Urea topdressing: importance of timing prior to rainfall, and benefits of Agritain treatment

1999
CC BY 4.0

Research organisaton

Trial details

Researcher(s) Ken Motley (NSW Agriculture)
Andrew Rice (CWFS)
Year(s) 1999
Contributor Central West Farming Systems
Trial location(s) Gunning Gap, NSW
Wirrinya, NSW
Urea topdressing: importance of timing prior to rainfall, and benefits of Agritain treatment locations
Aims

To further investigate the impact of rainfall timing on the effectiveness of topdressed urea N uptake, and
the possible role of Agritain-treated urea to overcome the problems with the timing of topdressing.

Key messages
  • Agntain was found to provide little benefit for increasing canola yield. Agritain may have a role in reducing urea toxicity to germinating seeds, when crop seeds are sown close to pre-applied urea (especially when large amounts of N are used).
  • This warrants further investigation.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Related program N/A
Acknowledgments

Trial cooperators: Tom Dwyer and Kim Muffet.
Supply of Agritain: Parkes Prescription Farming Centre (Pivot).
Technical assistance: Greg Gibson, Trevor Russel, Neil Durning and James Deeves.
Trial design and analysis: Neil Fettel and Helen Nicol.
Grain quality analysis: PWA Grower Services and NSW Agriculture Oilseeds Lab.


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

Method

Crop types Wheat
Canola
Treatment type(s)
  • Crop
  • Fertiliser
  • Fertiliser: Timing
Trial type
Trial design

Gunning Gap 1999 Wheat

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

Gunning Gap 1999 Canola

Sow date 14 May 1999
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Wirrinya 1999 Wheat

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

Wirrinya 1999 Canola

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 Canola at Gunning Gap

# Treatment 1
Treatment 2
Treatment 3
Protein (%) Oil (%)
1 NA Nil 37.8 39.4
2 50 urea,0 Sowing 50 38.4 37.3
3 50 agritain.O Sowing 50 39.9 37.8
4 0,50 urea poor time 29-Jul 50 38.5 36.7
5 0.50 urea on time 26-Auq 50 40.7 36.9
6 0.50 agritain poor time 29-Jul 50 39 37.7
7 0.50 agritain on time 26-Auq 50 39.7 37.1
8 100 urea,0 Sowing 100 40.8 37.3
9 0,100 urea on time 26-Auq 100 41.2 36.3
10 50.50 urea poor time Sow and 29-Jul 50 + 50 39.2 36.2
11 50.50 urea on time Sow and 26-Aug 50 + 50 39.2 35.1

Oil %


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Protein %


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Trial results Wheat at Gunning Gap

# Treatment 1
Treatment 2
Treatment 3
Protein (%) Oil (%)
1 NA Nil 3.4 13.07
2 50 urea,0 Sowing 50 4.1 13.17
3 50 agritain,0 Sowing 50 3.5 13.27
4 0.50 urea poor time 29-Jul 50 3.3 13.3
5 0,50 urea on time 26-Aug 50 3.3 13.27
6 0,50 agritain Door time 29-Jul 50 3.4 13.3
7 0,50 agritain on time 26-Auq 50 4 13.4
8 100 urea,0 Sowing 100 3 13.43
9 0.100 urea Door time 29-Jul 100 3.5 13.47
10 0,100 urea on time 26-Aug 100 3 13.7
11 50,50 urea poor time 29-Jul 50 + 50 3.9 13.37
12 50.50 urea on time 26-Aug 50 + 50 3.5 13.43

Oil %


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Protein %


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Trial results Canola at Wirrinya

# Treatment 1
Treatment 2
Treatment 3
Protein (%) Oil (%)
1 Nil 37.8 40.6
2 50 urea ,0 Sowing 50 38.7 40.7
3 50 agritain,0 Sowing 50 40.6 39.8
4 0,50 urea poor time 2-Aug 50 39.1 39.6
5 0,50 urea on time 26-Auq 50 38.9 40.3
6 0.50 agritain poor time 2-Aug 50 39.5 39.2
7 0,50 aqritain on time 26-Auq 50 39.2 40.1
8 100 urea, 0 Sowing 100 40.6 38.5
9 0,100 urea poor time 2-Aua 100 41.3 38.9
10 0,100 urea on time 26-Aug 100 41 38.6
11 50,50 urea poor time Sowing and 2-Auq 50 + 50 42.2 38
12 50,50 urea on time Sowing and 26-Auq 50 + 50 41.6 39.1

Oil %


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Protein %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Gunning Gap, NSW Not specified
Wirrinya, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Gunning Gap, NSW Chromosol
Wirrinya, NSW Vertosol
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.

Gunning Gap NSW

Wirrinya NSW

Gunning Gap NSW

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Wirrinya NSW

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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 14:38pm AEST