To: "'North American Fruit Explorers'" <nafex@lists.ibiblio.org>
Subject: RE: [NAFEX] soil solarizaton
Date: Tue, 23 Mar 2004 12:13:55 -0800
Bob,
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