Unverified50% confidenceFactExact time

The total area of Amazonian Dark Earth plots discovered to date is estimated to be between 6,000 and 18,000 square kilometers, with some plots exceeding two meters in depth.

1

Sources

50%

Confidence

Long-term

Relevance

8/9/2026

First Seen

Sources

亚马逊失落文明：3%雨林面积曾养活300万人口

Related Claims

UnverifiedModern soil science research has found that the carbon content of Amazonian Dark Earth is more than 70 times that of surrounding natural soils, its phosphorus content is hundreds of times higher, and its fertility can persist for thousands of years without human maintenance.62% similar

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