Nutrition for Hyper Yielding Wheat cv Stockade- WA

• Additional N over the 120kg N/ha farm standard (10N basal + 110N in crop) applied at GS32 was associated with higher grain protein and higher screenings, however yield differences were not statistically significant.
• The only visual differences were observed in response to the horticulture mix (NPKS (13-2-8-14) which delivered only 2kg P/ha.
• Lower rates of phosphate (2kg P/ha) were inferior giving significantly lower dry matters when assessed at 50% head emergence, with lower yields compared to higher rates of phosphate.
• There were no benefits demonstrated to applying higher rates of P than 5 kg/ha P, but variable yields in the trial resulted in no significant differences in yield.
• The lower phosphate rate resulted in lower crop canopy reflectance (crop canopy greenness measured as NDVI) and lower head numbers.
• Manure did not have any significant effect on crop dry matter, head number or yields in 2023 with no significant NDVI effects, unlike results generated in 2022.

Rotation position: 2022 Canola
Soil type: Forest gravel loam
Nitrogen 0-60 cm: 83kg N/ha
Colwell P (ppm) 0-10cm: 43 mg/kg
pH (CaCl2) 0-10cm: 5.9
Organic Carbon (%) 0-10cm: 2.7 %