
So Far, This Corn Defies the DroughtBy Don Comis August 11, 1999Despite soil-parching drought, green
sweet-corn plants tower six feet above protective organic mulch in a cornfield
in Beltsville, Md. Nearby, corn planted in bare soil won't be worth harvesting.
Both fields are at the Beltsville (Md.) Agricultural Research Center (BARC), part of the
Agricultural Research Service,
USDA's chief scientific agency. Key to sustaining the corn through the drought is hairy vetch, a legume
grown as a cover crop. The vetch--killed before researchers planted the
corn--forms a dense mat. It helps rain or irrigation water seep in rather than
flow across fields and erode the soil. The mulch also slows evaporation and
supplies natural nitrogen fertilizer. The 7,000-acre BARC now uses hairy vetch to grow much of the corn needed for
its livestock. The researchers have already developed vetch systems for
tomatoes--now being adopted by some growers--and are testing similar cover
crops with peppers, cantaloupes, snap beans and other vegetables. Organic mulch is vital to the center's program in sustainable
agriculture--that is, farming in ways both economical and environmentally
friendly, and relying on renewable, on-farm resources. That's why biodiesel is the newest contribution to Beltsville's
seven-year-old sustainable farming program. Beginning this month, biodiesel, a
mix of 20 percent soybean oil and 80-percent regular diesel fuel, will power
all farm and road crew diesel vehicles on the center's 6,000-acre east side.
Researchers will compare the two fuels for engine performance and wear. The
program is part of a federal effort to reduce reliance on petroleum while
creating new markets for U.S. crops. A fact sheet on the center's biodiesel use
is on the web at: http://www.ars.usda.gov/is/pr/1999/990811.biodiesel.htm Scientific contact: Ronald F. Korcak, ARS Beltsville Area Office,
Agricultural Research Service, Beltsville, Md., Beltsville, Md., phone (301)
504-5193, fax (301) 504-5863, [email protected]. U.S. Department of Agriculture | |