[Terrapreta] Pure Organics Vs. Biological Agriculture

[David Yarrow]

try reading johannes lehmann, christoph steiner, bruno glaser, makato ogawa, 
wim sombroek, william woods...  lots of data already exists documenting the 
history and productivity of terra preta.

----- Original Message ----- 
From: "Kevin Chisholm" <kchisholm at ca.inter.net>

> Would you have any test results you could refer us to, to support these 
> statements?