Dr. Gaspar H. Korndörfer is Professor of Soil Science and Plant Nutrition, Federal University of Uberlândia, Brazil. Since 1994 he has been studying the role of silicon fertilization for sugarcane, rice and pasture in Brazil and Florida, USA. His interests have included silicon plant responses, evaluation of potential silicon sources, soil testing for plant-available silicon, and the influence of silicon on plant tolerance to water stress. Dr. Korndörfer is also a CNPq Scholar and teaches "Use of Fertilizer and Residues in Agriculture" to graduate students.