Mullewa trials - Round up ready canola varieties and nitrogen rates


Research organisaton

Trial details

Researcher(s) Grant Thompson (Crop Circle Consulting)
Year(s) 2011
Contributor North East Farming Futures
Trial location(s) Eradu, WA
Mullewa trials - Round up ready canola varieties and nitrogen rates locations

To assess the effects of nitrogen rates on roundup ready canola varieties.

Key messages
  • Of the varieties planted, the hybrid variety CB Eclipse provided the highest grain yield per hectare of 2.59 t/ha, and achieved the highest grain value/Ha.
  • The nitrogen treatments showed that providing more than 82N/ha increased grain yield. 108kg/ha N increased yield by approx. 0.3t/ha. The 122kg/ha N rate did not increase grain yield however, suggesting that perhaps this rate was over the top of the Nitrogen response curve. Both the higher N treatments reduced oil content.
  • Hybrid vigour was evident early in both the Eclipse and 502 plots, but was less noticeable at the end of the season.
  • Hyola 502RR had a slightly poorer establishment compared to Eclipse and GT61.
  • Seed Costs are a consideration, with RR hybrids around $28-$30/kg and RR Ops around $16-18/kg.
Lead research organisation North East Farming Futures
Host research organisation N/A
Related program N/A
  • Grant Thompson- Crop Circle Consulting.
  • Pacific Seeds - Justin Kudnig – Oilseeds Specialist – technical support and presentations on Field Day.
  • Hamish Maclean - CBH.
  • Oilseeds of WA- seed supply.
  • Paul and Nino Messina, David Parradella (Bindu Farms) – technical support, seeding, harvesting etc.
  • CBH – grains analysis and canola value calculations.

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


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

Eradu 2011

Sow rate or Target density 3.5 kg/ha
Sow date 15 May 2011
Harvest date Not specified
Plot size Not specified
Plot replication 3
  • 90 kg/ha MacroPro Extra and 40L Flexi N banded at sowing,
  • 100kg NS1 topdressed 10th June,
  • 70L Liqui NS at 12th July,
  • 45L Flexi N at mid Flowering 6th August.
  • 108N strip – as above + 60kg NS61 at 30th June
  • 122N strip - as above + 60kg NS61 at 30th June + 70L LiquiNS 12th August
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Grain yield (t/ha) Oil (%)
1 HYOLA RR502 82N 2.2 44.8
2 ECLIPSE HYB 82N 2.59 44.2
3 GT61 OP 82N 2.29 46.1
4 HYOLA RR502 108N 2.5 42.1
5 HYOLA RR502 122N 2.2 43.1

Grain yield t/ha


Oil %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Eradu, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Eradu, WA Tenosol
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 Eradu WA
2011 222.5mm
2010 162.5mm
2009 179.7mm
2008 216.3mm
2007 171.5mm
2006 161.4mm
2005 168.5mm
2004 170.2mm
2003 182.5mm
2002 160.2mm
2001 140.7mm
2000 212.3mm
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



Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Eradu WA


Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from
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: 25-06-2019 12:14pm AEST