ILLUSIONS OF SUSTAINABILITY:
ORGANIC BELIEVERS SPEAK OUT
By Dennis T. Avery
Unfortunately, Rick, 28 counties in your region are famous for mudslides, massive soil erosion, and Black Blizzard dust clouds. The Upper Mississippi Loess Hills are unstable leftovers from the last Ice Age. During the Dust Bowl, they suffered 15 times as much erosion as they do today. Without careful farming they could start eroding again, triggered by an erosion event like last month’s “thousand-year” rain.
Organic farmers refuse to use no-till farming, and this is nearly criminal in the Loess Hills. Dr. Stanley Trimble, America’s top soil erosion expert, says Loess Hills farmers cut their erosion by 95 percent after the Dust Bowl, using contour planting, more crop rotations, fencing off woodlots — and, more recently, low-till farming.
Actually, Tim, they didn’t, and that’s the whole point I’m trying to make. Dr. Trimble made an emergency trip to the Loess Hills after the recent flood event, because the extreme storms are what start the erosion process, and advance it most rapidly. He found NO evidence of sediment movement in the no-till fields, even on steep slopes. He found massive evidence of erosion in the conventional fields. He didn’t visit organic farms, but, if Minnesota Extension is reporting widespread mudslides and soil erosion, that’s a bad sign for farmers rejecting no-till.
Dr. Steven Green of Arkansas State University led a recent study that severely tested no-till for erosion against both organic and conventional farmers. The no-till allowed one-fifth as much erosion as either of the other systems. The no-till advantage is especially great in heavy rainstorms.
During this weather event, organic farming simply wasn’t as soil-safe as no-till, and only 30% better than obsolete chisel tillage (still used by many organic farmers.) All the talk about organic farmers creating better soil health didn’t make any difference to those raindrops.
The no-tillers create a zillion tiny dams in the soil surface with their crop residues. Water infiltration can double, while soil erosion is reduced by more than 90 percent. I thought organic was supposed to be more sustainable, not less.
“Enemies of liberty”? None of those companies can force you to buy or do anything.
Dennis T. Avery is a senior fellow at the Hudson Institute in Washington, D.C., and is the Director of the Institute's Center for
Global Food Issues (www.cgfi.org). Formerly he was a senior analyst for the United States
Department of State. He is the co-author, with atmospheric physicist Fred Singer, of the book, Unstoppable Global Warming:
Every 1500 Years (Blue Ridge Summit, Pennsylvania: Rowman & Littlefield, 2006). Readers may write Avery at Post Office
Box 202, Churchville, Virginia, 24421. Email: cgfi@rica.net
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