2018
Best Management of Soybean in a Double Crop System
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Contributor/Checkoff:
Missouri Soybean Merchandising Council
Category:
Sustainable Production
Keywords:
Field management Nutrient managementSoil healthTillageYield trials
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Bill Wiebold, University of Missouri
Co-Principal Investigators:
Project Code:
410
Contributing Organization (Checkoff):
Missouri Soybean Merchandising Council
$20,736
Institution Funded:
University of Missouri
$20,736
Brief Project Summary:

This project uses two experiments to determine the best combination of variety maturity, seedling rate, and pest management practices for soybean in a winter wheat-soybean double crop system. Data will be collected in soybean planted after harvested wheat. Combinations of seed treatment, fungicides, and insecticides will be used to determine best practices for pest management.

Unique Keywords:
#crop management systems
Information And Results
Final Project Results

Updated April 29, 2020:

View uploaded report Word file

This confirms our recommendation that varieties chosen for double crop use should be the same varieties used for full season production.

We have found that yield maximizes in full season soybean production at around 90,000 plants/acre in most years. Results from this experiment confirm that stand densities in double crop system should be greater than full season, although we would predicted that the 130,000 density might yield more than the 105,000 density. The late summer weather during the second year was very dry. That may have limited the yield response to stand density.

Seed treatment increased soybean yield in both years. Average increase was 7%. We’ve never found that seed treatment increased yield of full season soybean. Perhaps stand density is more important for double cropped soybean or some effect on plant health influenced yields.

In-season application of a foliar fungicide increased yields in both years. We did not scout for or identify specific diseases. With a short growing season, protecting leaf area is critical to yield.

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.