Sowing direction and row spacing for brome grass management in the Mallee

CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Kelly Angel (BCG)
Year(s) 2016
Contributor Central West Farming Systems
Trial location(s) Jil Jil, VIC
Sowing direction and row spacing for brome grass management in the Mallee locations

To determine if sowing direction and row spacing can be used to reduce grass weed populations, growth and seed set, and their impact on crop performance in the Mallee.

Key messages
  • Light interception at midday was significantly higher under east-west sowing compared with north-south.
  • It is plausible that sowing direction may influence weed seed set.
  • To establish a competitive crop against weeds and maximise yields, growers should aim for the
    narrowest row spacing to suit their system.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Trial funding source GRDC CWF00020
Related program N/A

This research was funded by the GRDC as part of the Overdependence on Agrochemicals project

Other trial partners BCG
Download the trial report to view additional trial information


Crop type Wheat
Trial type Experimental
Trial design Replicated

Jil Jil 2016

Sow rate or Target density 130 plants/m2 Grenade CL Plus wheat
Sowing machinery

Knife points, press wheels

Sow date 5 May 2016
Harvest date 15 December 2016
Plot size Not specified
Plot replication Not specified

Granulock Supreme Z @ 70kg/ha at sowing

Urea @ 70kg/ha at GS32

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Grain yield (t/ha)
1 225 row spacing 3.8
2 305 row spacing 3.6
3 380 row spacing 3.5

Grain yield t/ha

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Jil Jil, VIC Sandy clay loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Jil Jil, VIC Calcarosol
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 Jil Jil VIC
2016 786.5mm
2015 769.7mm
2014 780.3mm
2013 773.8mm
2012 806.6mm
2011 826.0mm
2010 819.3mm
2009 788.3mm
2008 776.6mm
2007 783.5mm
2006 798.0mm
2005 826.8mm
2004 786.0mm
2003 808.0mm
2002 746.6mm
2001 782.2mm
2000 736.0mm
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



Jil Jil VIC 2016

Observed climate information

Rainfall avg gsr (mm) 373mm

Derived climate information

Jil Jil VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate

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: 25-04-2018 07:47am AEST