Therese McBeath1, Bill Davoren 1, Rick Llewellyn 1, Vadakattu Gupta 1 and Anthony Whitbread 3
1 CSIRO Agriculture Flagship, Waite Precinct, Adelaide. 3 International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Telengana, India.
Peer review: Pilar Muschietti Piana
• The trial provides strong support for the use of soil-specific N management to improve profitability and risk management on Mallee dune-swale paddocks.
• Sandy soil types have consistently shown yield responses to increased inputs of N, while the heavy swale soils have not shown a yield benefit of increased N inputs.
• Nil fertiliser (N & P) has been the most profitable fertiliser treatment on the heaviest swale soil and the least profitable elsewhere.
• Upfront N at a higher rate still appears to generate the most consistent yield increase and profit outcome on the sandy soil types.