Edited by Yong Sik Ok, professor and director, Korea Biochar Research Center, Department of Biological Environment, Kangwon National University, Chuncheaon, Korea Sophie M. Uchimiya, research chemist, U.S. Department of Agriculture-Agricultural Research Service (USDAARS), Southern Regional ResearchCenter in New Orleans, Louisiana Scott X. Chang, professor in forest soils and nutrient dynamics, University of Alberta, Edmonton, Canada Nanthi Bolan, professor of environmental science, University of Newcastle, Australia