Tens of thousands of acres of Mid-Iowa farmland are planted with corn and soybeans in alternate years, the corn extracting nitrogen from the soil one season, the soybeans replenishing it the next.
 According to the state Secretary of Agriculture’s office, Iowa’s corn-and-soy-dominated ag economy earned $20 billion last year, up from $12 billion in 2002.
 Soy-based biodiesel fuel is one of the reasons that happened, according to rural Story City resident Randy Olson, executive director of the Iowa Biodiesel Board.
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(The success of the biodiesel fuel industry relies heavily on biodiesel testing <http://www.youtube.com/watch?v=s32Ke2VzrqU>, not only at the production level but at the consumer level, where degraded fuel may cause engine failures.  Of major concern to diesel and biodiesel users is the very real possibility that water has contaminated their fuel. (See http://www.youtube.com/watch?v=0YcczdvPyAk).  The potential catastrophic impact of this problem is discussed at length  in this video at: http://www.youtube.com/watch?v=-lh4qhXc_5s&feature=youtube_gdata.
Fleet Fuel's  family of inexpensive biodiesel test kits  is just a click away on the internet at:
<http://fleetbiodiesel.com/biodiesel_testing_and_supplies.html>)