Moisture Puts Spotlight On Nitrogen

High corn prices, saturated soils brings up worries about nitrigen loss.

For the second year in a row, growers in many parts of the Midwest are facing moisture-saturated soils that could leave corn short on both nitrogen (N) and yield in 2008. That’s despite the fact that they applied, or are planning to apply, nitrogen at rates that typically are adequate to produce a bin-busting crop.

The possibility that soil moisture conditions could cause large nitrogen losses is especially daunting with corn futures prices above $5 per bushel and in-season nitrogen expected to cost 60 cents or more a pound, says Dr. Tracy Blackmer, research director for the Iowa Soybean Association (ISA) On-Farm Network.

“There is so much money being invested in the crop, and the crop is so valuable, that growers need to devise strategies to counteract what could be a challenging year for supplying adequate nitrogen to the crop,” he says. “I have been getting lots of calls from growers who are concerned. Many of them applied anhydrous ammonia in the fall because it was relatively cheap compared to other forms.”

His advice? Be prepared to make in-season sidedress nitrogen applications if it looks like the crop will come up short on nitrogen. Additional nitrogen applied at planting could be wasted if conditions are conducive to large N losses.

Based on ISA On-Farm Network research, he suggests sidedressing 50 pounds per acre of additional nitrogen if rainfall is more than 13 inches from March through May.

Another alternative to this sidedress-no sidedress approach is to use an optical sensor system to customize the rate, says Blackmer. Optical sensing technology, which is relatively new on the market, assesses actual crop needs and applies the appropriate additional fertilizer rate in a single field pass.

The On-Farm Network tested the GreenSeeker optical sensing and variable-rate application system in 2007, when many Iowa growers also faced saturated soil conditions that short-changed the crop on nitrogen. The six-sensor GreenSeeker RT200 unit, which is mounted on a sidedress nitrogen applicator, uses infrared and near-infrared light to assess plant biomass and health as the rig moves across the field. Fertilizer rates are adjusted on the go, depending on the sensors’ assessment of the crop’s yield potential.

“The research showed that GreenSeeker detected nitrogen stress and applied the amount of nitrogen needed to alleviate it,” he says. “It provided an economic yield response to the extra nitrogen. The sensors can detect early on which plants are stressed. Often, by the time you can visually see that additional nitrogen is needed, it’s too late.”

ISA On-Farm Network’s 2007 stalk testing program confirmed that above-average rainfall can reduce yield from nitrogen loss.

“More than 30% of the fields we tested were low on nitrogen,” he says. “Growers were horrified by what they saw from aerial imagery and the stalk tests. They lost money because they didn’t have enough N for the crop. That really hurts at $5 corn. Growers have to do what they can to protect this high-value yield.”

The ISA On-Farm Network plans to conduct additional research with GreenSeeker technology in 2008. The research is being conducted with support from GreenSeeker manufacturer NTech Industries, Inc., along with its distributor, Redball, LLC.

Visit www.isafarmnet.com for more information on the ISA On-Farm Network. Visit www.greenseeker.com for more information on GreenSeeker.
 

Leave a Reply

Fertilizer Stories

FertilizerPhosphorus: Is Band Or Broadcast Application The Better Method?
February 3, 2016
Is band or broadcast application the better method when it comes to phosphorus? The answer to this question depends mostly Read More
Potash storage at Growmark
FertilizerThe Phosphate And Potash Outlook For 2016
February 2, 2016
Like other commodities, prices of the leading plant nutrient products dropped sharply in 2015. At this writing, the price of Read More
Young Corn Plants
FertilizerNutrient Considerations For Low Corn Prices
February 2, 2016
Corn prices are low and many producers are asking tough questions about their nutrient management programs. Here are some suggestions Read More
Granular urea from CF Industries urea plant in Donaldsonville, LA
FertilizerWhat’s In Store For Nitrogen In 2016
February 2, 2016
Supply is the overriding theme for the North American 2016 nitrogen outlook. In the last 12 months, global factors have Read More
Top 100 Articles
Elburn Cooperative
CropLife 100Elburn Cooperative Members Vote To Join CHS
December 28, 2015
With 81% of eligible producers voting, 94% cast an affirmative ballot for Elburn Cooperative, a diversified agricultural retailer based out Read More
West Central Cooperative, Jefferson, IA
CropLife 100Farmers Cooperative-West Central Merger Approved
December 21, 2015
The members of Farmers Cooperative Co. (FC), Ames, IA, and West Central Cooperative, Ralston, IA, have both approved the merger Read More
Wheat Growers Innovation Center, Bath, SD
CropLife 100Wheat Growers Opens Innovation Center
December 21, 2015
Wheat Growers’ commitment in providing its farmer-owners with the latest in technological advancements now has a one-of-a-kind focal point, as Read More
CropLife 100ARA Selects The Andersons As 2015 Retailer Of The Year
December 9, 2015
The Agricultural Retailers Association today named Maumee, OH-based The Andersons as its Retailer of the Year for 2015. The award Read More
CPS Washington Court House John Deere Sprayer
CropLife 100Application Equipment Report: It Is Easy Being Green For Top 100 Ag Retailers
December 5, 2015
On The Muppets television show, Kermit the Frog is famous for singing a song about the troubles he encounters in Read More
Fertilizer Bin
CropLife 100Fertilizer Sales: Another Down Year For Top 100 Ag Retailers
December 4, 2015
In pure number terms, the fertilizer category still dominates all crop inputs/services among CropLife 100 ag retailers. In 2015, for Read More
Latest News
Crop InputsBayer Contests EPA’s Decision On Valuable Insecticide F…
February 5, 2016
Crop Science, a division of Bayer, has announced it has refused a request by the Environmental Protection Agency (EPA) to Read More
Wheat Field North Dakota
Seed/BiotechSyngenta Wins Seed Fraud Suit Against South Dakota Grow…
February 5, 2016
Syngenta has obtained a $25,000 settlement from Paul and John Mayclin, Mayclin Farms, Plankinton, SD, in response to their Plant Read More
ManagementOABA Annual Conference Wraps Up In Columbus
February 5, 2016
More than 300 Ohio AgriBusiness Association (OABA) members and industry professionals were on hand to engage in collaborative learning and Read More
Crop InputsBayer To Contest EPA Flubendiamide Decision
February 5, 2016
Crop Science, a division of Bayer, announced today it has refused a request by EPA to voluntarily cancel the uses Read More
Syngenta
Seed/BiotechNot So Fast: ChemChina Syngenta Takeover Could Draw Nat…
February 5, 2016
State-owned China National Chemical Corp. (ChemChina), which plans to buy Swiss seeds and pesticide maker Syngenta, will promptly start preparations Read More
Rendering of Syngenta Seedcare Institute expansion
Seed/BiotechExpansion Of Syngenta’s North America Seedcare In…
February 4, 2016
As demand for seed treatment knowledge and products grows among farmers, retailers and others in the seed industry, Syngenta is Read More
Soybean Field
Industry NewsArysta LifeScience Strengthens Sales Team
February 4, 2016
Arysta LifeScience North America recently announced three new personnel additions: Jake Cook and Peter White are Territory Sales Managers for Read More
Davor Pisk Syngenta COO
Crop InputsSyngenta COO: Why ChemChina Offer Beat Monsanto’s
February 4, 2016
Syngenta Chief Operating Officer Davor Pisk says he is confident the proposed acquisition by ChemChina will ultimately help preserve choice Read More
Young corn plants in soil
Crop InputsKoch Biological Solutions Invests In Pathway Biologic
February 4, 2016
An affiliate of Koch Biological Solutions, LLC has acquired a minority equity position in, and entered into collaboration with, Pathway Read More
Crop InputsABG: China Signs Off On Monsanto’s Roundup Ready …
February 3, 2016
Monsanto Co. on Wednesday announced it plans to launch its Roundup Ready 2 Xtend soybeans in time for the 2016 Read More
Syngenta headquarters in Basel, Switzerland
Crop Inputs6 Things To Know About The ChemChina-Syngenta Deal
February 3, 2016
After months of rumors and speculation, Syngenta has announced that ChemChina has offered to acquire the Swiss-based company. “In making Read More
FertilizerPhosphorus: Is Band Or Broadcast Application The Better…
February 3, 2016
Is band or broadcast application the better method when it comes to phosphorus? The answer to this question depends mostly Read More
Syngenta Sign
Crop InputsChemChina Nearing Deal To Buy Syngenta For Record $43 B…
February 3, 2016
China National Chemical Corp. is nearing an agreement to buy Swiss pesticide-and-seeds-maker Syngenta AG for about 43.7 billion francs ($42.8 Read More
Herbicides2015 ASA Trials Demonstrate Valent Fierce XLT Herbicide…
February 2, 2016
Valent U.S.A. today announced that new Fierce XLT Soybean Herbicide ranks in the top tier among growers for length of Read More
Crop Protection Products in storage
Paul SchrimpfCrop Input Selling: Return Of The Price List
February 2, 2016
It was a good 15 years ago, shortly after I first started writing for this esteemed publication, that it all Read More
Potash storage at Growmark
FertilizerThe Phosphate And Potash Outlook For 2016
February 2, 2016
Like other commodities, prices of the leading plant nutrient products dropped sharply in 2015. At this writing, the price of Read More
Chesapeake Bay
StewardshipKeeping A Watch On Water Issues
February 2, 2016
During a down cycle in the market, it’s difficult to think about investing for the long term. For retail businesses, Read More
Young Corn Plants
FertilizerNutrient Considerations For Low Corn Prices
February 2, 2016
Corn prices are low and many producers are asking tough questions about their nutrient management programs. Here are some suggestions Read More