pollutant dynamics. Properties of urban soils are normally not favorable to plant growth—the soils are contaminated by heavy metals and are compacted and sealed. Therefore, the quality of urban soils must be restored to make use of this valuable resource for delivery of essential ecosystem services (e.g., food, water and air quality, carbon sequestration, temperature moderation, biodiversity). Part of the Advances in Soil Sciences Series, Urban Soils explains properties of urban soils; assesses the effects of urbanization on the cycling of carbon, nitrogen, and water and the impacts of management of urban soils, soil restoration, urban agriculture, and food security; evaluates ecosystem services provisioned by urban soils, and describes synthetic and artificial soils.