Green-Up Marks Time To Apply Nitrogen In Winter Wheat

Spring nitrogen should be applied before the beginning of stem elongation to maximize yield potential, save money and guard the environment, said Ed Lentz, an associate professor who specializes in crop production and agronomy.

“This is the time to do it, but don’t worry if you can’t get on the field yet because you still have time,” he said. “In fact, you have maybe four to six weeks depending on the weather and how fast we warm up. The warmer it is the narrower the window, and the colder the spring the wider the window.”

Historically, wheat in southern Ohio reaches stem elongation in mid-April while northern Ohio wheat reaches stem elongation at the end of April. This year, the state’s wheat crop is likely to reach that stage earlier if the weather stays warmer.

Lentz 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.

“We are experiencing unusually warm temperatures very early this year, considering the record high temperatures experienced around the region in the past week,” Lentz said. “Growers need to be aware that there is the potential for volatilization losses at these temperatures if the area doesn’t get rain soon enough after application of urea products.”

This is a concern, he said, considering that OSU Extension research has shown volatilization losses may contribute to a yield loss of 10 bushels per acre under these conditions.

“Normally at this time of year, we’re not worried about volatilization, since temperatures are low enough that losses are minimal,” Lentz said. “But the increased heat and drying conditions could cause conditions ripe for volatilization losses for urea and 28%, i.e., moist soil rapidly drying from warm winds with temperatures higher than 70.

“Nitrogen losses may be severe under these conditions if rain does not occur between 48 and 72 hours after application. If these conditions occur when applying urea, a urease inhibitor may be used, which should protect urea from volatilization losses for at least a week.”

Growers also could delay urea application until rain is expected. Rainfall needs to total at least a one-quarter inch – preferably one-half inch – to ensure urea is moved into the soil, Lentz said.

Most producers base their nitrogen rates on expected yield, and nitrogen rates should take in account the lower yield potential of fields with reduced stands and tiller numbers.

“Stands need to be evaluated for estimated yields compared to other years,” he said. “Many fields in northwest Ohio were planted late and did not get enough growth to expect high yields.”

Also, many fields have drowned-out areas, but increased nitrogen rates will not correct these problems, he said.

“Ohio State research has shown that yields are not affected by delayed nitrogen until after early stem elongation, which is generally the end of April,” Lentz said. “Studies over a five-year period have shown that yields were the same or slightly better when a single application occurred at Feekes 6, which is the first node visible of early stem elongation, compared to initial green-up.

“Yields dropped 10 to 15% when a single application was delayed to early boot stage. At this time, we would recommend producers to apply nitrogen as soon as field conditions allow application equipment.”

Leave a Reply

Fertilizer Stories

FertilizerNutrient Management, Conservation Among Topics Covered At Indiana CCA Conference
November 23, 2016
Certified crop advisers, consultants, farmers, agribusiness professionals and students will learn more about nutrient management, soil and water conservation, pest Read More
NutriSphere-N Application
Crop InputsVerdesian: NutriSphere-N Making A Water Quality Difference In Midwest
November 18, 2016
Farmers sitting on the largest aquifer in the United States have learned a thing or two about managing nitrogen (N) Read More
FertilizerThe Fertilizer Institute Issues Statement On The U.S. Elections
November 10, 2016
The Fertilizer Institute (TFI) President Chris Jahn has issued the following statement on the results of the 2016 elections: “TFI Read More
Fertilizer Storage
FertilizerThe Fertilizer Institute Hires New Director Of Agronomy
November 4, 2016
The Fertilizer Institute (TFI) has hired Dr. Sally Flis as its director of agronomy, a new position created to support Read More
Trending Articles
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
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsanto Merger
November 21, 2016
Missouri Gov. Jay Nixon visited Bayer AG global headquarters in Leverkusen, Germany, on November 18 to discuss the proposed Bayer-Monsanto Read More
STS16 2017
SprayersHagie Manufacturing Releases 2017 STS16 Sprayer To Market
November 16, 2016
Hagie Manufacturing LLC’s largest full season applicator is now available with enhancements for the 2017 model year. Hagie is officially Read More
Wilco
CropLife 100Valley Agronomics, Wilco-Winfield To Form New Agronomy Joint Venture
November 11, 2016
Valley Agronomics LLC, headquartered in Rupert, ID, is a joint venture between Valley Wide Cooperative and Winfield Solutions, LLC. Wilco-Winfield, Read More
Latest News
HerbicidesHerbicides 2017: New Cropping Systems Set For Debut
December 7, 2016
Herbicide-resistant weed are inching ever-closer to a potentially frightening saturation point here in the U.S. Heading into 2016, USDA planting Read More
CropLife 100Wilbur-Ellis Acquires Michigan Ag Retailer
December 7, 2016
Wilbur-Ellis’ Agribusiness, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed and nutritional Read More
Fertilizer storage The Andersons
CropLife 1002016 Fertilizer Report: Another Really Rough Year For A…
December 7, 2016
In many ways, the fertilizer category cannot seem to catch a break. During the early part of the 2010s decade, 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
Winter wheat
HerbicidesTalinor Herbicide Approved For Wheat And Barley
December 7, 2016
Talinor herbicide from Syngenta has received federal registration from the U.S. EPA, giving wheat and barley growers a new option Read More
Forage Sorghum
UncategorizedMilestone Achievement Continues For Dow AgroSciences, A…
December 7, 2016
New and innovative forage products are on the horizon driven by continued collaboration between Dow AgroSciences, a wholly owned subsidiary Read More
Palmer pigweed seedhead in cotton
HerbicidesNew WSSA Factsheet Explores Weed Seeds And Their Longev…
December 7, 2016
Did you know some weed seeds can lie dormant in the soil for more than a century and then sprout Read More
Crop InputsARA 2016: 5 Developments Worth Monitoring Into 2017
December 6, 2016
You can pretty much set your watch to it (do people even still wear watches? I know I do…but I’m Read More
Tim McCardle, ARA Chairman
CropLife 100BRANDT COO Named ARA Chairman
December 5, 2016
BRANDT EVP and Chief Operating Officer Tim McArdle has been named chairman of the Agricultural Retailers Association (ARA) during a Read More
Crop InputsWilbur-Ellis Receives ResponsibleAg Certification At Mo…
December 5, 2016
Wilbur-Ellis Co., a recognized leader in precision agriculture technology and the distribution of crop protection products, announces the ResponsibleAg certification Read More
Young Corn Closeup
Eric SfiligojThe Read On 2017 For Agricultural Fortunes Is Anybody’s…
December 5, 2016
As I (and others) have written in recent months, the nation has just experienced one of the most offbeat election Read More
Acceleron B-300 seed coating
Crop InputsThe BioAg Alliance Launches New Yield-Boosting Microbia…
December 5, 2016
As part of their commitment to develop and commercialize innovative microbial solutions for farmers through The BioAg Alliance, Monsanto Co. Read More
ManagementCorn and soy planting update; Takeaways from Climate Co…
December 2, 2016
AgriBusiness Global Editor Dave Frabotta Joins Paul Schrimpf for a discussion of global corn and soybean planting trends, and a Read More
Radish cover crop taproot
Crop InputsSoil Health Institute, Datu Research Receive Grant To E…
December 1, 2016
The Soil Health Institute (SHI) and Datu Research have announced a $626,000 grant from the Walton Family Foundation to quantify the 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
ManagementAg Industry Comes Together To Address Climate Change
December 1, 2016
Addressing climate change — and more specifically, decreasing greenhouse gas emissions from agriculture — can only be achieved through collective Read More
Young soybean field
HerbicidesLiquid Formulation Valor EZ Herbicide Available For 201…
December 1, 2016
Valent U.S.A. Corp. has released Valor EZ; a liquid formulation of the company’s leading herbicide, Valor. Named Valor EZ Herbicide Read More
Key Cooperative Marcus Construction Steel Building
ManagementThe Value Of Cooperatives In Modern Agriculture
December 1, 2016
Editor’s Note: Jaxon Mullinnix of  Lone Tree, IA, was recently named the Iowa state winner of the 2017 GROWMARK essay Read More