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, [email protected])

Leave a Reply

Crop Inputs Stories

Illinois Researchers
FertilizerMeasure Of Age In Soil Nitrogen Could Help Precision Agriculture
July 26, 2016
What’s good for crops is not always good for the environment. Nitrogen, a key nutrient for plants, can cause problems Read More
Kochia
Crop InputsNufarm Launches New Herbicide for Resistant Kochia
July 25, 2016
Nufarm introduces Scorch herbicide for U.S. farmers and ranchers combating a broad range of troublesome broadleaf weeds. A unique premix Read More
Syngenta Sign
Crop InputsBloomberg: Syngenta-Chem China Deal on Track for Regulatory Approval
July 25, 2016
Syngenta AG, which has agreed to be taken over by China National Chemical Corp. for $43 billion, said talks with Read More
Crop InputsMonsanto: EU Approves Roundup Ready 2 Xtend Imports
July 22, 2016
Monsanto Co. announced today that the European Commission has granted import approval for Roundup Ready 2 Xtend soybeans. This milestone Read More
Trending Articles
Heritage Cooperative
Retail FacilitiesKahler Automation Designs State-Of-The-Art Facility For Heritage Cooperative
July 4, 2016
Heritage Cooperative in Marysville, OH, needed an efficient liquid, dry and grain facility to serve the many needs of their Read More
The Andersons Waterloo
ManagementFirst Indiana Facility Certified Under 4R Nutrient Stewardship Certification Program
June 27, 2016
The 4R Nutrient Stewardship Certification Program has announced that The Andersons, Inc.’s Waterloo, IN, facility has been added to its Read More
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To Explore IT Solutions
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
Monsanto Luling Plant
Eric SfiligojWhat’s Next For Monsanto?
May 31, 2016
For the folks at Monsanto’s headquarters in St. Louis, MO, it has been an eventful few weeks. Back on May Read More
Soybean Plant closeup
Industry NewsMonsanto Rejects Bayer Bid; Open To More Talks
May 25, 2016
Monsanto Co, the world’s largest seed company, turned down Bayer AG’s $62 billion acquisition bid as “incomplete and financially inadequate” Read More
Eric SfiligojPity The Monsanto Haters
May 23, 2016
An old saying goes thus: “Be careful what you wish for. You just might get it.” Given current events, there Read More
Latest News
Illinois Researchers
FertilizerMeasure Of Age In Soil Nitrogen Could Help Precision Ag…
July 26, 2016
What’s good for crops is not always good for the environment. Nitrogen, a key nutrient for plants, can cause problems Read More
Kochia
Crop InputsNufarm Launches New Herbicide for Resistant Kochia
July 25, 2016
Nufarm introduces Scorch herbicide for U.S. farmers and ranchers combating a broad range of troublesome broadleaf weeds. A unique premix Read More
ManagementNew Rabobank Report Calls for Farmer ROI Focus
July 25, 2016
As U.S. row crop farmers brace themselves for a third year of negative margins, Rabobank believes farmers must lower the Read More
Syngenta Sign
Crop InputsBloomberg: Syngenta-Chem China Deal on Track for Regula…
July 25, 2016
Syngenta AG, which has agreed to be taken over by China National Chemical Corp. for $43 billion, said talks with Read More
ManagementGROWMARK Meeting Visit, Company Takeover Updates, and R…
July 22, 2016
Editors Paul Schrimpf and Eric Sfiligoj discuss their recent speaking engagement at GROWMARK’s eastern event, crop protection company merger rumors, Read More
Crop InputsMonsanto: EU Approves Roundup Ready 2 Xtend Imports
July 22, 2016
Monsanto Co. announced today that the European Commission has granted import approval for Roundup Ready 2 Xtend soybeans. This milestone Read More
Syngenta headquarters in Basel, Switzerland
Crop InputsSyngenta Announces Alfalfa Seed Split Off
July 22, 2016
On September 1, 2016, Syngenta will transfer sales and distribution of alfalfa seed to the NEXGROW branded business that is Read More
Dow DuPont
Crop InputsDuPont, Dow Shareholders Approve Merger
July 21, 2016
DuPont and The Dow Chemical Company announced that, at their respective special meetings of stockholders held today, stockholders of both Read More
ManagementLand O’Lakes Announces SUSTAIN Business Unit, Oth…
July 20, 2016
Land O’Lakes, Inc. today announced the formal organization of a new business unit, SUSTAIN, and its leadership. SUSTAIN will focus Read More
Monsanto Luling Plant
Crop InputsReport: Bayer Shareholder Proposes Monsanto ‘Host…
July 20, 2016
One of Bayer AG’s top 20 shareholders said Wednesday it may make sense for the life-science company to launch an Read More
Young Corn Closeup
Industry NewsNew Leaf Symbiotics Snags Former Monsanto Microbials Le…
July 20, 2016
NewLeaf Symbiotics, announced today the appointment of Dr. Janne Kerovuo as Vice President for Research and Discovery.  Dr. Kerovuo comes Read More
Corn and ditch
ManagementStudy: Saturated Buffers Reduce Nitrates From Subsurfac…
July 19, 2016
The Agricultural Drainage Management Coalition (ADMC), Agricultural Drainage Management Systems Task Force and Dr. Dan Jaynes with the National Laboratory Read More
Case sprayer nozzle closeup
EquipmentAgronomists, CCAs, Custom Applicators Invited To FSR Ag…
July 19, 2016
Agronomists, Certified Crop Advisers (CCA) and custom applicators can stay current on agronomy issues on the grounds of the Farm Read More
Soybean Field
LegislationOhio Soybean Association Names Brian Hill Legislator Of…
July 19, 2016
The Ohio Soybean Association (OSA) has announced that State Representative Brian Hill (R-Zanesville) has been named one of two Legislators of Read More
Eric SfiligojThe Latest Monsanto Rumors: A Game Of Tones
July 18, 2016
When companies are engaged in the back-and-forth of the acquisition game, the tone of their various announcements is always important. Read More
Nozzle spray close-up
AdjuvantsWest Central Distribution Introduces New Elite Family O…
July 14, 2016
West Central Distribution recently released a new line of Elite adjuvants to work alongside the new herbicide technologies that combat Read More
Bayer sign
Crop InputsBayer Makes New Offer For Monsanto
July 14, 2016
Bayer AG boosted its takeover offer for Monsanto Co. to about $65 billion in a bid to overcome the U.S. Read More
ManagementAn Update on Water
July 14, 2016
CropLife Editors Eric Sfiligoj and Matthew Grassi discuss agricultural water issues in conjunction with a recent field trip in Ohio. Read More