Seasonal effects of strategic stubble treatments on nitrogen response in wheat in CWFS districts

2015
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Tim Bennett (CWFS)
John Small (CWFS)
Year(s) 2015
Contributor Central West Farming Systems
Trial location(s) Mumbil Creek, NSW
Tottenham, NSW
Weethalle, NSW
Seasonal effects of strategic stubble treatments on nitrogen response in wheat in CWFS districts locations
Aims
  • To investigate the impact of different stubble treatments imposed towards the end of the fallow have on nitrogen response (applied as urea) in wheat yield and quality.
  • To evaluate any interaction between pre-sowing stubble treatment and topdressing timing.
Key messages
  • The seasonal conditions experienced during these trials had a profound impact on the trial results.
  • During 2015 stubble treatments imposed late in fallow had no impact on N response.
  • Similar to 2014, during 2015 generally farmers were unable to predict final yield before sowing when the season experienced extreme weather conditions.
  • During 2015 split N applications did not improve yields and had only a very minor impact on grain quality.
  • During 2015 split N applications was not a way to reduce financial risk as opposed to all N fertiliser upfront since crop outlook at Z30 was positive.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Trial funding source GRDC CWF00018
Related program Maintaining profitable farming systems with retained stubble
Acknowledgments

CWFS would like to acknowledge the support provided by the co-operating farmers; without their in-kind support the trials would not have been possible. The author also thanks Dr Neil Fettell for his support in compiling this report.


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

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser
  • Fertiliser: Timing
  • Stubble: Management
Trial type
Trial design

Mumbil Creek 2015

Sow date 10 June 2015
Harvest date 16 November 2015
Plot size Not specified
Plot replication Not specified

Tottenham 2015

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Weethalle 2015

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Mumbil Creek results

# Treatment 1
Treatment 2
Treatment 3
Grain yield (t/ha) Protein (%) Test weight (kg/hL) Screenings (%)
1 60kg/ha sowing 0 kgN/ha Z21 0 kgN/ha Z30 1.19 16.7 73.3 37.3
2 30kg/ha sowing 30 kgN/ha Z21 0 kgN/ha Z30 1.16 16.7 73.8 38.3
3 20kg/ha sowing 20 kgN/ha Z21 20 kgN/ha Z30 1.15 16.4 74.2 36.6

Grain yield t/ha


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Protein %


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Screenings %


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Test weight kg/hL


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Trial results Weethallie results

# Treatment 1
Treatment 2
Treatment 3
Grain yield (t/ha) Protein (%) Test weight (kg/hL) Screenings (%)
1 60kg/ha sowing 0 kgN/ha Z21 0 kgN/ha Z30 1.19 16.7 73.3 37.3
2 30kg/ha sowing 30 kgN/ha Z21 0 kgN/ha Z30 1.16 16.7 73.8 38.3
3 20kg/ha sowing 20 kgN/ha Z21 20 kgN/ha Z30 1.15 16.4 74.2 36.6

Grain yield t/ha


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Protein %


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Screenings %


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Test weight kg/hL


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Trial results Tottenham results

# Treatment 1
Treatment 2
Treatment 3
Grain yield (t/ha) Protein (%) Test weight (kg/hL) Screenings (%)
1 60kg/ha sowing 0 kgN/ha Z21 0 kgN/ha Z30 1.19 16.7 73.3 37.3
2 30kg/ha sowing 30 kgN/ha Z21 0 kgN/ha Z30 1.16 16.7 73.8 38.3
3 20kg/ha sowing 20 kgN/ha Z21 20 kgN/ha Z30 1.15 16.4 74.2 36.6

Grain yield t/ha


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Protein %


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Screenings %


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Test weight kg/hL


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Mumbil Creek, NSW Sandy loam
Tottenham, NSW Not specified
Weethalle, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Mumbil Creek, NSW Kandosol
Tottenham, NSW Vertosol
Weethalle, NSW Kandosol
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 Mumbil Creek NSW Tottenham NSW Weethalle NSW
2015 564.6mm549.7mm408.3mm
2014 523.9mm560.3mm389.2mm
2013 495.4mm535.0mm374.0mm
2012 549.2mm600.3mm460.3mm
2011 592.4mm613.3mm504.8mm
2010 592.5mm644.7mm490.5mm
2009 575.0mm605.4mm395.3mm
2008 581.5mm602.0mm370.7mm
2007 562.8mm571.0mm268.0mm
2006 557.2mm565.5mm333.9mm
2005 590.8mm599.9mm390.5mm
2004 570.6mm602.9mm338.8mm
2003 573.8mm554.5mm347.2mm
2002 542.2mm530.9mm321.7mm
2001 550.9mm528.4mm383.2mm
2000 552.5mm514.1mm353.4mm
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

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Climate

Derived climate information

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

Mumbil Creek NSW

Tottenham NSW

Weethalle NSW

Mumbil Creek NSW

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

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Weethalle NSW

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
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 last modified: 05-12-2019 14:04pm AEST