2018
Management of Potassium in Oklahoma soybean production systems
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Contributor/Checkoff:
Oklahoma Soybean Board
Category:
Sustainable Production
Keywords:
GeneticsGenomicsSeed quality
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Brian Arnall, Oklahoma State University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Oklahoma Soybean Board
$23,450
Institution Funded:
Oklahoma State University
$23,450
Brief Project Summary:

With recent increases in price and increasing interest integrating new crops into our cropping systems, Oklahoma has seen a drastic increase in soybean acres. Additionally, with higher commodity prices many producers are pushing yields to levels not previously obtained. This has resulted in increased nutrient deficiencies in soybean production, potassium in particular. With this project, locations will be identified throughout the state that have low soil potassium. Additional sites will be found that possess high soil test K levels to use as a testing and application check. Trials will be applied that evaluate pre-plant granular applications compared to in-season foliar herbicides and in-season granular fertilizers.

Key Benefactors:
farmers, agronomists, ag retailers, applicators, extension specialists

Information And Results
Project Deliverables

Data collected will include vegetation samples, crop yield, grain samples. Data will be processed and analyzed using appropriate SAS programming and extended through multiple extension outlets. An additional test will be implemented at the Mingo Valley Research Station in Bixby, OK. This trial will be used to evaluate various in-season foliar fertilizers available commercially for use in soybean. Various commercially available products will be collected from major fertilizer dealers around the state. The PIs will poll several growers and dealers in the state to select the ones with the highest sales or highest usage. All applications will be made based on labeled instructions, but PIs will attempt to make these applications when producers would typically make applications, i.e. paired with herbicide or insecticide applications. Following application of the foliar fertilizers, tissue samples will be collected every day for the first three days as well as another whole plant sample collected 1 week following application. This is meant to see if the foliar fertilizer influenced individual leaf concentrations and where these nutrients were transferred following incorporation. At harvest, grain yields will be collected, and subsamples will be collected from each plot. These subsamples will be analyzed for grain nutrient content. Data will be analyzed, provided to stakeholders in the state, and disseminated through multiple outlets.

Final Project Results

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.