Expert: Early Spring Nitrogen Application Unlikely To Increase Wheat Yields

Despite the fact that an unusually wet fall and planting delays kept many wheat farmers from applying starter nitrogen, an Ohio State University Extension educator says they shouldn’t rush to apply spring nitrogen earlier than needed.

Even though wheat has had less time to grow and tiller, applying nitrogen too early in the spring could not only cause farmers to lose money, but also present environmental concerns — and it isn’t likely to increase yields, said Ed Lentz, associate professor who specializes in crop production and agronomy.

Instead of applying nitrogen early, Lentz said farmers should wait until green-up, at the earliest, to maximize yield potential, save money and guard the environment.

“Producers have asked if applying nitrogen earlier would offset the low fall tiller numbers and would tiller number and growth benefit from a split application,” said Lentz, who also is an OSU Extension educator in agriculture and natural resources. “In a word, the answer to that question is a resounding no.

“Our research has found that early application won’t result in more fertile tillers nor will it help to compensate for the fewer tillers we had in the fall,” he added. “And the later fertile tillers you get in the spring won’t produce the larger yields that would have been produced from fall tillers.”

Oftentimes, farmers may want to get into their fields and spread nitrogen early because labor doesn’t conflict with other field operations and they can avoid the risk of wet conditions after green-up.

“But there is no benefit for the wheat crop to apply nitrogen earlier,” Lentz said, noting that wheat does not readily take up nitrogen until after the stems begin to elongate, which is about six to eight weeks after green-up.

“So while it may be more convenient, it is riskier for nitrogen loss and won’t help your crop, so why take the risk of losing it in rain runoff?” Lentz said.

He said the general recommendation is to apply nitrogen one time between green-up and early stem elongation. That leaves anywhere from four to eight weeks (depending on the year) to apply nitrogen without having any yield decreases.

“And for those farmers who are nervous that they didn’t get any nitrogen applied in the fall, the unusually mild winter we’ve experienced this year has most likely allowed the soil organic matter to release more nitrogen than you’d typically see in a colder winter,” Lentz said. “Don’t change your management practices because of the unusual year we’ve had.”

Growers could also consider split application of nitrogen, which may result in larger yields compared to a single topdress at initial green-up, depending on the weather. Lentz said a split would also be a hedge if inclement weather prevented nitrogen being applied at stem elongation.

But, research has shown that a single topdress of nitrogen applied at early stem elongation yielded as well or better than a split application, and unless large nitrogen losses occurred at early green-up, yields were similar between early green-up and split applications.

“Growers also need to keep in mind that if nitrogen losses were great at early green-up, nitrogen would also be lost from the first part of a split program,” he said. “Thus a producer applying at the right time and selecting the right nitrogen source should expect yields similar to a split application, which saves money and the potential damage of a second trip across the field.”

Leave a Reply

Management Stories
ManagementMACA 2014: The State Of The Agricultural Industry, And Then Some
October 9, 2014
The trade association’s annual gathering featured speakers from across agriculture and beyond. Read More
StewardshipA Multi-Layered Approach To Water Quality
October 6, 2014
Illinois event highlights research and technology designed to better monitor and improve water quality — and the benefits of cooperative, coordinated effort. Read More
StewardshipMichigan Agriculture Leaders On Toledo Water Ban: We Want To Be Part Of The Conversation
August 8, 2014
Leaders of Michigan agricultural organizations said Thursday that the government should not have a “knee-jerk reaction” based on last weekend’s water ban in Toledo due to fertilizer run-off in Lake Erie. Read More
ManagementRussia Bans U.S. And EU Ag Product Imports In Ukraine Sanctions Battle
August 7, 2014
Russian President Vladimir Putin has banned the import of agricultural goods from countries that have imposed sanctions on Russia. Read More
Top 100 Articles
CropLife 100Pinnacle Agriculture Acquires Minnesota Retailer
April 14, 2015
Pinnacle Agriculture Holdings, LLC, ranked No. 6 on the CropLife 100,  has successfully acquired Liebl Ag, LLC in Ada, MN.  Read More
CropLife 100CHS, Aurora Cooperative Complete Fertilizer Storage, Grain Shuttle Loading Facility
April 13, 2015
CHS Inc., the nation’s leading cooperative and ranked No. 5 on the CropLife 100, and Aurora Cooperative (ranked No. 21) Read More
CropLife 100GROWMARK Acquires Missouri Refined Fuels Terminal
April 2, 2015
Bloomington, IL-based GROWMARK and Magellan Pipeline Co. have entered into an agreement in which GROWMARK will acquire the refined fuels Read More
CropLife 100Wilbur-Ellis Acquires South Dakota Retailer
April 2, 2015
Wilbur-Ellis Co.’s Agribusiness Division, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed Read More
CropLife 100The McGregor Co. Closes Smith-Kem Acquisition
April 2, 2015
The McGregor Co. — ranked No. 16 on the CropLife 100 list of largest U.S. ag retailers — has completed Read More
CropLife 100BRANDT Commemorates National Ag Day
March 20, 2015
The Illinois agriculture community gathered at BRANDT global headquarters on March 18 to celebrate National Ag Day behind this year's theme Sustaining Future Generations. Read More
Latest News
Industry NewsCHS Insurance Names New Director Of Sales
April 17, 2015
Bryan Lewis has been named director of sales for CHS Insurance, the nation’s largest agribusiness insurance broker and full-service insurance Read More
Mature Waterhemp in Corn
HerbicidesGenetic Literacy Project: There’s No Such Thing A…
April 17, 2015
Read the latest “analysis” on GMOs from Consumer Reports and you’ll “learn” that glyphosate, the chemical developed by Monsanto (its Read More
HerbicidesNew Resistance To 2,4-D Discovered In Australia
April 17, 2015
In a world-first case of herbicide resistance, researchers have confirmed that sowthistle weed in the south east of South Australia Read More
ManagementNews From RTP Company Visits and Growers Buying Older S…
April 16, 2015
Paul Schrimpf and Eric Sfiligoj discuss recent trips to the Research Triangle Park area and market seed sales trends. Read More
soybean field
StewardshipNew ASABE Standard Establishes Framework For Sustainabl…
April 16, 2015
The American Society of Agricultural and Biological Engineers (ASABE) has initiated a project to develop a new standard to establish Read More
MicronutrientsSouthern States: An Inside Look At Our Tissue Sampling …
April 15, 2015
Remember learning about the food pyramid in school? The nutritional diagram recommends the proper amount of nutrients you need on Read More
Industry NewsArysta Adds New U.S. Fungicides Marketing Manager
April 15, 2015
Arysta LifeScience North America recently hired Deneen Sebastian as its Marketing Manager for U.S. Row Crops, Fungicides. Most recently, Sebastian Read More
FungicidesVerdesian Launches Phosphite-Based Cereal Fungicide
April 14, 2015
A new, phosphite-based fungicide designed for improved suppression of deoxynivalenol (DON) in wheat and barley infected by Fusarium head blight Read More
Mature Waterhemp in Corn
HerbicidesSURVEY: Close To 90% Of Growers Battle Weed Resistance
April 14, 2015
Herbicide resistance management continues to be a priority for corn and soybean growers, and they’re working together more effectively to Read More
CropLife 100Pinnacle Agriculture Acquires Minnesota Retailer
April 14, 2015
Pinnacle Agriculture Holdings, LLC, ranked No. 6 on the CropLife 100,  has successfully acquired Liebl Ag, LLC in Ada, MN.  Read More
StewardshipFMC Corp. Joins Sustainable Agriculture Alliance
April 14, 2015
FMC Corp. has joined Field to Market: The Alliance for Sustainable Agriculture, a multi-stakeholder initiative working to define, measure and Read More
Industry NewsArysta Adds Two To Goëmar Sales Team
April 14, 2015
Arysta LifeScience North America recently announced two new additions to the Goëmar sales team: Steve Kelly, Technical Service Manager – Read More
Valley Variable Rate Irrigation
Precision AgVariable Rate Irrigation Gains Followers
April 14, 2015
Irrigation systems have had the ability to apply different amounts of water throughout a field for decades, using timers that Read More
CropLife 100CHS, Aurora Cooperative Complete Fertilizer Storage, Gr…
April 13, 2015
CHS Inc., the nation’s leading cooperative and ranked No. 5 on the CropLife 100, and Aurora Cooperative (ranked No. 21) Read More
Soybean field
Industry NewsThree Ag Co-ops Poised For Possible Merger
April 13, 2015
Following months of study and preparations, the Board of Directors for United Farmers Coop (UFC), Farmers Elevator Cooperative (FEC) and Read More
Eric SfiligojAgriculture Braces For More Belt-Tightening
April 13, 2015
Spring is in full bloom across the U.S. and ag retailers and their grower-customers are busily getting into high gear. Read More
ManagementPollinator Health and Washington, DC
April 9, 2015
CropLife America’s Kellie Bray speaks with CropLife Editor Eric Sfiligoj regarding bee health and proposed Beltway regulations. Read More
InsecticidesValent Takes On MGK Insecticide Portfolio
April 9, 2015
As of April 1, Valent U.S.A. Corp. became the exclusive provider of the MGK crop protection line of insect control Read More