Soil Organic Matter Management: The Roles of Residue Quality in C Sequestration and N Supply - Sustainable Management of Soil Organic Matter - page 185

Fig. 3.11.2. Scanning electron micrograph and energy dispersive X-ray spectra of the clay
fraction of a Terra Preta. 5; Particulate black carbon greater than clay size. 6; Aggregated
organomineral complexes.

Fig. 3.11.3. Black carbon in density fractions.