Advances in Agronomy

Chapter One: Root Iron Plaque on Wetland Plants as a Dynamic Pool of Nutrients and Contaminants

• Abstract
• 1. Introduction
• 2. Wetlands and Hydrophytes
• 3. Formation and Characteristics of Iron Plaque
• 4. Root Plaque as a Source and Sink for Plant Nutrients and Contaminants
• 5. Future Research
• 6. Summary
• 7. Conclusions
• Acknowledgements

Chapter Two: Utilization of Biowaste for Mine Spoil Rehabilitation

• Abstract
• List of abbreviations
• 1. Introduction
• 2. Sources of Biowaste
• 3. Regulations of Biowaste Utilization
• 4. Effects of Biowaste Addition on Mine Spoils
• 5. Case Studies of Biowaste Utilization
• 6. Efficacy of Biowastes on Mine Spoil Rehabilitation
• 7. Conclusions and Future Research Needs
• Acknowledgments

Chapter Three: Exposure, Toxicity, Health Impacts, and Bioavailability of Heavy Metal Mixtures

• Abstract
• 1. Introduction
• 2. Impacts of Heavy Metals on Human Health and Metal–Metal Interactions
• 3. Impacts on Ecosystem Health
• 4. Regulatory Limits for Heavy Metals
• 5. Bioassay Tests
• 6. Metal–Metal Interactions in Soil
• 7. Effect of Soil Properties on Metal Bioavailability
• 8. Conclusions
• Acknowledgments

Chapter Four: Integrated Farming Systems and the Livelihood Security of Small and Marginal Farmers in India and Other Developing Countries

• Abstract
• 1. Introduction
• 2. Background
• 3. Concepts of Farming Systems
• 4. Determinants of Farming Systems
• 5. Major Components of IFS in India and Other South Asian Countries
• 6. Conclusions