DONALD L. SPARKS is the Unidel S. Hallock du Pont Chair and Francis Alison Professor at the University of Delaware. He is internationally recognized for his research in the areas of kinetics of biogeochemical processes and surface chemistry of natural materials. His research has focused on fate and transport of trace metals in soil and water, soil remediation, water quality, and carbon sequestration in soils. Dr. Sparks is the author of two previous editions of Environmental Soil Chemistry and more than 350 refereed papers and book chapters. He is fellow of five scientific societies, and he has been the recipient of major awards and lectureships including the Geochemistry Medal from the American Chemical Society, the Liebig Medal from the International Union of Soil Sciences, the Einstein Professorship from the Chinese Academy of Sciences and the Philippe Duchaufour Medal from the European Geosciences Union. Dr. Sparks served as president of the Soil Science Society of America and the International Union of Soil Sciences, has served on advisory committees for several national laboratories and national and international centers and institutes, and served as chair of the U.S. National Academy of Sciences (NAS) Committee for Soil Sciences and other NAS Committees.

• 1. Advances in Understanding Soil/Plant Interfacial Processes2. Dynamics of Soil Formation3. Extraterrestrial Exploration: Expanding Our Horizons4. The Second Genetic Code5. Microbial Distribution in Soils: Physics and Scaling6. Advances in Geobiology7. Ecological Genomics 8. Sorghum Drought Tolerance and Striga Resistance9. Environmental Nanoparticles10. Combining Biomarker With Stable Isotope Analyses for Assessing the Transformation and Turnover of Soil Organic Matter