Introduction
The Amazon, one of the richest and most biodiverse ecosystems on the planet, faces significant challenges due to deforestation and environmental degradation. However, an ancestral soil created centuries ago by Amazonian indigenous populations may hold the key to accelerating the recovery of degraded areas and transforming the way ecological restoration is viewed in Brazil.
The Power of Amazonian Dark Earth
A study conducted by researchers from the Center for Nuclear Energy in Agriculture at the University of São Paulo (Cena-USP), the Embrapa Amazon Western, and the National Institute for Amazonian Research (Inpa) showed that small amounts of Amazonian Dark Earth (ADE) were able to significantly increase the growth of native tree species in real field conditions.
The results, published in January 2026, drew the attention of experts, particularly in the case of the purple ipê (Handroanthus avellanedae), a species found in both the Amazon and the Atlantic Forest. In just 180 days, seedlings grown with small amounts of ADE showed growth up to 55% greater in height and 88% in trunk diameter compared to plants grown without the anthropogenic soil.
Benefits for Forest Restoration
Beyond the purple ipê, another Amazonian species, such as the paricá (Schizolobium amazonicum), also showed significant results. On average, these plants grew 20% more and had a 15% larger trunk diameter.
These findings reinforce the scientific potential of Amazonian Dark Earth, also known as “Indian black earth”, to boost forest restoration. The use of this earth can be a valuable tool to accelerate the recovery of degraded areas and promote biodiversity.
Conclusion
Amazonian Dark Earth is an ancestral soil with unique properties that can be used to boost forest restoration. With the help of this earth, it is possible to accelerate the recovery of degraded areas and promote biodiversity.
Source / Reference: Mongabay