Rural Innovator Newsletter Feature: Cover Crops

The number of cover crop acres has increased dramatically over the past five years in Iowa — from less than 10,000 acres in 2009 to about 300,000 acres this fall.
One Iowa farmer who is helping to increase that number is Joe Kriegel who farms and grows cover crops on more than 2,000 acres in Poweshiek County with his three sons, Patrick, Nicholas, and Jared, according to a news release from the Iowa NRCS.
The Kriegels effect on the Iowa cover crop revolution doesn’t stop there. They also harvest cereal rye, red clover, sorghum and other cover crop varieties for use by local farmers.
Joe Kriegel estimates seed from his farms will account for about 4,000 extra cover crop acres this year.
“Like so many farmers, I started using cover crops for erosion control,” he said.
“I grew tired of smoothing the rills and gullies every year. I wish I started using cover crops 40 years ago.”
And, like so many farmers, Kriegel is finding cover crops can do more than just control soil erosion. Cover crops increase organic matter in the soil and improve overall soil health by adding living roots in the ground for more months of the year.
Certain types of cover crops like radishes help water infiltration, and others like cereal rye serve as savings accounts for nitrogen which provide nutrients for upcoming crops.
Kriegel was wise enough to get on the front-end of the cover crops trend. By 2009, he grew 1,200 acres of cereal rye and has grown at least that many acres every year since.
After growing cover crops for several years, Kriegel is committed to keeping his cropland covered year-round with a living-root system.
“The worst thing you can do to a piece of land is leave the soil bare,” he said. “The soil doesn’t function unless something is actually growing.”
Kriegel says when he grows legume cover crops for an entire annual rotation, he may only need half the nitrogen he would normally apply for the following corn crop, helping his bottom line.
He says his cover crop/no-till combination also is saving him money on conservation practice maintenance.
Kriegel re-shaped all of his grassed waterways on one of his fields six years ago. Today, he says they are just like the day he re-shaped them.
On his red clover field, Kriegel says the waterways were shaped 12 years ago.
“After that long, a waterway will oftentimes have gullies running down the sides,” he said.
“This farm has no gullies along the waterways. I think they will last another 20 years.”
“I love what no-till and cover crops are doing for the health of my soils,” said Kriegel. “My fields just keep getting smoother and smoother and smoother.”
Source: Iowa Farmer Today, 11/21/13

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