Amazonian dark earth (ADE), a soil engineered by ancient populations, boosts tree growth dramatically in Brazilian Amazonas. Pink trumpet trees grew 88% wider and 55% taller with minimal ADE application.
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Soil fertilization with Amazonian dark earth increases tree diameter by up to 88%
88% % Tree diameter increase
55% % Tree height increase
Anthropogenic (Ancient-Made) Source soil type
Amazonas State, Brazil Study location