Pan Ming Huang, PhD, FAAAS, FASA, FCSSS is Professor Emeritus of Soil Science at the University of Saskatchewan in Saskatoon, Canada. Dr. Huang has authored over 300 refereed articles and book chapters, written two books, edited seventeen others, and served on many editorial boards. He received the Distinguished Researcher Award from the University of Saskatchewan and the Soil Science Research Award from the Soil Science Society of America.

Nicola Senesi is Professor of Soil Chemistry and Head of the Department of Agroforestal and Environmental Biology and Chemistry of the University of Bari, Italy, where he has been actively involved in research and teaching since 1969. He has taught courses in Soil Chemistry, Soil Science, Agricultural Chemistry, Wood Chemistry and technology, Organic Chemistry, Wood Chemistry and Technology, Organic Chemistry, and General and Inorganic Chemistry. He has been a visiting professor and/or scientist for various periods at universities in Canada, USA, Somalia, Indonesia, Switzerland, Argentina, Brasil, Venezuela and Colombia. Dr. Senesi is a Fellow of the American Society of Agronomy - ASA - since 1995 and the Soil Science Society of America - SSSA - since 1996, and received the Gold Medal of the Polish Soil Science Society in 1994. He was conferred with a Doctorate Honoris Causa by the Institute National Polytechnique de Toulouse - INPT -, France, in 2000. Dr. Senesi is currently President of Division VI: Chemistry and the Environment and Chair of the Subcommittee on Biophysics-Chemical Processes in Environmental Systems of IUPAC, President of MESAEP, and Vice-President of the Italian Soil Science Society - SISS -, and was President of the International Humic Substances Society - IHSS - and Chairman of Division II-Soil Properties and Processes of the International Union of Soil Science - IUSS -. He is currently an Associate Editor of Geoderma, Soil Science, Pedosphere, Pure and Applied Chemistry and CLEAN-Soil, Air, Water. Dr. Senesi's research is focused on fundamental and applied aspects of the chemistry and biochemistry of organic matter from soils and other systems and materials, and its interactions with soil-applied organic chemicals and trace metals, by the use of advanced physico-chemical techniques and biochemical tools.