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Timing of nitrogen for canola grown in the high rainfall areas of Western Australia

2014

Research organisation
Funding source
Department of Agriculture and Food WA
<abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Raj Malik
Year(s) 2014
Contributor Department of Agriculture and Food WA
Trial location(s) Kojonup-West, WA
Timing of nitrogen for canola grown in the high rainfall areas of Western Australia locations
Aims

To investigate the effect of nitrogen rates and time of application on grain yield, oil and gross margins of Roundup Ready, Triazine Tolerant and Clearfield canola.

Key messages

In this 2014 trial at Kojonup-West:

  • Canola grain yield and gross margins were more dependent on nitrogen rates than the application timings.
  • There was no effect of delayed nitrogen application on grain yield or gross margins up to 100 kg N/ha.
  • At 125 kg N/ha, a significant yield and gross margins reduction was observed when nitrogen was applied as a 3-way split (50 kg within 8 weeks, 50 kg/ha at 12 and 25 kg/ha at 16 weeks after seeding) compared to when all of the nitrogen was applied within 8 weeks of seeding.
Lead research organisation Department of Agriculture and Food WA
Host research organisation N/A
Trial funding source GRDC DAW00227
Related program N/A
Acknowledgments

This trial is one of a series conducted throughout Western Australia as part of the GRDC/DAFWA co-funded project “Tactical Break Crop Agronomy in Western Australia”.  Thanks to Ben Webb for hosting the trial and to the Katanning RSU for trial management. 
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Fertiliser : Rate
  • Fertiliser : Timing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Kojonup-West 2014

Sow rate or Target density 40 plants/m²
Sow date 14 May 2014
Harvest date Unknown
Plot size Not specified
Plot replication 3
Fertiliser

Fertiliser (kg/ha):  100 kg/ha of Superphos at seeding, 120 kg/ha of Muriate of Potash and 400 kg/ha of gypsum (17% Ca, 14% S) topdressed over whole site 4 weeks after seeding.
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Kojonup-West, WA Loamy sand
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Kojonup-West, WA Sodosol
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 Kojonup-West WA
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Climate

Kojonup-West WA 2014

Observed climate information

Rainfall avg gsr (mm) 400mm

Derived climate information

Kojonup-West 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

2014 trial report



Trial last modified: 14-01-2023 23:15pm AEST