[NAFEX] soil solarizaton

Mark Lee markl at nytec.com
Tue Mar 23 15:13:55 EST 2004

Good idea about the fresnel lens.  I know that people use propane
torches (eg Red Dragon) to control weeds without herbicides.  I can see
the fresnel lens accomplishing the same with free solar energy.  As a
kid, I used to melt lead with my giant lens.  To anyone going to
experiment with this... use the same caution you would with weed torches
and wear extra dark glasses.
-Mark Lee, Seattle

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