[Terrapreta] Locations of TP soils sites in the Amazon.

[Kevin Chisholm]

Dear Lou

lou gold wrote:
> No need to ask because the terra preta site has a marvelous search 
> tool. I highly recommend it.
>
> http://terrapreta.bioenergylists.org/search/node/terra+preta+maps
>
> And the maps are great too!
Yes, it is a very good site. It led me to another very good site:

http://www.gerhardbechtold.com/TP/gbtp.php?vers=2

It is difficult to determine the extent of terra preta, and to determine 
which "black earth deposits" have been determined as being "Terra 
Preta", and which "black earth deposits" are not Terra Preta. More 
specifically, which "Terra Preta Deposits" are man-made, and which are 
natural Dark Earth soils cultivated by the natives?

It is interesting indeed that the title of Dr. Bechtold's Thesis is 
"Thesis about Anthrohumox in Brazilian Lowland." One would expect to 
find natural bogs and swamps in lowland areas, and accordingly, one 
would expect to find "black earth soils" in these areas.

Here is an interesting question for you... under what circumstances does 
a "cultivated soil" become a "man made soil"? There are places all over 
the World where fertilizer, minerals, compost, nutrients, etc, have been 
applied to soils for generations, centuries, and millenniums, yet these 
soils are not termed "Man Made Soils".  If I simply add charcoal to 
soil, does it become a "Man Made Soil"?

Best wishes,

Kevin

>
> hugs,
>
> lou
>
>
> On Thu, May 29, 2008 at 2:13 AM, Kurt Treutlein <rukurt at westnet.com.au 
> <mailto:rukurt at westnet.com.au>> wrote:
>
>     Sean K. Barry wrote:
>     > Hi Kevin,
>     <<snipped>
>     >  The soils are mostly clays; Aluminum oxides, Acrisols, Oxisols,
>     > Ferrasols, and Aridisols (<-Lord protect me from my critics, if
>     I got
>     > any of those soil topological names wrong).
>     >
>     > Typos are my damned fault ... and not my damned fault, Kurt! Smiley
>     > emoticon
>     >
>     No, you're actually doing well here, you seem to know a lot about
>     Terrapreta.
>     Its gasification chemistry where you're weak.
>
>     Keep up the good wotk :)
>
>     Kurt
>
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