|Principal Investigator||Geddes, Charles, Agriculture and Agri-Food Canada - Lethbridge|
|External Funding Partners||Canadian Agricultural Partnership|
|Report||Geddes – IWM – MPSG Annual Extension JAN 2020|
This project aims to provide soybean growers with the tools required to reduce the selection pressure for glyphosate-resistant weeds in soybean cropping systems, and to facilitate the sustainable production of soybean in western Canada. Four separate field experiments will be conducted in the growing seasons of 2019, 2020, and 2021 at various locations in Manitoba, Saskatchewan, and Alberta.
All of the experiments will focus on the performance of soybean in weedy and weed-free conditions. This will aid in our understanding of how weeds impact soybean yield loss and how soybean agronomy may be optimized to mitigate yield loss and also reduce weed seed production. One experiment will assess the impacts of crop sequencing, residue management, and soybean planting date. Another will assess soybean growth habit, maturity grouping and planting date. A third experiment will assess the impacts of fall rye cover cropping, soybean growth habit, row spacing, and seeding rate, while a fourth experiment will determine the optimal soybean row spacing and seeding rate based on soybean growth habit (bushy vs. erect).