More Crops, Much More Residue

More Crops, Much More Residue

WITH MOST CORN BELT no-tillers growing only corn and soybeans, many of the major benefits of crop rotations are being overlooked. Even so, a recent University of Illinois study on the impact crop rotations have on soil quality may have raised more questions due to the favorable results found with continuous corn.

Graduate assistants Mollie Adams and Stacy Zuber recently evaluated the impact of rotations on soil bulk density, organic matter and water stability at five Illinois locations. While the results were mixed, corn and wheat residues definitely boost soil organic quality.

“We want the decomposition process to occur more slowly and this happens with both corn and wheat residue,” Zuber says.

Both corn and wheat residues attach a considerable amount of carbon to each particle of nitrogen (N). But as the soil breakdown process takes place, soil microbes need more N to free the carbon.

In these studies, a rotation of corn, soybeans and wheat improved soil quality the most. Interestingly enough, the heavy residues found with continuous corn also performed well.

“Although rotations affect the soil, there’s nothing consistent,” Adams says. “Soil is a constantly evolving thing, and there are a lot of forces acting upon it. Assessing soil quality is really complicated.”

Weather Concerns.

Much of the land in Illinois this year was inundated with excessive rainfall during the prime growth period. Water infiltration is important in such a year, since drowned-out areas are common.

“With heavy rainfall, we want to make…

To view the content, please subscribe or login.
 Premium content is for our Digital-only and Premium subscribers. A Print-only subscription doesn't qualify. Please purchase/upgrade a subscription with the Digital product to get access to all No-Till Farmer content and archives online. Learn more about the different versions and what is included.

Lessiter frank

Frank Lessiter

Frank Lessiter has served as editor of No-Till Farmer since the publication was launched in November of 1972. Raised on a six-generation Michigan Centennial Farm, he has spent his entire career in agricultural journalism. Lessiter is a dairy science graduate from Michigan State University.

Top Articles

Current Issue


No-Till Farmer

Get full access NOW to the most comprehensive, powerful and easy-to-use online resource for no-tillage practices. Just one good idea will pay for your subscription hundreds of times over.

Subscribe Now

View More

Must Read Free Eguides

Download these helpful knowledge building tools

View More
Top Directory Listings