Digging into Research
Phosphorus (P) fertilization did not increase seed yield, regardless of P rate, P placement or Olsen soil test P level, except for one out of 28 site-years. High rates of seed-placed P reduced stand establishment at 5 of 28 site-years. Limited research had been conducted on...
Starter phosphorus (P) and zinc (Zn) fertilizer increased early-season growth, plant height, P concentration, and uptake of P and Zn in plant tissue, relative to the unfertilized control. In some cases, starter fertilizer reduced days to maturity and grain moisture content. The largest responses were...
Growing soybean on high soil mineral nitrogen (N) fields, or when N fertilizer was applied in increasing rates, resulted in an increase in volunteer canola competition and a corresponding linear decrease in soybean yield. Research was conducted in Manitoba looking at the resource-ratio (R*) hypothesis. This...
The economic optimum seeding rate for irrigated soybeans in southern Alberta was calculated to be 58 seeds/m2 at 80% emergence, which is equivalent to 5.8 seeds/ft2 or 252,000 seeds/acre. In southern Alberta, the development of very early maturing varieties in the MG 00 and MG 000...
Research shows that the highest plant densities and yields were produced at a narrow row spacing of 9 inches compared to those of 12, 18 and 24 inch spacings in a no-till production system. Increasing seeding rates of 2.8, 5.7 and 8.5 pounds per acre...
Soybeans were found to be largely unresponsive to potassium (K) fertilizer even on low K-testing soils in Manitoba. Despite visual K deficiency symptoms mid-season, there were still no yield responses to K fertilizer at varying rates and placements. The current soil test threshold of 100...
Environmental factors and location affect soybean phenology, seed yield and seed quality for early maturity groups in northern environments. Baseline environmental and phenological trends with established yield and seed quality components were developed for early maturing soybean that will support the optimization of soybean breeding...
Action and economic thresholds for volunteer Roundup Ready canola in Roundup Ready soybean were determined. Economic thresholds of less than 0.5 plants/ft2 (<5 plants/m2) highlight the highly competitive nature of volunteer canola in soybean crops. Volunteer glyphosate-resistant (GR) canola is a challenge for Roundup Ready soybean...
Twenty short season soybean cultivars were evaluated for root rot on saline soils. While there were differences among cultivars in tolerance to Fusarium avenaceum and Rhizoctonia solani and different salinity levels, all cultivars were still impacted to varying degrees. The objectives of the research were to...
All 15 PRE followed by POST herbicide combinations provided better control of volunteer canola compared with the glyphosate-only control, but tribenuron (i.e. Express SG) followed by bentazon, and tribenuron followed by imazamox plus bentazon (i.e. Viper ADV) provided solutions that were low cost, registered in...
