@article{article3bbe70f8, title = {Black carbon increases cation exchange capacity in soils}, author = {Liang, Biqing and Lehmann, Johannes and Solomon, Dawit and Kinyangi, James and Grossman, J and O'Neill, B and Skjemstad, Jan O. and Thies, James B and Luizao, Flavio Jesus and Peterson, James A. and Neves, Eduardo Góes}, year = {2006}, journal = {Soil Science Society of America Journal} }