Soybean Specialist: Some Farmers May Need To Revise Planting Intentions

Some Indiana soybean farmers are now facing crucial decisions on how to recover from erratic weather that is either delaying their plantings or forcing them to replant, said Purdue Extension soybean specialist Shaun Casteel in Purdue Agriculture News.

Farmers in many areas still needed to plant soybeans as of the first week of June because of large amounts of rain, while others may need to replant. Casteel likened the spring warm-up and field dry-out conditions to a roller coaster.

“Just like any good roller coaster, the rise of temperatures peaked so it could plummet downward while the intensity and frequency of rain skyrocketed,” Casteel said. “All this occurred in our typically prime planting weeks.”

He noted that only a third of Indiana’s soybean crop was planted by May 18. But farmers caught up over the following two weeks by getting nearly half of the crop in the ground. As of June 1, they had planted 81% of it. There were late plantings in three of the past five years.

The need for planting adjustments is greatest for farmers in the central and northern parts of the state. Farmers in the southern half generally have more time because of the longer growing season there.

Casteel said farmers still planting soybeans in June need to consider seeding rates, row width and the maturity group of seeds.

“We need to set the stage for the best possible return on late plantings,” he said.

He offered this guidance:

• Seeding rate: Planting in the first half of June requires increasing seeding rates 10-20 percent to foster quicker row closure and higher pod height with fewer days to flowering. Increased seeding rates will also be needed in those fields that have heavy corn residue, which has been prevalent this planting season because of limited breakdown over the winter.

Farmers who typically plant 140,000 seeds per acre in 15-inch rows should increase the rate to about 170,000 seeds per acre in the second week of June; 185,000 in the third week; and 200,000 in the fourth week. Soybeans will produce fewer main-stem nodes (attachment points of trifoliates and ultimately pods) as planting is delayed, so the increased seeding rates will also help to overcome the shortage in node production.

• Row width: Farmers planting 30-inch rows should consider planting narrower rows with the limited time to flowering. Soybeans typically have a yield advantage of 5-10% for soybeans planted in narrow rows (15 inches or less) compared with wide, 30-inch rows.

“This difference will be even more prominent in late-planting situations,” Casteel said.

Wide rows take nearly 25 days longer to canopy compared with 15-inch rows and 40 days longer than 7.5-inch rows.

• Maturity group: Full-season varieties should be planted until June 15 for the northern quarter of the state, June 20 for the central half and June 25 for the southern quarter. Varieties should be dropped by one-half maturity group from the full-season variety for the area, such as from 3.5 to 3.0, after those dates and planted for another two weeks before farmers consider other alternatives. The lower the maturity group the faster the plant will develop flowers, pods and seeds.

“If you are in a very late planting situation, I suggest back-dating 90 days from the typical fall freeze in your region to determine if you have enough growing season to mature a soybean crop,” Casteel said. “My hope is that you will not need to make that determination.”

Leave a Reply

Crop Inputs Stories
Crop InputsPlatform Specialty Products To Acquire Arysta LifeScience
October 20, 2014
Once the acquisition is complete, Platform Specialty Products will combine Arysta LifeScience with previously acquired companies Agriphar and Chemtura Crop Solutions. Read More
MicronutrientsMicronutrients Going Macro
September 9, 2014
Between 2014’s fantastic growing conditions and a heightened awareness on plant nutrition, the major players in micronutrients are gearing up for another big year. Read More
FertilizerFall Fertility 2014: Forecasting Fertilizer Use
September 7, 2014
Great crops this year have tapped the soil, and fall work is definitely called for, but how challenging will that get? Read More
FungicidesSudden Death Syndrome, Brown Stem Rot Reported In Indiana Soybeans
September 3, 2014
Farmers and retailers should be watching for symptoms of these two diseases over the next few weeks as they are best managed through preventative methods. Read More
Top 100 Articles
CropLife 100The Andersons Acquires South Dakota Plant Nutrient Manufacturer Kay-Flo
May 20, 2015
The Andersons, Inc., ranked No. 22 on the CropLife 100, has purchased Kay Flo Industries of North Sioux City, SD. “This Read More
CropLife 100North Central Farmers Elevator, Wheat Growers Unification Approved By Board, Still Awaits Member Approval
May 13, 2015
The Boards of Directors for North Central Farmers Elevator (NCFE) and Wheat Growers (WG) have voted to approve the Unification Read More
CropLife 100AgGateway’s Barcoding Initiative Progressing Nicely
May 8, 2015
According to legend (or Wikipedia), the first step towards modern bar codes came back in 1948, when Bernard Silver, a 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
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
Latest News
ManagementA New Sprayer Company & UAV Research In The Spotlig…
May 21, 2015
CropLife’s Paul Schrimpf and Eric Sfiligoj talk about a Dutch sprayer manufacturer entering the U.S. with a super-sized entry and Read More
HerbicidesFirst U.S. Sale Of Enlist Duo Herbicide Made By Dow Agr…
May 21, 2015
Dow AgroSciences has recorded the first U.S. sale of Enlist Duo herbicide with Colex-D Technology. This marks the first commercial Read More
CropLife 100The Andersons Acquires South Dakota Plant Nutrient Manu…
May 20, 2015
The Andersons, Inc., ranked No. 22 on the CropLife 100, has purchased Kay Flo Industries of North Sioux City, SD. “This Read More
EquipmentNORAC Options Coming To TerraGator
May 19, 2015
Utilizing NORAC’s Standard Control technology, boom height control is now available for TerraGators with Airmax Precision 2 and Benson Booms. This Read More
Crop InputsHelena Introduces New Soil Health Product
May 19, 2015
Helena Chemical Co. is helping agricultural producers maximize yields and efficiency with the introduction of Liquid Chisel, a new product Read More
Stewardship4R Nutrient Management Planning Certification Now Avail…
May 19, 2015
The American Society of Agronomy (ASA) and the International Certified Crop Adviser (ICCA) program announce a new specialty certification in Read More
Environmental Defense Fund logo
Paul SchrimpfEnvironmental Defense Fund: Appreciating Partners
May 19, 2015
I WAS deep in the throes of preparation for the Commodity Classic meeting that took place this past February, trying Read More
WebinarsUpcoming Webinars
May 19, 2015
Register for one of our upcoming Webinars or access our archive of past Webinars to view recordings of presentations that may be of interest to you. Read More
Syngenta Sign
Seed/BiotechSyngenta Responds To Lawyer’s Victory Claim In Vi…
May 18, 2015
A plaintiff’s lawyer has issued a public statement claiming that damages have been awarded in the Agrisure Viptera corn lawsuits Read More
StewardshipCould Australian Water Trading Approach Fit In Californ…
May 18, 2015
Ten years of drought isn’t a good thing. It doesn’t help the bottom line of farmers or the health of Read More
SpreadersDutch Sprayer Manufacturer To Enter U.S. Market
May 18, 2015
Dutch self-propelled sprayer manufacturer Agrifac Machinery has announced intentions to enter the U.S. market with two models of sprayers available Read More
FertilizerTFI Weighs In On Fertilizer Rail Transport Bill
May 14, 2015
With today’s House Committee on Transportation and Infrastructure as a backdrop, The Fertilizer Institute (TFI) registered its support for policies Read More
ManagementA Visit To The 2015 Environmental Respect Spirit Award …
May 14, 2015
CropLife’s Paul Schrimpf and Eric Sfiligoj talk about a recent visit to the CPS Spirit winner in St. Stephen’s Church, Read More
StewardshipBayer Entomologist Issues Statement On Annual Honeybee …
May 13, 2015
Richard (Dick) Rogers, Principal Scientist / Entomologist, Bayer Bee Care Center for Bayer CropScience LP, today issued the following statement Read More
Crop InputsKansas State Researchers Announce Resistant Kochia Brea…
May 13, 2015
Kansas State University researchers say new research helps explain why an invasive weed is developing resistance to a well-known herbicide, Read More
RR2X soybeans surround untreated check (center)
HerbicidesUSDA Study: Glyphosate Application More Prevalent In So…
May 13, 2015
Glyphosate—known by many trade names, including Roundup—has been the most widely used pesticide in the United States since 2001. It Read More
AdjuvantsHelena Chemical Introduces New Drift Control Adjuvant J…
May 13, 2015
Helena Chemical Co. introduces Justified, an innovative drift control agent designed to improve the performance and precision of spray applications Read More
CropLife 100North Central Farmers Elevator, Wheat Growers Unificati…
May 13, 2015
The Boards of Directors for North Central Farmers Elevator (NCFE) and Wheat Growers (WG) have voted to approve the Unification Read More