Splitting of nitrogen in medium-high rainfall canola

2015

Research organisaton
Funding source

Trial details

Researcher(s) Raj Malik
Mark Seymour
Year(s) 2015
Contributor Department of Agriculture and Food WA
Trial location(s) Gibson, WA
Splitting of nitrogen in medium-high rainfall canola locations
Aims

To investigate the response to changing the nitrogen rate and changing the time of application.  Canola yield and oil will be measured and RR hybrids will be compared with open-pollinated TT types (OP TT).

Key messages

In this 2015 trial;

  • Economic response plateaued at 75 kg N/ha – lower than grain yield (125 kg N/ha)
  • Nitrogen applications at 12 and 14 weeks produced similar canola responses to N applied earlier in the year – but no added benefit.
  • OP TT and hybrid RR varieties had a similar response to nitrogen timing and rate.

 

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 WA as part of the GRDC/DAFWA co-funded project “Tactical Break Crop Agronomy in Western Australia”.  Thanks to the Esperance RSU for trial management.  Pam Burgess (DAFWA. Esperance) provided technical assistance to ensure all treatments and measurements occurred in a timely and accurate fashion.


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 Replicated

Gibson 2015

Sow rate or Target density 30 plants/m²
Sow date 28 April 2015
Harvest date Not specified
Plot size Not specified
Plot replication 3
Paddock history Paddock rotation: Cereal 2014, Canola 2013, Sub-clover Pasture 2011 and Sub-clover Pasture 2010.
Fertiliser

Fertiliser: 400 kg/ha of gypsum (17% Ca, 14% S) top-dressed over whole paddock in late March. 100 kg/ha of Superphos at seeding, 200 kg/ha of Muriate of Potash top-dressed over whole site 4 June, 4 kg MnSO4/ha sprayed on 29th July, and 1 kg ZnSO4 sprayed on 4th August.

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
Gibson, WA Gravelly sand
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Gibson, 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 Gibson WA
2015 546.1mm
2014 542.9mm
2013 557.8mm
2012 553.5mm
2011 549.1mm
2010 540.9mm
2009 552.3mm
2008 551.0mm
2007 554.9mm
2006 539.7mm
2005 545.9mm
2004 549.4mm
2003 566.0mm
2002 539.6mm
2001 548.2mm
2000 548.5mm
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

Gibson WA 2015


Observed climate information

Rainfall avg gsr (mm) 320mm

Derived climate information

Gibson 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 last modified: 04-09-2017 15:06pm AEST