Rules of thumb to compare canola fertiliser needs to those of wheat.

Canola:

  • Shows lower response to applied N,
  • Is better at extracting P from the soil,
  • Is more critical to ensure adequate K levels,
  • Has higher S requirement,
  • Is more sensitive to low pH, and
  • Is less responsive to trace elements.

Caution: Canola growers should take care with fertiliser placement in the seed row to avoid toxicity to germinating seedlings. Increased risk occurs at wider rows and with disc seeders in zero-till systems.

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