2017
Revising Fertilizer Recommendations for Soybeans
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Contributor/Checkoff:
Ohio Soybean Council
Category:
Sustainable Production
Keywords:
GeneticsGenomicsSeed quality
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Steve Culman, The Ohio State University
Co-Principal Investigators:
Project Code:
17-R-25
Contributing Organization (Checkoff):
Ohio Soybean Council
$124,000
Institution Funded:
The Ohio State University
$124,000
Brief Project Summary:

This project intends to re-evaluate the soil fertility recommendations for Ohio soybeans, focusing specifically on phosphorous and potassium and the role fertility plays in soybean resistance to pests and disease. It takes a multi-faceted approach to examine soil fertility rates with pest and disease interactions over both research and farm fields. Research should determine economically optimal P and K fertilization rate for soybeans in Ohio by refining yield response curves, region-specific and soil type-specific calibration curves of Bray P to Mehlich P soil levels in Ohio and the impact that soil fertility levels have on populations of and corresponding yield reductions caused by SCN, soil borne pathogens and insect pests.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Project Deliverables

• Key findings from first, second and third years to be incorporated into Soybean Workshops and Extension training.
• Compile, analyze and summarize all soybean trial data and revise nutrient recommendations. Release Ohio-specific nutrient recommendations for soybean farmers.
• Integrate data and approach into Tri-State Fertilizer Recommendations, second version.

Final Project Results

Update:
We conducted of 15 phosphorus (P) trials, 15 potassium (K) trials and 11 sulfur (S) trials, for a total of 41 trials in 2017. We have compiled all data from soybean P, K, S fertilizer trials. Analysis in progress. We have submitted Ohio micronutrient factsheet for peer-review. We compiled 194 total studies (144 in soybean) that tested crop yield response to micronutrient fertilization. This represents a major effort of compiling and all available data in one place and guide management of micronutrients in field crop production.

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.