“Historical Ecology and Future Explorations” in “Amazonian Dark Earths: origin, properties, and management” [2] by J. Lehmann, N. Kaampf, W.I. Woods, W. Sombroek, D.C. Kern, T.J.F. Cunha et al., Chapter 23, 2003. (Clark Erickson), pp. 484
[1] “Discovery and awareness of anthropogenic amazonian dark earths (terra preta)”, by William M. Denevan, University of Wisconsin–Madison, and William I. Woods, University of Kansas.
