Will Corn Following Corn Face Decreased Yield?

The 2010 season was a disappointing one for corn growers in many parts of Illinois, said University of Illinois Extension agronomist Emerson Nafziger. With a statewide average yield of only 157 bushels per acre, just 4.2 bushels higher than the U.S. average, and the third-worst yield in the past decade, many Illinois producers are hoping for a more bountiful 2011.

Over the past 10 years, the Illinois corn yield has averaged 13.7 bushels per acre above the U.S. national average, and has been below the national average only once (by 4.9 bushels in 2005) and above it by as much as 25.1 bushels (2008).

“The major problem in 2010 was heavy rainfall in June that resulted in standing water and saturated soils, which in turn resulted in nitrogen loss and damage to root systems which could not be repaired,” Nafziger said. “As a result, affected fields and parts of fields ended up with shortages of both nitrogen and water, problems made worse by high temperatures and early maturity, and in some cases by dry weather during the latter part of the grainfilling period.”

Corn following corn was particularly hard hit in 2010, and there were numerous reports of larger yield penalties for corn following corn compared to corn following soybean than most have seen for a number of years, he added.

In research trials conducted since 2003, Nafziger saw similar results. He has been comparing continuous corn, corn rotated with soybean, and corn following either corn or soybean in a corn-corn-soybean rotation.

Nafziger said that the rule of thumb for many years has been that corn following corn yields about 10 percent less than corn following soybean. This difference has often been less than that in some recent comparisons, but he said it varies depending on the year.

Across four northern Illinois sites, the yield penalty for continuous corn was about 11 percent in 2008-09, but 19 percent in 2010. Second-year corn in the corn-corn-soybean rotation yielded only 5 percent less than corn following soybean in 2008-09, and 10 percent less in 2010, indicating that having soybeans even two years ago helps lessen the yield penalty for corn following corn. At the two southern Illinois locations, with considerably lower yields, the penalty for continuous compared to rotated corn was substantially less, measured either as bushels or as a percentage, he noted.

Despite the relatively poor performance of corn following corn in 2010, Nafziger said most indications are that this shouldn’t be the expectation for 2011.

“Field and soil conditions are much different than they were a year ago,” he said. “None of the factors of a year ago – late fall harvest, poor tillage conditions, lots of fresh residue on the surface, and much nitrogen yet to apply – exist this spring. We did a massive amount of tillage last fall, in some cases perhaps more than was necessary.”

One additional benefit for producers is that it has not been wet for extended periods when soil temperatures were warm since nitrogen was applied last fall. Most of the nitrogen should still be present, with a good deal of it still in the ammonium form and so not subject to loss.

“Though we can certainly feel good about preparations we’ve been able to make for this spring, we know from history that a good fall doesn’t always mean a good crop the following year,” he cautioned. “Soils are starting to dry out nicely in some areas, but we need to be careful not to undo the compaction relief provided by last fall’s tillage by driving on soils before they’re dry enough.”

Waiting until soils are dry enough at depth (not just over the surface) will help minimize compaction effects, as will using controlled traffic, making fewer tillage passes, and lowering tire pressure.

Nafziger encourages producers to follow the same practices they have been using when planting corn following corn this year.

“Our research shows that both corn after corn and corn after soybean respond similarly to planting date and to plant population, so those should change only as soil conditions and productivity might indicate,” he said. “We’ve never been able to identify hybrids that do consistently better in corn following corn, though corn following corn may tend to experience stress (primarily drought stress) and foliar diseases more often, so that should be factored in. And corn following corn typically needs a little more nitrogen — see the N Rate Calculator for current numbers.”

Remember the important things this planting season, Nafziger said.

“Having good soil conditions where the seed is placed and good rooting conditions beneath the surface are critically important for corn no matter what the previous crop,” he said. “And the crop needs to be well provided with nutrients and protected from pests. Once we cover these basics, the crop will respond mostly to weather factors – water and temperature – that we don’t control. That has always been true, and will be true again in 2011.”

(Source: Emerson Nafziger, Extension Specialist, Crop Production, ednaf@illinois.edu)

Leave a Reply

Crop Inputs Stories

Untreated soybean seed Heartland Coop
Seed/BiotechMarrone Bio Innovations, Groundwork BioAg Bio-stacked Microbial Seed Treatments Result In Increased Yields
February 13, 2017
Marrone Bio Innovations, Inc. and Groundwork BioAg, Ltd have announced successful seed treatment field trials of the world’s first all-biological Read More
Fertilizer Storage
Crop InputsThe State Of The Fertilizer Industry
February 9, 2017
He’s all hat, no horse.” It’s a humorous way of describing a person who tells a good story, but is Read More
Corn Field
InsecticidesArysta LifeScience, DuPont Collaborate On Rynaxpyr Premix Formulations
February 8, 2017
Arysta LifeScience recently announced that it has entered into a global collaboration with DuPont Crop Protection for the development of Read More
World Agri-Tech Innovation Summit Panel 2016
Crop InputsWorld Agri-Tech Innovation Summit To Be Held In San Francisco
February 8, 2017
“Breakthrough Applications and Business Models for Sustainable Farming” is the theme of the World Agri-Tech Innovation Summit to be held Read More
Trending Articles
Farmer and aptop
Matt Hopkins10 Warning Signs Your Website Is Grossly Outdated
February 8, 2017
Your Website is often a visitor’s first impression of your ag retail business. A positive first impression can set the Read More
AgriSync
Matt Hopkins17 Agriculture Apps That Will Help You Farm Smarter In 2017
December 9, 2016
Ag professionals are working smarter, not harder, than ever before. Smart farming technologies have enabled them to reduce costs, maximize Read More
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
Precision AgTrimble Debuts End-to-End FMIS Platform
November 28, 2016
October’s inaugural PrecisionAg Vision Conference left this author with many thoughts and things to ponder in the coming months. Probably Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls And Bears Impacting This Year’s Marketplace
November 28, 2016
For virtually all of 2016, the nation was wholly focused on the big Presidential election. Some folks aligned themselves with Read More
Latest News
Roy Blunt
LegislationARA Recognizes Blunt, Heitkamp For Legislative Efforts …
February 17, 2017
Agricultural industry continues to face federal regulatory challenges. Thankfully, agriculture’s allies in the U.S. Senate stepped forward. The Agricultural Retailers Read More
LegislationThe Fertilizer Institute Commends Senate On Confirmatio…
February 17, 2017
The Fertilizer Institute (TFI) President Chris Jahn issued the following statement on the Senate confirmation of Oklahoma Attorney General Scott Read More
Trump, Senate, Cabinet
LegislationBREAKING: Trump EPA Nominee Scott Pruitt Confirmed by S…
February 17, 2017
Scott Pruitt, who as Oklahoma’s attorney general spent years suing the Environmental Protection Agency over its efforts to regulate various Read More
ManagementFebruary Road Trip Edition
February 17, 2017
Editors Paul Schrimpf and Eric Sfiligoj discuss their recent visits to Indiana and Kentucky. Read More
Heritage Cooperative Finished Building Aerial
ManagementHeritage Cooperative, Agland Co-op Approve Merger
February 17, 2017
Agland Co-op and Heritage Cooperative stockholders have both approved the merger agreement between Agland Co-op and Heritage Cooperative. Now begins Read More
LegislationARA Fly-In: Ag Retail Descends on Capitol Hill, Lawmake…
February 15, 2017
More than 100 agricultural retailers, distributors and suppliers headed to Capitol Hill Tuesday morning for the Agribusiness Congressional Fly-in, according to a Read More
Untreated soybean seed Heartland Coop
Seed/BiotechMarrone Bio Innovations, Groundwork BioAg Bio-stacked M…
February 13, 2017
Marrone Bio Innovations, Inc. and Groundwork BioAg, Ltd have announced successful seed treatment field trials of the world’s first all-biological Read More
NL5000 With G5 Technology
SpreadersNew Leader Introduces NL5000 Dry Nutrient Applicator Wi…
February 13, 2017
New Leader, a division of Highway Equipment Company (HECO), has announced the next generation of spreading technology with the NL5000 Read More
Fertilizer Storage
Crop InputsThe State Of The Fertilizer Industry
February 9, 2017
He’s all hat, no horse.” It’s a humorous way of describing a person who tells a good story, but is Read More
CropLife 100Pinnacle Agriculture Agrees To Credit Agreement Amendme…
February 9, 2017
Pinnacle Operating Corp. has entered into an amendment (the “Amendment”) to its First Lien Credit Agreement that will provide for, Read More
ManagementUpdates on Upcoming Trips, Dow-DuPont, and the Des Moin…
February 9, 2017
Editors Paul Schrimpf and Eric Sfiligoj review a few future travels, along with the latest on big company mergers and Read More
Championship Tractor Pull
EquipmentNational Farm Machinery Show Highlighted By Championshi…
February 9, 2017
The scream of monster engines, the stench of burning rubber and the ground-pounding vibrations of the country’s largest, loudest and Read More
Farmer and aptop
Matt Hopkins10 Warning Signs Your Website Is Grossly Outdated
February 8, 2017
Your Website is often a visitor’s first impression of your ag retail business. A positive first impression can set the Read More
Corn Field
InsecticidesArysta LifeScience, DuPont Collaborate On Rynaxpyr Prem…
February 8, 2017
Arysta LifeScience recently announced that it has entered into a global collaboration with DuPont Crop Protection for the development of Read More
Industry NewsThe Fertilizer Institute Board Elects New Chairman, Vic…
February 8, 2017
The Fertilizer Institute’s (TFI) Board of Directors has elected Chuck Magro, President and CEO of Agrium, and Tony Will, President Read More
Sonny Perdue
ManagementARA Joins More Than 600 Organizations In Support Of Per…
February 8, 2017
The Agricultural Retailers Association (ARA) recently joined with more than 600 agricultural groups on a letter of support for Governor Read More
World Agri-Tech Innovation Summit Panel 2016
Crop InputsWorld Agri-Tech Innovation Summit To Be Held In San Fra…
February 8, 2017
“Breakthrough Applications and Business Models for Sustainable Farming” is the theme of the World Agri-Tech Innovation Summit to be held Read More
Cedar Country Cooperative
Eric SfiligojConsolidation In Agriculture: More Middle Movement
February 7, 2017
If you’ve regularly followed my column, you know I’m something of a movie junkie. Like many, one of my favorite Read More