SOUTHERN grain growers could maximise returns this harvest by simply raising the height of their header’s cutter bar.
An early outcome from research undertaken by CSIRO and Farmlink Research indicates large volumes of biomass passing through the header will inhibit some grain from reaching the bin.
The trial work, featured in a new video from the Grains Research & Development Corporation (GRDC), focused on cereal crops grown in high rainfall zones within the southern region and where harvest high was 15 centimetres.
In comparison a higher cutter bar height of approximately 60 centimetres not only reduced the amount of straw and trash being processed along with the grain, it allowed the harvester to travel faster, improving harvest efficiency. The research project is part of a major GRDC investment under its national Stubble Initiative.
Another outcome from the trial’s first year is that by harvesting higher in retained stubble farming systems, hair pinning at sowing which prevents seed soil contact is also reduced and crop emergence significantly improved.