| We've seen talks of measuring soil conductivity on this and the LF lists.  
There is a guy in my church who does a lot of mission work in Africa and runs a 
small ag mfg business.  Also a company building soil measurements for basically 
ag use:  Veris Technology.  A quick chat today:
Supposedly in some parts of the Congo have highly non-conductive soils, hot dry 
weather, etc.  Can build up major charges at times that people walking across 
the rocks occasionally get fatal discharges.  Pretty hostile places.
N0UU
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