The benefit of break options to wheat production at Appila


Research organisatons
Funding source

Trial details

Researcher(s) Nigel Wilhelm (SARDI)
Year(s) 2013
Contributor Upper North Farming Systems
Trial location(s) Appilla, SA
The benefit of break options to wheat production at Appila locations

To address the need for a non-cereal crop and pasture options to provide profitable rotational crops, disease breaks and weed control opportunities for cereal production in low rainfall regions of south-eastern Australia.

Key messages
  • All two year break options increased yield by 0.5–1.0 t/ha compared to continuous wheat.
  • Single year breaks improved wheat yields in 2012 and also appeared to increase them slightly in 2013.
  • Grassy weeds had a major impact on wheat yields.
  • Only 2 year breaks reduced grassy weed seed banks substantially compared to the continuouswheat control.
Lead research organisation South Australian Research and Development Institute
Host research organisation Upper North Farming Systems
Trial funding source GRDC
Related program Crop Sequencing Initiative

Ian Keller

Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Crop: Rotation
Trial type Experimental
Trial design Replicated

Appilla 2013

Sow date 17 May 2013
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Other trial notes

There are five trials in total in the project, all similar in scale to the one at Appila.All have fully assessed the impact of one and two year breaks on wheat production for the first time. Most of these trials started with grassy weed and root disease pressures. These trials have consistently shown yield increases of wheat in 2013 of up to 1/ha, regardless of the yield of the continuous wheat benchmark. All two year breaks which reduced grassy weeds and rhizoctonia inoculum resulted in such wheat yield increases, regardless of the options making up the two year breaks.

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Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Appilla, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Appilla, SA Sodosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Appilla SA
2013 578.4mm
2012 609.1mm
2011 609.6mm
2010 616.6mm
2009 610.2mm
2008 589.7mm
2007 600.7mm
2006 577.6mm
2005 606.9mm
2004 596.2mm
2003 577.2mm
2002 553.4mm
2001 591.0mm
2000 543.6mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties



Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Appilla SA

NOTE: Exact trial site locality unknown - Climate data may not be accurate

Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial report and links

2013 trial report

Trial last modified: 27-06-2019 11:33am AEST