The interaction between stubble height and light interception in canola


Research organisaton
Funding source

Trial details

Researcher(s) Nick Poole (FAR Australia)
Michael Straight (FAR Australia)
Year(s) 2017
Contributor Riverine Plains
Trial location(s) Rennie, NSW
The interaction between stubble height and light interception in canola locations
Not specified
Key messages

When canola was sown into wheat stubble in an east-west direction, long stubble (42cm) significantly reduced photosynthetically active radiation (PAR) and reduced true leaf number up to mid-winter.

Although there were trends suggesting a reduction in dry matter (DM) production at the yellow bud stage (GS3.7) as a result of increasing stubble height, the differences were not statistically significant.

The average canola yield of the trial was 1.58t/ha with no significant differences in either yield or oil content due to stubble height of the previous wheat crop.

The results mirror a trial conducted at Dookie, where yields in long stubble were 3.70t/ha and 3.75t/ha in short stubble. At this site there were significant reductions in DM production early in the season in the long stubble treatment.

Lead research organisation Riverine Plains
Host research organisation Riverine Plains
Trial funding source GRDC RPI00009
Related program N/A

This work was carried out as part of the GRDC investment Maintaining profitable farming systems with retained stubble in the Riverine Plains region (2013–18).
Thank you to our farmer co-operators, the Davis family of Rennie.

Other trial partners Foundation for Arable Research Australia (FAR Australia)
Download the trial report to view additional trial information


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

Rennie 2017

Sow date 2 May 2017
Harvest date 21 November 2017
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: GS1.04 @T2: GS3.7 @T3: GS6.7
# Treatment 1
Yield (t/ha) Oil (%) Canola establishment (plants/m2) Dry matter (t/ha) Dry matter (t/ha)
1 Short (12cm) 1.57 46.1 34 2.17 6.95
1 Medium (21cm) 1.47 46.6 37 1.9 6.81
1 Long (42cm) 1.69 45.6 35 1.88 6.85

Canola establishment plants/m2


Dry matter t/ha


Oil %


Yield t/ha

Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Rennie, NSW 0 - 10cm 26.00
Rennie, NSW 0 - 100cm 109.00
Soil conditions
Trial site Soil texture
Rennie, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Rennie, NSW 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 Rennie NSW
2017 387.7mm
2016 402.3mm
2015 383.3mm
2014 384.0mm
2013 378.7mm
2012 421.6mm
2011 480.2mm
2010 543.9mm
2009 492.9mm
2008 468.8mm
2007 464.2mm
2006 458.2mm
2005 478.5mm
2004 451.4mm
2003 487.9mm
2002 497.5mm
2001 536.8mm
2000 509.0mm
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



Rennie NSW 2017

Observed climate information

Rainfall trial gsr (mm) 270mm

Derived climate information

Rennie NSW


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: 19-12-2018 13:19pm AEST