With this research project, soybeans will be grown in a side-by-side comparison with dry bean to look at agronomic practices for optimum production. Dry beans are often said to be “lazy” nitrogen-fixers, providing little nitrogen for subsequent crops, and the comparison will show if soybeans are better in this regard.
The comparative benefits in terms of nitrogen fixation and release to following crops in rotation (e.g. soft wheat) will be quantified for both dry beans and soybeans. Water use (based on spring and fall gravimetric soil moisture sampling, and rainfall and irrigation water inputs), inputs (fertilizer, pesticides) weed and disease pressures will be assessed. Soybeans and dry beans will be grown at different plant densities (30, 50 and 80 seeds m-2) and row spacing (20, 30 and 60 cm) on different plot land each year (2014, 2015, 2016) and followed by soft wheat used to capture and quantify nitrogen benefits (2015, 2016, 2017). The 60 cm row spacing will be used only for dry beans (conventional wide row spacing). Plant density of 80 seeds m-2 will be used only for soybean as densities >50 seeds m2 have not been shown to increase bean yields.
Theme: Genetic Improvement
Project Title: Comparison of dry bean and soybean for agronomic traits, inputs, diseases and nitrogen-fixing benefits to following crops, water use and harvest losses
Funding partners: Manitoba Pulse and Soybean Growers and Agriculture and Agri‐Food Canada
Research Team: Dr. Francis Larney – AAFC Lethbridge; Dr. Manjula Bandara – Alberta Agriculture; Dr. Doon Pauly – Alberta Agriculture; Dr. Newton Lupwayi – AAFC Lethbridge; Dr. Parthiba Balasubramanian – AAFC Lethbridge; Dr. Syama Chatterton – AAFC Lethbridge; Dr. Thomas Forge – AAFC Summerland
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