Variable rate application of nitrogen in wheat

2008
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Lara Swift (Liebe Group)
Year(s) 2008
Contributor Liebe Group
Trial location(s) East Coorow, WA
Variable rate application of nitrogen in wheat locations
Aims

To evaluate the effect various rates of granular urea spread 3-4 weeks post of seeding has on the yield and profitability of wheat.

Key messages
  • Protein and yield responses may have been impacted by nitrogen residues in the soil from the two previous dry seasons.
  • One treatment of 130kg/ha was also tested, however, due to an error during the harvesting of the trial and there being only one replicate of the treatment, the results have not been included.
Lead research organisation Liebe Group
Host research organisation N/A
Trial funding source GRDC LIE00005
Related program N/A
Acknowledgments

The Liebe Group would like to acknowledge GRDC for funding the project.

Thanks to Rod and Shelly Birch for hosting the trial site and assisting with the seeding, harvesting and implementation of the trial.

Also, thanks to Emma Wilson (formerly Liebe Group) fro initial setup of the trial and the CBH Group for grain analysis.

  • Paper reviewed by Stephen Davies.

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

Method

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

East Coorow 2008

Sow date 13 May 2008
Harvest date Not specified
Plot size 150m x 22m
Plot replication 3
Fertiliser

13/5/08: 50 kg/ha DAPSZC, Post seeding (4-13/6/08): Low 0 kg/ha urea; Moderate 50 kg/ha urea; High 80 kg/ha urea

Herbicide

Pre seeding: 1 L/ha Roundup PowerMAX, 1.8 L/ha Triflurex, 6/6/08: 300 mL/ha Tigrex, 300 mL/ha LVE + LVE MCPA

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Protein (%) Grain yield (t/ha) Hectolitre weight (kg/hL) Screenings (%)
1 0 kg Urea 9.8 4.01 81.26 1.42
2 50 kg Urea 9.5 4.26 81.21 1.24
3 80 kg Urea 9.6 4.18 81.54 1.14

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
East Coorow, WA 0 - 10cm Sandy loam
East Coorow, WA 10 - 30cm Sandy loam
Soil conditions
Trial site Soil texture
East Coorow, WA Sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
East Coorow, WA Hydrosol
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 East Coorow WA
2008 167.2mm
2007 137.5mm
2006 121.0mm
2005 99.3mm
2004 109.5mm
2003 126.9mm
2002 74.6mm
2001 84.2mm
2000 169.5mm
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

East Coorow WA 2008


Observed climate information

Rainfall trial gsr (mm) 230mm

Derived climate information

East Coorow WA

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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 report and links

2008 trial report