Irrigation Discussion Group Focus Paddock - Impact of nitrogen on irrigated wheat

2020

Research organisatons
Funding source

Trial details

Researcher(s) Bendan Wallis
Contact email charlie.aves@irrigatedcroppingcouncil.com.au
Contact phone 0416400979
Year(s) 2020
Contributor Irrigated Cropping Council
Trial location(s) Francis 2020,
Irrigation Discussion Group Focus Paddock - Impact of nitrogen on irrigated wheat locations
Aims

To assess the strategic use of nitrogen in the form of urea totarget 10t/ha spring wheat yield under irrigation.

Key messages

From the addition of nitrogen at high rates, we have found that yield and grain quality can be influenced. There is also a threshold where nitrogen can be overdone. Based on the results from this demonstration, it appeared that all treatments with a GS37 application of N had a lower test weight as well as higher level of screenings and protein. In most instances this was a significant difference.

The best overall economic return form the use of nitrogen was 200kg/ha applied following seeding, then a top-up 100kg/ha at GS30. Giving a total application of 300kg urea. 

Lead research organisation Irrigated Cropping Council
Host research organisation MacKillop Farm Management Group
Trial funding source GRDC ICF1906-002RTX
Related program N/A
Acknowledgments
  • Kalyx for harvesting the demonstration and conducting grain quality analysis.
  • Beau and Tyrone Scullion as co-operating growers

Other trial partners Pinion Advisory
Download the trial report to view additional trial information

Method

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

Francis 2020 2020

Sow date 17 May 2020
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser

The demonstration was conducted in 2020 using seven different rates of N, which was applied at three key timings through the production season. This is outlined below

 

Timing 1 - Seeding

Timing 2 - GS 30

Timing 3 - GS 37

Total Urea

Treatment 1

0kg/ha&

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Download results

Trial results Table 1

# Treatment 1
Gross margin ($/ha) Gross income ($/ha) Grade (grade) Grain yield (t/ha) Cost ($/ha)
1 1 - 0kg/ha Urea 1850.73 1850.73 APW 6.73 0
2 2 - 100kg/ha Urea @GS37 1910.26 1980.26 APW 7.201 70
3 3 - 100 kg/ha Urea @GS00 + 100kg/ha @GS30 2068.93 2208.93 H2 7.974 140
4 4 - 200kg/ha Urea @ GS00 + 100kg/ha @GS30 2106.25 2291.25 H2 8.272 185
5 5 - 100kg/ha @ GS00 + 200kg/ha @GS30 + 200kg/ha @GS37 2013.79 2313.79 AUH2 8.57 300
6 6 - 200kg/ha @GS00 + 200kg/ha @GS30 + 200kg/ha @GS37 1969.58 2314.58 AUH2 8.573 345
7 7 - 200kg/ha @GS30 + 200kg/ha @GS37 2021.95 2251.95 AUH2 8.341 230
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Francis 2020, Not specified
Derived trial site soil information
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.

Francis 2020

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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

2020 trial report



Trial last modified: 23-05-2023 11:41am AEST