Terra Preta and Pyrogenic Carbon
Amazonian Dark Earths (Terra Preta) are the cultural and historical inspiration for modern biochar research: anthropogenic soils enriched with pyrogenic carbon that remain fertile centuries after formation.
Foundational citation
Glaser et al. (2001). The ‘Terra Preta’ phenomenon: a model for sustainable agriculture in the humid tropics. Naturwissenschaften 88:37–41. DOI: 10.1007/s001140000193. ~1,145 citations (Semantic Scholar, 2026-09-14).
This historical analog underpins the idea that intentionally produced pyrogenic carbon can improve tropical soils and store carbon for long periods—later formalized in Lehmann (2006/2007) and modern CDR literature (see Foundational Papers).