Rick Tasco at Superstition solarizes his beds, and they are gorgeous.
You need to dig, and amend the beds you want to treat first. Make sure the soil is damp.. Cover with clear plastic in the summer for 4-6 weeks (i think that's what it was) and weight down.. I think I just put a little soil on the edges to seal it well. The heat kills fungus and weed seeds down several inches..
Here's a good article that explains it better than I can.
http://ipm.ucanr.edu/PMG/PESTN...
