Photo B. Liang, Cornell University. A layer of rich, black terra preta lies atop a layer of light brown, nutrient-poor rainforest soil near Manaus, Brazil.
Also see:
Best practice for biochar (Nature News, June 2, 2009
There's more carbon in the soil than in the wood
By Ben van Raaij, de Volkskrant, March 14, 2009 (in Dutch)
Charcoal: Out of the Grill and into the Ground (June 5, 2008)
Attention, here's another wonderful remedy!
Door Paul Luttikhuis, April 8, 2009 (in Dutch)
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