December 30, 2007
While most farmers are dabbling in a 2% blend of biodiesel, at least two farmers from Iowa have taken biodiesel usage to a new level. David Oberbroeckling and Roger Halliday use anywhere from a 20% to 100% blend on their farms.
In September of 2001, Oberbroeckling, who farms in Davenport, IA, started using a 20% blend after several months of requesting that his distributor provide soy diesel (commonly referred to as B20). He wanted the advantages that straight petroleum diesel simply can't offer.
For the rest of the article. http://cornandsoybeandigest.com/mag/soybean_big_biodiesel/index.html
There are also many great links to articles on this page from the Corn and Soybean Digest.