Top dressing canola with urea: amounts and timing

2000
CC BY 4.0

Research organisaton

Trial details

Researcher(s) David Harbison (Hi-Fert Fertilisers)
Ken Motley (NSW Agriculture)
Andrew Rice (CWFS)
Year(s) 2000
Contributor Central West Farming Systems
Trial location(s) Gunning Gap, NSW
Mulyandry, NSW
Wirrinya, NSW
Top dressing canola with urea: amounts and timing locations
Aims

To look at the effectiveness of top-dressed urea on canola and the importance of timing prior to rainfall. 

Key messages

Tor top dressing to be effective on canola the following points are required:

  • It needs to be applied to a crop with marginal soil N levels that has the potential to respond.It must be applied before the crop suffers an unreasonable yield potential loss due to N deficiency.
  • This will usually mean top dressing before stem elongation.
  • The crop also needs good growth conditions after top dressing so that it has potential to provide an economic response.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Related program N/A
Acknowledgments
  • Cooperators: O’Connell family, Bob Wythes and Kim and Wendy Muffett.
  • Technical assistance: Greg Gibson, James Deeves and Tim McNee Trial design and analysis: Remy Van de ven Comments on trial data: Neil Fettell and David Flower.
  • The Central West Farming Systems Group, Oilseeds Research Fund (NSW Grains Board), Grain Growers Association and Hi-Fert Fertilisers funded these trials.

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

Method

Crop type Canola
Treatment type(s)
  • Fertiliser
Trial type
Trial design

Gunning Gap 2000

Sow date 10 May 2000
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Mulyandry 2000

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

Wirrinya 2000

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 Gunning Gap site results

# Treatment 1
Oil (%) Grain yield (t/ha) Protein (%)
1 Nil 47.6 2.72 21.1
2 50 kg N/ha @ sowing 47.3 2.84 22.4
3 50 kg N/ha on 9-Aua 47.1 2.89 22.9
4 50 kg N/ha on 31-Jul 47.3 3.01 22.7
5 100 kg N/ha @ sowing 46.1 2.77 23.7
6 100 kg N/ha on 9_Aua 46.4 2.91 24.2
7 100 kga N/ha on 31-Jul 47.4 2.94 24.1
8 100 kg N/ha @ sowing and 9-Aua 47.9 2.91 23.7
9 100 kg N/ha @ sowing and 31-Jul 47.6 2.95 23.8

Grain yield t/ha


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Oil %


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Protein %


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Trial results Muy

# Treatment 1
Oil (%) Grain yield (t/ha) Protein (%)
1 Nil 47.6 2.72 21.1
2 50 kg N/ha @ sowing 47.3 2.84 22.4
3 50 kg N/ha on 9-Aua 47.1 2.89 22.9
4 50 kg N/ha on 31-Jul 47.3 3.01 22.7
5 100 kg N/ha @ sowing 46.1 2.77 23.7
6 100 kg N/ha on 9_Aua 46.4 2.91 24.2
7 100 kga N/ha on 31-Jul 47.4 2.94 24.1
8 100 kg N/ha @ sowing and 9-Aua 47.9 2.91 23.7
9 100 kg N/ha @ sowing and 31-Jul 47.6 2.95 23.8

Grain yield t/ha


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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
Mulyandry, 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
Mulyandry, NSW Sodosol
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

Mulyandry NSW

Wirrinya NSW

Gunning Gap NSW

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Mulyandry 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 14:17pm AEST