Interesting article on alternative weed control methods for organic growers. We used a flamer for a couple of seasons. It works, I just have trouble burning that much fossil fuel to keep weeds under control. We changed our crop mix and rotation instead. The walnut hulls looks a little more promising. It doesn’t pump as much fossil carbon into the atmosphere and there are no combustion products.
http://www.tristateneighbor.com/news/crop/article_2e51b216-27fd-11e1-a6a6-0019bb2963f4.html