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Turnaround in yield potential for the west

Rainfall in late July and early August changes the outlook for grain growers in some parts of Western Australia. Earlier this month AEGIC released a statement on the changing fortunes of the 2015 season. The STIN model predicted the average wheat yield across the state of Western Australia moving from 1.53t/ha to 2.02t/ha in response to the rainfall.

For growers who received the rainfall:

  • In the north it’s likely too late in the season for any management action to change crop yield outcomes.
  • In the central region there’s now only a small time window for growers to apply additional nitrogen to chase the higher yield potential.
  • Further south growers have a little more time to make their decisions. Nitrogen decisions are always best made on a paddock by paddock basis.
  • Micronutrient deficiencies, particularly copper, can appear in late in the season. Tissue testing to confirm a deficiency and prompt application of a deficient micronutrient can improve yield up until flowering, although best done before early stem elongation.

Acknowledgements

Technical input provided by Liam Ryan, DAFWA and James Easton, CSBP

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