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.

• Wetland Restoration and Creation for Nitrogen Removal: Challenges to Developing a Watershed-Scale Approach in the Chesapeake Bay Coastal PlainMargaret A. Goldman and Brian A. NeedelmanNitrogenous Gas Emissions from Soils and Greenhouse Gas EffectsEd Gregorich, H. Henry Janzen, Bobbi Helgason and Ben EllertHydrological Aspects of Arsenic Contamination of Groundwater in Eastern IndiaSaugata DattaSoil Spectroscopy: An Alternative to Wet Chemistry for Soil MonitoringMarco Nocita, Antoine Stevens, Bas van Wesemael, Matt Aitkenhead, Martin Bachmann, Bernard Barthès, Eyal Ben Dor, David. J. Brown, Michael Clairotte, Adam Csorba, Pierre Dardenne, Jose A.M. Demattê, Valerie Genot, Cesar Guerrero, Maria Knadel, Luca Montanarella, Carole Noon, Leonardo Ramirez-Lopez, Jean Robertson, Hiro Sakai, Jose M. Soriano-Disla, Keith D. Shepherd, Bo Stenberg, Erick K. Towett, Ronald Vargas and Johanna WetterlindOccurrence, Detection and Molecular and Metabolic Characterization of Heat-Resistant Fungi in Soils and Plants and Their Risk to Human HealthMagdalena Frąc, Stefania Jezierska-Tys and Takashi Yaguchi