Advances in Agronomy

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. Photosynthetic Acclimation and Elevated [CO2] Induced Nitrogen Deficiency: Two Related Phenomena that Limit Positive Plant Responses to Elevated [CO2] Moshe Halpern, Uri Yermiyahu and Asher Bar-Tal 2. Progress in Genetic Studies of Traits Related to the Nutritional Value of Wheat Fang Li, Ahui Zhao, Chao Cui, Jian Dong, Xiang Gao, Sachin Rustgi and Mingming Yang 3. Calcium Carbonate Minerals as Scavengers of Metals and Radionuclides for Natural Attenuation and Remediation Nikolla P. Qafoku, Amanda R. Lawter, Elizabeth C. Gillispie, Erin McElroy, Frances N. Smith, Rahul Sahajpal, Kirk Cantrell and Vicky Freedman 4. Perspectives on Soil Series Classification Based on Comparison of Two Contrasting Scenarios M. C. Laker and G. P. Nortje 5. Nonadditive Gene Expression and Epigenetic Changes in Polyploid Plants and Crops Zhi Li and Z. Jeffrey Chen 6. Impact of Soil-Water Contaminants on Tropical Agriculture, Animal and Societal Environment Avijit Ghosh, Madhab Chandra Manna, Shankar Jha, Amit K. Singh, Sukanya Misra, Ramesh Chandra Srivastava, Prem Prakash Srivastava, Ranjan Laik, Ranjan Bhattacharyya, S. S. Prasad, S. P. Singh, Santosh Singh, Bipin Kumar, Sanjay Tiwari and Ashok Singh