Seeding Rates for Precision Seeded Canola

Researcher: Gazali Issah, Mathew Vercaigne, Eric Johnson, Stewart Brandt, Chris Holzapfel, Lana Shaw and Anne Kirk

Project Code: CARP-SCDC 2012-20

Final Report: March 2015

Summary: Non-uniform canola plant distribution within the row can result in greater intraspecific competition, potentially increasing seedling mortality and reducing yield potential. An evenly distributed canola population may allow producers to target lower plant populations and hence use lower seeding rates without reductions in yield. SeedMaster proposes that its UltraPro canola meter can seed canola more uniformly potentially allowing producers to reduce seeding rates while maintaining maximum yield potential. The objectives of this experiment were 1) to determine if the UltraPro canola roller produces more uniform canola seed placement than conventional fluted rollers and 2) to determine if more uniform plant density has the potential for allowing lower canola seeding rates. The treatments were a factorial arrangement of seeding rates at 10, 20, 40, 80, 160 and 320 seeds m-2 metered with either the traditional fluted Valmar roller or SeedMaster’s UltraPro roller. Seeding rate was the only factor to significantly affect plant density, maturity and seed yield. There were generally no differences in plant density in spring or fall, seed yield or maturity between the roller types at any level of seeding rate. Although there appeared to be more uniform distribution of seedlings, on average, with the UltraPro roller than the Valmar at 10-80 seeds m-2 seeding rates, this did not translate into improvements in seed yield. Differences in uniformity generally disappeared at fall plant population assessment, likely due to the self-thinning nature of canola.

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