Key Considerations When Deciding To Use Inoculants

The benefit from using rhizobium-containing inoculants is not as clear cut as are the benefits from using fungicide and insecticide seed treatments, according to the Mississippi Soybean Promotion Board (MSPB). We all know that these bacteria must be present in the soil in sufficient numbers for proper nodulation on soybean roots to occur. What we don’t know in such a hard-and-fast fashion is just when to expect an economic or agronomic response when inoculants are applied.

Points to consider in the decision of whether or not to use an inoculant are:

  • An appropriate inoculant is cheap, generally less than $3/acre. Thus, cost is not a factor in deciding whether or not to inoculate.
  • Do not apply inoculants to gain a yield increase. Rather, apply them to ensure that nitrogen fixation will be sufficient for the crop to realize the yield potential from the planted site.
  • Inoculants are generally not compatible with fungicide seed treatments, so inoculant application must be made at planting. This will slow the planting operation.
  • There is overwhelming evidence that applying inoculants to soils that have recently been cropped to soybeans provides no yield benefit.
  • The cheapness of inoculants warrants their application when soybeans have not been grown recently on a site and the risk of insufficient native soil inoculum is high. The importance of this fact is because there is no option after planting but to apply expensive nitrogen fertilizer to overcome the effects of poor nodulation.
  • With the change in cropping systems that is occurring in Mississippi, it is a good idea to inoculate when soybeans are planted on a site that has had continuous cotton or corn or if the site has not been cropped to soybeans in the last 4 to 5 years.
  • There is a potential advantage from choosing inoculant products that contain more than one strain of bacteria.
  • Results from a study that was planted behind the 2011 flood in Mississippi showed no advantage for applying inoculants even though the flood period was several weeks.

For more information, read MSPB’s “Soybean Seed Treatments and Inoculants.”

Leave a Reply

Seed/Biotech Stories

Corn Field
Seed/BiotechCorn Insect Bt Technologies Offer Cost-effective, Proactive Protection
June 26, 2017
When farm economics are challenging, farmers look for ways to bolster profit margins, including reducing input costs. Some may think Read More
Seed/BiotechDow AgroSciences Announces Launch of Enlist Corn for 2018 Planting
June 14, 2017
Enlist corn will be commercially available in the U.S. for the 2018 growing season. Dow AgroSciences announced the launch today Read More
Soybean Closeup
Seed/BiotechEAG Laboratories Licensing Dow AgroSciences’ Plextein Technology
June 7, 2017
Time is money in the highly regulated world of agricultural biotechnology, and the ability to quickly quantitate endogenous allergens is Read More
Young corn plants in soil
Crop InputsFortenza Insecticide Seed Treatment Receives EPA Registration
May 25, 2017
Fortenza seed treatment insecticide from Syngenta has received registration approval from the U.S. EPA for use on corn and cotton Read More
Trending Articles
PrecisionAg Vision Conference
Precision AgPrecisionAg® Vision Conference: Focused on the Future
June 13, 2017
PrecisionAg® is pleased to announce the return of its PrecisionAg Vision Conference, October 10-12, 2017. Based on overwhelmingly positive response Read More
Redbanded-stinkbug-on-soybean-Photo-credit-Thomas-County-Ag
Crop InputsExperts: Mild Winter, Early Planting Will Increase Soybean Insect Threat
June 12, 2017
Higher than average temperatures this past winter affected much of the nation, especially the South and Midwest. The National Centers Read More
Eric SfiligojMonsanto ‘Picks Its Battles’ by Nixing Deere Deal
May 23, 2017
Having been in the trade journalism game since the mid-1980s, I remember several watershed moments during my career. One of Read More
Migrant farm workers
LegislationTrump: Immigration Crackdown Won’t Impact U.S. Agriculture
May 16, 2017
President Donald Trump said he would seek to keep his tough immigration enforcement policies from harming the U.S. farm industry Read More
AGCO Ratliff featured
Eric SfiligojRemembering Robert Ratliff
May 15, 2017
With all the fast-paced happenings in agriculture this spring, with multiple mergers in the works and planting season in full Read More
Case sprayer nozzle closeup
EquipmentSpray Application: A Nozzle Renaissance
May 2, 2017
If you had asked four-decade ag veteran Mark Bartel, President of Wilger Inc., just a few years ago what lay Read More
Latest News
Young Corn Plants
Eric SfiligojLaunching New Seed Traits: Wait on China . . . Or Else!
June 26, 2017
In life, no one likes the waiting game. In agriculture, however, playing the waiting game is very important – especially Read More
Monsanto sign
Crop InputsMonsanto Speaks on Dicamba Issues in Arkansas
June 26, 2017
Monsanto’s Chief Technology Officer, Robb Fraley, issued the following statement following the Arkansas State Plant Board’s proposal to ban dicamba, Read More
Corn Field
Seed/BiotechCorn Insect Bt Technologies Offer Cost-effective, Proac…
June 26, 2017
When farm economics are challenging, farmers look for ways to bolster profit margins, including reducing input costs. Some may think Read More
Crop InputsArkansas Plant Board Votes to Ban Dicamba — Now W…
June 23, 2017
The Arkansas State Plant Board has voted to pass a proposed emergency rule to ban the use of in-crop dicamba, Read More
Engenia soybeans
Crop InputsBASF: ‘Closely Monitoring’ Dicamba Situatio…
June 22, 2017
BASF, whose Engenia herbicide is the target of more than 200 drift complaints in Arkansas, emailed the following statement to Read More
ManagementConsolidation Update
June 22, 2017
Editors Paul Schrimpf and Eric Sfiligoj discuss progress on manufacturer consolidation, and another big move for Midwest cooperative Central Valley Read More
Palmer pigweed seedhead in cotton
Crop InputsThreat of Dicamba Ban Looms in Arkansas
June 22, 2017
The Arkansas State Plant Board has rejected a proposed ban on the use of dicamba herbicide, but a procedural error Read More
Potash Agrium
Crop InputsAgrium-PotashCorp to become Nutrien upon Merger Complet…
June 21, 2017
Potash Corporation of Saskatchewan Inc. and Agrium Inc. have announced today that once the anticipated merger transaction closes, the new Read More
Crop InputsMidwestern BioAg Hosts TerraNu Fertilizer Plant Opening…
June 20, 2017
Last Friday, Midwestern BioAg was joined by over 80 local farmers, media and staff to celebrate the grand opening of Read More
Soybean Field
Industry NewsAligned Ag Distributors Names New President
June 19, 2017
Aligned Ag Distributors LLC announced this morning the appointment of Mary Tolke to the position of President/CEO, effective July 1. Read More
ManagementPlotting Corn, AGCO/Asmark’s Applicator Training Center…
June 15, 2017
Editors Paul Schrimpf and Eric Sfiligoj talk about their recent visits to Columbus, OH, and Bloomington, IL, along with an Read More
Seed/BiotechDow AgroSciences Announces Launch of Enlist Corn for 20…
June 14, 2017
Enlist corn will be commercially available in the U.S. for the 2018 growing season. Dow AgroSciences announced the launch today Read More
ASMARK AGCO Applicator Training Center
EmployeesAsmark, AGCO Open Training Center for Beginning Applica…
June 13, 2017
AGCO Corp. and the Asmark Institute have opened a new Applicator Training Center, created in a collaboration between the two Read More
Power to Do More Contest Winners
HerbicidesDow AgroSciences Announces Three Winners in Power to Do…
June 13, 2017
Thousands of votes have been cast and three farmers have been awarded the power to do more with a $10,000 Read More
Frogeye leaf spot
FungicidesStrobilurin-resistant Frogeye Leaf Spot Threat Looms wi…
June 13, 2017
Heavy spring rainfall throughout the South and Midwest delayed planting and created the perfect environment for diseases like frogeye leaf Read More
PrecisionAg Vision Conference
Precision AgPrecisionAg® Vision Conference: Focused on the Future
June 13, 2017
PrecisionAg® is pleased to announce the return of its PrecisionAg Vision Conference, October 10-12, 2017. Based on overwhelmingly positive response Read More
CHS St. Paul, MN fertilizer terminal
LegislationICGA Praises President Trump’s Remarks on Waterwa…
June 12, 2017
Illinois Corn Growers Association President Justin Durdan, a farmer from Utica, issued the following statement regarding President Donald Trump’s comments Read More
Wheat Growers
UncategorizedWheat Growers Names Tracy Linbo as Senior Vice Presiden…
June 12, 2017
Wheat Growers has hired Tracy Linbo as Senior Vice President of Agronomy. Linbo joins Wheat Growers after having served 10 Read More