2017
Agronomic Evaluation of USDA Heat-Tolerant Maturity Group III Soybean Germplasm for Use in the Early Soybean Production System
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Contributor/Checkoff:
Mississippi Soybean Promotion Board
Category:
Sustainable Production
Keywords:
GeneticsGenomics
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
John Orlowski, Cornell University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Mississippi Soybean Promotion Board
$14,964
Institution Funded:
Mississippi State University
$14,964
Brief Project Summary:

The focus of this research project is to agronomically and economically evaluate heat-tolerant maturity group 3 soybean genotypes that have been recently developed by the USDA-ARS, as well as commercially available MG 3 soybeans. Trials compare productivity and grain quality of three newly developed ARS late MG 3 soybean lines to three traditional late MG 3 soybean cultivars, compare narrow row to wide row soybean production for MG 3 varieties and examine the economic considerations of the using both commercially available and USDA-bred MG 3 soybeans.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Project Deliverables

1. When data were averaged over variety and row spacing, soybean yields were higher with late planting date in both years, likely due to delayed emergence for the May planting date and to very dry weather conditions coupled with dry soil at planting.
2. Seed yield of DS 65-1 was significantly lower than that of all other varieties for both planting dates used in this study. No yield differences were observed for varieties in 2017.
3. When averaged across varieties and planting dates, narrow row spacing (20 in.) increased soybean yield by 3.6 bu/acre compared to soybeans planted on wide rows (40 in.) only in 2016.
4. An interaction between row spacing and planting date in 2017 showed that soybean yields were 12.2 bu/acre greater with wide row spacing than with narrow row spacing for the late planting date. No differences were observed for yield due to row spacing for the early planting date in 2017.

Final Project Results

Yields can be significantly improved if the use of MG III varieties could allow dry land farmers to harvest soybean before the onset of summer drought.

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.