Is there a soil expert on the list?  I have a hard time believing that are only source for
lateritic soils is Dupla!  Aren't there any regions in the US where these or similar soils
can be found?  Has anyone ever contacted local universities to see if they can find local
information?  If I can find a soil that is low in organics and high in desirable elements, I
would be willing to go collecting.  

I am especially interested in soils near Dallas.  Any ideas?

Eric Schoville
eschovil at us_oracle.com