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

Flooded corn in Indiana
Crop InputsDelaying The Fertilizer Decision
September 1, 2015
Comments gathered from several retailers recently evidenced a classic good-news-bad-news scenario. Good news is prices and supplies of nitrogen, phosphate, Read More
FertilizerFall-Applied Phosphorus: A Rooted Investment
August 28, 2015
As commodity prices decrease and input prices continue to rise, farmers are seeking more efficient strategies for meeting a high Read More
FertilizerCF Nitrogen Investment: What It Means For CHS
August 13, 2015
A record $2.8 billion investment in nitrogen fertilizer manufacturing through CF Industries Nitrogen, LLC, is a historic step that links Read More
Carl Casale of CHS
FertilizerCF Industries, CHS To Form Strategic Venture
August 12, 2015
CF Industries Holdings, Inc. and CHS Inc. announced today that they have agreed to enter into a strategic venture.  CHS, Read More
Top 100 Articles
Crop InputsLand ‘O Lakes, United Suppliers Finalize Merger
August 24, 2015
According to a press release on August 24, owners of United Suppliers, Inc. and members of Land O’Lakes, Inc. “have Read More
West Central Cooperative, Jefferson, IA
CropLife 100Iowa Cooperatives To Explore Unification
August 19, 2015
The boards of directors at two of Iowa’s leading farmer-owned cooperatives yesterday signed a letter of intent to study the Read More
CropLife 100Southern States Coop Hosting Drone Flight This Friday
August 3, 2015
Southern States Cooperative — No. 9 on the CropLife 100 — is hosting an FAA-approved drone demonstration at Grandview Farms Read More
CropLife 100Aligned Ag Distributors Adds Four New Owners
July 30, 2015
Aligned Ag Distributors LLC has announced the addition of four new customer/owners to Franklin Holding Co. LLC. They are: The Read More
CropLife 100Pinnacle Purchases California-Based Specialty Crops Retailer
July 20, 2015
Pinnacle Agriculture Holdings has successfully acquired California-based NH3 Service Co.  Operating as part of Pinnacle’s Performance Agriculture brand, the new locations Read More
Asmus Farm Supply liquid fertilizer facility features 20,000 square feet
CropLife 100Slideshow: Asmus Farm Supply Shows Off Its New Liquid Fertilizer Facility
July 15, 2015
Asmus Farm Supply, Rake, IA, recently added a new liquid fertilizer facility to its company operations. The new liquid fertilizer Read More
Latest News
ManagementReviewing MAGIE 2015
September 2, 2015
CropLife Editor Eric Sfiligoj talks what he saw at the recent Midwest AG Industries Exposition (MAGIE) show. Read More
Melissa Olds Dow AgroSciences
Crop InputsDow AgroSciences: Highlighting The Past, Present & …
September 2, 2015
In general, media events held by large agricultural suppliers tend to focus primarily on what plans the company has in Read More
Mobile tablet
OpinionTaking Data Head On
September 2, 2015
As you read this column, I’m hoping that if you picked up the phone and gave me a call, you’d Read More
Young soybean field
Industry NewsArysta LifeScience Announces New Business Unit Head For…
September 1, 2015
Arysta LifeScience North America announces the addition of Rico Christensen, Business Unit Head, North America. Christensen will have responsibility for Read More
Wilbur Ellis Pink Soybean Seed Treatment
Crop InputsWilbur-Ellis Goes Pink With Soybean Seed Treatments For…
September 1, 2015
This past year, proceeds of pink-dyed soybeans treated and sold to Wilbur-Ellis seed customers in Chester, SD, went to two Read More
SprayersNORAC Active Wing Roll Slated For More Sprayers
September 1, 2015
NORAC Systems, a member of the Topcon Positioning Group, announces the release of Active Wing Roll for RoGator, Apache, New Read More
Syngenta Sign
FungicidesSyngenta’s Newest Fungicide Receives EPA Approval
September 1, 2015
Syngenta announced today that its newest succinate dehydrogenase inhibitor (SDHI) fungicide – Solatenol – has received registration from EPA and Read More
Flooded corn in Indiana
Crop InputsDelaying The Fertilizer Decision
September 1, 2015
Comments gathered from several retailers recently evidenced a classic good-news-bad-news scenario. Good news is prices and supplies of nitrogen, phosphate, Read More
StewardshipBee Buffer Strip Initiative Seeks 100 Ohio Farmers
August 31, 2015
The U.S. Bee Buffer Project, an initiative of the Pollinator Partnership (P2), Burt’s Bees and The Burt’s Bees Greater Good Read More
2015 ShowStopper Award, MAGIE
EquipmentA ShowStopper From Case IH: The Patriot 2250
August 31, 2015
For nine years now, visitors to the yearly Midwest AG Industries Exposition (MAGIE) show have been tasked with not only Read More
Crop InputsMonsanto, FMC Expand Roundup Ready PLUS Platform
August 31, 2015
FMC Corp. and Monsanto Co. announced today an expanded agreement to continue their participation in the Roundup Ready PLUS Crop Read More
Deere Nutrient Applicator
Eric SfiligojThe Good & Bad News From MAGIE
August 31, 2015
As I write this column, I’ve just returned from the annual Midwest AG Industries (MAGIE) trade show in Bloomington, IL. Read More
CPS Morenci receiving its 4R certification
StewardshipCPS Morenci Becomes First Michigan Facility Certified I…
August 31, 2015
The 4R Nutrient Stewardship Certification Program has announced that Crop Production Services, Inc.’s facility located in Morenci, MI, has been Read More
EquipmentDeere Announces Soucy Track Distribution Alliance
August 28, 2015
John Deere announces an alliance with Soucy Track to sell and distribute products through the John Deere dealer channel. “This Read More
FertilizerFall-Applied Phosphorus: A Rooted Investment
August 28, 2015
As commodity prices decrease and input prices continue to rise, farmers are seeking more efficient strategies for meeting a high Read More
Monsanto Sign
Crop InputsWhat’s Next For Monsanto, Syngenta?
August 28, 2015
After dropping its $47 billion bid to take over Swiss agribusiness firm Syngenta, Monsanto may be turning its focus to Read More
Golden Harvest Corn stalks
Crop InputsMonsanto: Syngenta Not The Only Horse In Crop Protectio…
August 28, 2015
Monsanto Co, having ditched an audacious $46 billion (£30 billion) offer for Syngenta AG, may downshift to a humbler strategy Read More
ManagementConsolidation hits and a miss; And a look at China’s ch…
August 28, 2015
As Monsanto suspends its pursuit of Syngenta, consolidation news at the retail and distribution level heats up. CropLife magazine’s Executive Read More