To determine the response of increased crop nutrition across a range of elite commercial canola varieties.

• Grain yield in 2022 was lower than what was achieved in 2021. The highest yield was from High input management of 45Y93 CL and 45Y95 CL at 4.05 t/ha (Table 2), but this compares to 6.4 t/ha with high input 45Y95 CL in 2021.
• A combination of very low light (15% lower than average in the crop critical period) and slightly elevated temperatures (5% higher than average, mostly due to elevated minimum temperatures) meant that environmental yield potential was lower than 2021 by 20%, but periods of waterlogging likely impacted yield as well.
• Maturity biomass and harvest index were both lower than 2021. The high yielding plots of 45Y95 CL in 2021 had maturity biomass of ~18 t/ha and harvest index ~0.36, compared with 2022 where 45Y95 CL maturity biomass was 12.8 t/ha and harvest index 0.31 (Figure 1).
• As expected, yield components were also much lower in 2022 than 2021. On average pods/m² and seeds/pod were down 25 and 20% respectively. Seed was larger in 2022 than 2021 by 11% (Table 4).
• There was a 0.23 t/ha benefit of the high input management strategy which included high rates of P, N and 3 t/ha (dry basis) chicken manure (Table 2).
• Triazine tolerant varieties were lower yielding than non-TT varieties.
• 45Y28 RR, Condor TF and Hyola Blazer TT all had relatively high oil concentration (Table 3).

2021 Crop: Wheat
2020 Crop: Canola
2019 Crop: Pasture
Soil type: Red Ferrosol
Available Nitrogen (kg/ha) 0-60cm: 180
Colwell P 0-10cm: 35mg/kg
pH (CaCl2) 0-10cm: 5.4
Organic Carbon 0-10cm: 3.1