MORRIS, Minn. - The winds sweeping across the Northern Plains could soon help farmers fertilize their crops of corn, wheat and sorghum.

Minnesota researchers have designed a $3.75 million carbon-free system that uses wind power from a towering turbine to produce anhydrous ammonia, a common nitrogen-based fertilizer.

It's a perfect supply-and-demand match, as the region has no shortage of wind and U.S. farmers use millions of tons of fertilizer, said Michael Reese, director of the University of Minnesota Renewable Energy Center at Morris.

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Dirk Lammers, Associated Press