2021
Iowa Contributions to Amplifying Extension Impact: Agronomists Collaboratively Delivering Soybean Best Management Practices
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Contributor/Checkoff:
Iowa Soybean Association
Category:
Sustainable Production
Keywords:
DiseaseField management Pest
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Mark Licht, Iowa State University
Co-Principal Investigators:
Fernando Marcos, Iowa State University
Project Code:
023068
Contributing Organization (Checkoff):
Iowa Soybean Association
$10,000
Leveraged Funding (Non-Checkoff):
This contracted project is leveraging a USB contracted project to facilitate collaborative efforts of Extension soybean specialists across the U.S.
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Institution Funded:
Iowa State University
$10,000
Brief Project Summary:

The U.S. Soybean Extension Specialist working group has been intentional about identifying best management practice focuses that will have national Extension impact. This project allows Iowa State University to participate fully in the collaborative, multi-state research conducted by this group. Local research on topics like soybean N-fixation, biological seed treatments and more is integral to providing soybean farmers with the tools and information they need to continue increasing their quality and efficiency, ultimately allowing us to develop and deliver best management practices on a national scale.

Key Benefactors:
farmers, agronomists, Extension agents

Information And Results
Project Deliverables

It is planned to participate in the collaborative USB project and conduct one or two trials as decided upon by the collaboration. The trial(s) will be conducted at the Ag Engineering and Agronomy Research Farm near Ames, IA.

Final Project Results

Update:
Year one of this project is considered complete. With plans in motion for a second year covered by a project renewal. Soil and plant samples that were collected were sent to Ignacio Ciampitti (Kansas St. Univ.) and Seth Naeve (Univ. of Minn.) for sample analysis and incorporation into a multi-year, multi-state analysis and reporting. Earlier this month, the Iowa field data collection of stand counts, vegetation assessment, canopy cover, etc. were reported into the larger multi-state database.

In 2021, a similar trend was found at both Ames and Sutherland locations where the 'Full' treatment (150 lb N and 15 lb S at both planting and R3) had significantly higher yields than the untreated control. However, all treatments (urea only - 26 lb N; gypsum only - 30 lb S; ammonium sulfate - 26 lb N and 30 lb S; and full) did not produce a profitable yield response (ie. cost of product and application was greater than yield response times commodity price). The grain yield and grain yield response was greater at Sutherland compared to Ames. This may be an indication that soybean response to N and S application is, at least, partially driven by productivity level. Results on soil nitrate and N fixation have not been analyzed yet.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.