Improving Nitrogen Use Efficiency in the High Rainfall Zone of south western Victoria.

Stephen O’Connor 1, Frank Henry1 and Ashley Wallace2, 

1Agriculture Victoria, 915 Mt Napier Rd, Hamilton, Vic, 3300,,
2Agriculture Victoria, 110 Natimuk Rd, Horsham, Vic, 3400


In the south west of Victoria, large grain yields have been achieved by broadcast nitrogen at stem elongation (Z31). However, due to the high annual rainfall of the region (600 mm) a high frequency of denitrification can reduce efficacy of nitrogen and in turn lower yields.

It is possible that mid-row banding nitrogen at sowing would reduce losses from denitrification and give better return on fertiliser investment. This trial showed in the 2018/19 season at Inverleigh, there was no advantage to mid-row band over broadcasting nitrogen at Z31 in a lower rainfall year (decile 1-2 year). To achieve a more conclusive result it would be beneficial to continue mid row banding research to gather data about the practise over several seasons to determine its long-term viability. 


The Australian Society of Agronomy is the professional body for agronomists in Australia. It has approximately 500 active members drawn from government, universities, research organisations and the private sector.

Photo Credits

David Marland Photography Graham Centre for Agricultural Innovation, Charles Sturt University

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