Later Harvest, Greater Yield Loss

Growers waiting to harvest their corn most likely won’t see a significant decrease in grain moisture, but run the risk of increased stalk lodging, moldy ears, and yield losses the longer corn sits in the fields.

Peter Thomison, an Ohio State University Extension corn agronomist, said that unfavorable weather might be keeping growers out of their fields, but they should harvest as promptly as possible.

“We have a fantastic crop out there with yields averaging above 200 bushels per acre in many fields. Why let that crop go down the tube waiting on grain to dry down, which is questionable at this late date?” says Thomison, who also holds an appointment with the Ohio Agricultural Research and Development Center. “Right now in many areas we have a crop that is standing well, exhibiting good plant integrity with stalks looking good and intact ear shanks. But there’s only one direction that plant health is going to go and that’s down. Is a farmer willing to let those yields decrease or accept higher drying costs?”

Thomison points to research he and his colleagues conducted a few years ago, evaluating the state of corn hybrids the longer they stayed in the field. What the researchers found was that the longer corn was left in the field, the more yield loss was experienced — an average of 11 percent between mid-November and mid-December.

“The results of the research suggest that corn can tolerate a harvest delay until mid-November without major yield losses, but after that is when things start falling apart,” Thomison says. “After mid-November harvest delays begin to exact a toll on corn left standing in the field. In some years, our data showed yield losses as low as 5 percent, but in other cases it was as high as 24 percent ”

Thomison says that yield losses are closely associated with stalk lodging, especially with hybrids that are sensitive to stalk rots. Another major concern with leaving corn in the field too long is grain quality. Ears subjected to prolonged wet conditions can turn moldy, potentially contaminating grain with mycotoxins that are harmful to livestock.

“In extreme situations, kernels can start sprouting,” Thomison says, “which adversely affects marketability of the grain.”

According to the Ohio Agricultural Statistics Service, 76 percent of Ohio’s corn crop has been harvested, behind last year as well as the five-year average. Thomison says that farmers either can’t harvest their corn because of unfavorable field conditions or are waiting for the corn to dry down further.

“Perhaps the most striking finding about the research we conducted was that we didn’t see a significant decrease in grain moisture after mid-November," he says. "We saw grain moisture decrease 6.3 percent between mid-October and mid-December, but only 0.5 percent of that dry-down occurred after mid-November. If a grower is expecting to see a big jump in grain moisture change between now and mid-December, our studies would suggest otherwise. We even left corn in the field as late as March and didn’t see a drastic decrease in grain moisture.”

Thomison says that in recent years farmers have experienced good growing conditions that have allowed them to leave corn in the field longer than they probably should.

“But this is probably not the year to do be doing that,” Thomison says.

The last time growers faced delayed harvest issues on this scale was in 1992, when cool, wet conditions in the fall kept some growers out of their fields until that winter.
 

Leave a Reply

Featured Stories

CropLife 100CropLife 100: The Colors Of Custom Application
December 5, 2014
Although many color spray rigs are in the yards of the nation’s top ag retailers, the majority of them still come in only a few shades. Read More
EquipmentAGCO Names Idaho Custom Applicator As 2014 Operator of the Year
December 4, 2014
Praised for his quality work and strong customer relationships, Idaho professional farm applicator Brent Klein has been named by AGCO Application Equipment as 2014 Operator of the Year. Read More
EquipmentAGCO Announces Operator Of The Year Finalists
November 20, 2014
Four custom applicators have been selected by AGCO Application Equipment as finalists for 2014 Operator of the Year, an honor that recognizes them as being among the top professionals in their industry throughout North America. Read More
CropLife 100Pinnacle Ag Acquires Colorado Aerial Application Outlet
November 17, 2014
Ft. Lupton, CO-based Reck Aviation — a full-service chemical application company providing aerial crop applications of fertilizers and crop protection products — will operate as part of Pinnacle's AgOne Application Services brand. Read More

Top 100 Articles

CropLife 100CHS: Driving Momentum To Help Farmer-Owners Grow
December 11, 2014
CHS Inc., the nation’s leading farmer-owned cooperative and a global energy, grains and foods company, must capture new opportunities to Read More
CropLife 100BRANDT, Verdesian Ink Distribution Agreement
December 9, 2014
The agreement grants BRANDT the exclusive right to sell and market Verdesian’s patented Steric chemistry in the Turf and Ornamental and eastern U.S. ag markets under the BRANDT Reaction product line name. Read More
CropLife 100CropLife 100: The Colors Of Custom Application
December 5, 2014
Although many color spray rigs are in the yards of the nation’s top ag retailers, the majority of them still come in only a few shades. Read More
CropLife 100Pinnacle Invests In Meridian Agriculture Distribution
December 4, 2014
Meridian will provide retailers with supplier-branded products and numerous opportunities to differentiate themselves from their competitors. Read More
CropLife 100CropLife 100: Entering A New Seed Era
December 4, 2014
The seed category has been re-vitalized during the past few years, and more good news (and varieties) are headed the industry’s way in 2015. Read More
CropLife 100CropLife 100: The Depressed State Of Fertilizer
December 3, 2014
Following downright giddy growth earlier this decade, fertilizer sales have fallen back down to earth the past two years. Read More

Latest News

Crop InputsNufarm Fills Regulatory VP Position
December 18, 2014
Nufarm announced today that Rob Schwehr has been promoted to the position of Vice President of Innovation & Regulatory Affairs for Nufarm Americas. Read More
Seed/BiotechReport: China Approves Viptera Corn, U.S. Officials Awa…
December 17, 2014
Chinese authorities have informed some agriculture industry officials the government has approved U.S. imports of a type of genetically modified corn developed by Syngenta. Read More
FertilizerMonty’s Plant Food Brings In New Sales Rep
December 16, 2014
Monty's Plant Food Company has hired Warren Kearns as its newest Sales Representative for the South Carolina area. Read More
EquipmentHagie Wins 2014 CropLife IRON Product Of The Year Award
December 15, 2014
The self-propelled sprayer maker has a hit on its hands with the new STS Series model. Read More
Syngenta
Seed/BiotechSyngenta Sees China Approving Contentious GMO Corn Soon
December 15, 2014
Syngenta will make an announcement when it receives official documentation from China that Agrisure Viptera corn, known as MIR 162, has been cleared for import. Read More
Crop InputsVerdesian Life Sciences Names Vice President Of Communi…
December 15, 2014
Amy Bugg will oversee the execution of all promotional strategies for the corporate brand and the complete product portfolio. Read More
StewardshipFarmers, Retailers Attend 4R Certification 4U Workshop
December 15, 2014
More than 160 farmers and ag retailer attended the “4R Certification 4U” workshop December 12 to learn more about the 4Rs of nutrient stewardship, water quality research in the area and cost-sharing opportunities. Read More
Matt Hopkins10 Best New Agriculture Apps For 2015
December 15, 2014
These new agriculture apps are certain to help ag professionals do their jobs more efficiently in 2015 and beyond. Read More
ManagementARA Learnings, Retail Buying Intentions: Welcome To Cro…
December 12, 2014
This informal video program puts news and events effecting retailers into context, and features Editors Paul Schrimpf and Eric Sfiligoj. Read More
Seed/BiotechMonsanto Herbicide-Tolerant Technology Closer To Commer…
December 12, 2014
The final EIS moves Monsanto one step closer to the introduction of Bollgard II XtendFlex cotton and Roundup Ready 2 Xtend soybeans, paving the way to provide access to dicamba-tolerant soybeans and cotton. Read More
Seed/BiotechUSDA Issues Final Environmental Impact Statement On Her…
December 12, 2014
The USDA Animal and Plant Health Inspection Service (APHIS) is issuing a final environmental impact statement on varieties of cotton and soybeans that have been genetically engineered for resistance to several herbicides, including the one known as dicamba. Read More
CropLife 100CHS: Driving Momentum To Help Farmer-Owners Grow
December 11, 2014
CHS Inc., the nation’s leading farmer-owned cooperative and a global energy, grains and foods company, must capture new opportunities to Read More
LegislationARA Applauds CFATS Passage Prior To Holiday Adjournment
December 11, 2014
The streamlined bill provides a four-year authorization of the CFATS program and guidance to DHS on key issues of chemical facility security Read More
Seed/BiotechBayer CropScience’s ILeVO Approved By EPA
December 11, 2014
EPA has approved ILeVO, the only seed treatment that protects the root system against infections caused by the Sudden Death Syndrome fungus and has activity against dangerous nematodes. Read More
Biologicals in Emerging Markets Map.
Crop InputsBiocontrols Could Quadruple By 2025; Will Regulators Pl…
December 11, 2014
The European experience with GMOs offers caution — and a promise — for biologicals. Read More
Crop InputsBASF Donates $75,000 To Feeding America
December 10, 2014
The donation will support Feeding America’s National Produce Program, an initiative that helps with planning, transportation and logistics to ensure fresh produce deliveries to the 200 member food banks around the country. Read More
InsecticidesHow To Avoid Aphid Infestation In Winter Wheat
December 10, 2014
The best strategy for managing aphid infestations in winter wheat — and the potential yellow dwarf diseases that they transmit — is prevention, according to a South Dakota State University Plant Pathology field specialist. Read More
LegislationDufault Installed As New ARA Chair
December 10, 2014
Dave Dufault, Vice President and General Manager of J.R. Simplot Company's Retail Business, was installed as the 2015 Chairman of the Board for ARA on December 4. Read More