2017
Varietal Response to Planting Date Trial
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Contributor/Checkoff:
North Carolina Soybean Producers Association
Category:
Sustainable Production
Keywords:
DiseaseField management Pest
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Katherine Drake Stowe, US Soybean Research Collaborative
Co-Principal Investigators:
Project Code:
P17-021
Contributing Organization (Checkoff):
North Carolina Soybean Producers Association
$72,500
Institution Funded:
North Carolina State University
$72,500
Brief Project Summary:

Soybean producers and consultants have been trying to push the yield limits on modern, high-yielding soybean varieties in recent years. Planting date and variety selection play a major role in determining yield potential. Many growers have been experimenting with varieties of different maturity groups in their cropping systems. The growing success of planting earlier maturing varieties during the early portion of the seasonal planting window creates a platform that challenges individual variety performance. Also, the performance of indeterminate soybeans is challenging yields of determinate soybeans throughout the season, including double cropped soybeans. This research, conducted at five locations, evaluates the impact of planting date and maturity group on soybean yields.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Project Deliverables

Final Project Results

Although no statistical differences were observed across locations when comparing varieties, planting date was critical to maximizing the yield potential of RM 5.2 or earlier. Planting in April for these maturities increased yield nearly5 bu/A on average compared to mid-May plantings, and nearly 10 bu/A on average above beans planted in mid-June. In contrast, when comparing the latter maturing 5 varieties, planting date caused no yield response. The results of this study show that more research is necessary to explore how progressive soybean farmers can utilize the early portion of the planting window, and what varieties are optimum when utilizing this planting strategy. In addition, more research is needed to compare indeterminate and determinate varieties within maturity groups across planting dates.

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.