[Terrapreta] charcoal decomposition in soil

[Gerald Van Koeverden]

Why aren't we knee-deep in charcoal...?

"This organic material accounts for up to half of the composition of  
soils. It is extremely resistant to chemicals. 'So far, examinations  
have only covered three to four years. During this period, black  
carbon is not decomposed at all,' Schmidt explains. 'But if nothing  
were to happen to it in the long run, we would be wading knee-deep in  
charcoal.'"

http://www.portailderecherche.ch/unizh/p2880.htm

gerald
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