1. Designing Intercrops for High Yield, Yield Stability and Efficient Use of Resources: Are There Principles? TjeerdJan Stomph, Christos Dordas, Alain Baranger, Laurent Bedoussac, Joshua de Rijk, Bei Dong, Jochem Evers, Chunfeng Gu, Long Li, Johan Simon, Erik Steen Jensen, Qi Wang, Yuyun Wang, Zishen Wang, Huasen Xu, Chaochun Zhang, Lizhen Zhang, Wei-Ping Zhang and Wopke van der Werf 2. The Chemical Nature of Soil Organic Phosphorus - A Critical Review and Global Compilation of Quantitative Data Timothy L. McLaren, Ronald J. Smernik, Michael J. McLaughlin, Ashlea L. Doolette, Alan E. Richardson and Emmanuel Frossard 3. Soil Horizon Variation - A Review A. E. Hartemink, Y. Zhang, J. G. Bockheim, N. Curi, S. H. G. Silva, J. Grauer-Gray, D. J. Lowe, P. Krasilnikov 4. Tracing the Dynamics of Animal Excreta N in the Soil-plant-atmosphere Continuum using 15N Enrichment Phillip M. Chalk, Caio T. Inacio and Deli Chen 5. A Review of Copper Speciation and Transformation in Plant and Soil/Wetland Systems Peiman Zandi, Jianjun Yang, Katarzyna Mozdzen and Beata Barabasz-Krasny 6. A Biogeochemical View of the World Reference Base Soil Classification System. Homage to Ward Chesworth Felipe Macias Vazquez, Marta Camps-Arbestain
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.