[Terrapreta] Long term effects of charcoal

[Michael Bailes]

Johannes Lehman says that there are 6,000 YO Terra preta soils.
These don't have pottery artifacts;
 only stone age artifacts as they had not invented pottery!!!!
mb

On 08/05/07, Allan Balliett <aballiett at frontiernet.net> wrote:
>
> >It still seems pretty incredible that we can have 6,000 YO fertile
> >soils in the tropics.
> >Obviously something else is going on
> >MB
>
> Michael - Isn't part of this 6000 YO figure attributed to the age of
> the 'trees' used in the char? I think that is the case: there is no
> way to differentiate between the age of the biomass itself and age of
> the char. Of course, the life of a tree ain't going to knock too big
> of a dent in 6000 years, but I had to say it. ;-)
>



-- 
Michael Bailes.
"Human beings,
who are almost unique in having the ability to learn from the experience of
others,
are also remarkable for their apparent disinclination to do so."
Douglas Adams, "Last Chance to See"
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