2016
Refining Ohio fertilizer recommendations for soybeans
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Contributor/Checkoff:
Ohio Soybean Council
Category:
Sustainable Production
Keywords:
GeneticsGenomicsSeed quality
Parent Project:
Refining Soil Fertility Recommendations for Soybeans in Ohio
Lead Principal Investigator:
Steve Culman, The Ohio State University
Co-Principal Investigators:
Anne Dorrance, The Ohio State University
Laura Lindsey, The Ohio State University
+1 More
Project Code:
16-R-21
Contributing Organization (Checkoff):
Ohio Soybean Council
(n/a)
Institution Funded:
The Ohio State University
(n/a)
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

First quarter (December 2015): Finish 2nd year of trials with harvest. Analyze leaf tissue and grain for nutrient content. Assess disease and insect predation onsoybean pods and seeds. Begin to summarize 2nd year field data.
Second quarter (March 2016): Finish analysis and summary of 2nd
year field data and report findings to farmer cooperators. Develop and present findings in farmer winter meetings, Soybean Colleges and C.O.R.N. newsletter articles. Continue greenhouse experiments to
examine effects of fertility on insect feeding and diseases. Recruit growers for 2016 field season.
Third quarter (June 2016): Complete planning and coordinate establishment of ~30 trials across the state. Collect soil samples and begin to send to laboratory for analysis.
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Fourth quarter (September 2016): Continue maintaining field trials and collect field data. Begin analysis of multi-year data to build a model and determine critical and maintenance ranges
based on soil extractable nutrients and tissue analysis.

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.