Time of sowing and ryegrass management

CC BY 4.0

Research organisatons

Trial details

Researcher(s) N/A
Year(s) 2014
Contributor Lower Eyre Agricultural Development Association
Trial location(s) Wanilla, SA
Time of sowing and ryegrass management locations

To investigate proactive non-herbicide management strategies for reducing ryegrass seed set and so 'run down' the seed bank.

Key messages
  • Early sowing of barley may be an effective way of controlling ryegrass growth and limiting seed set.
  • Results in wheat are more variable than for barley: at Wanilla, mid-May seemed the optimal time of sowing to reduce ryegrass with less effect obvious at Yeelanna.
  • Higher seeding rates also followed the same trend, with little ryegrass suppression benefit seen in wheat but a benefit evident in barley.
  • Increasing seeding rate did not improve wheat yields significantly however barley (Fleet) did seem to benefit from higher seeding rates when sown late (mid-June).
Lead research organisation Grains Research and Development Corporation
Host research organisation N/A
Related program Maintaining profitable farming systems with retained stubble

Thankyou to the Wilksch family for hosting the site

Other trial partners SARDI


Crop type Cereal (Grain): Wheat
Trial type
Trial design

Wanilla 2014

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Psuedoreplication Not specified
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
Wanilla, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Wanilla, SA 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 Wanilla SA
2014 500.2mm
2013 472.0mm
2012 495.1mm
2011 562.3mm
2010 558.4mm
2009 503.4mm
2008 496.0mm
2007 512.0mm
2006 536.0mm
2005 476.5mm
2004 466.8mm
2003 494.9mm
2002 463.2mm
2001 503.6mm
2000 523.6mm
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.

Wanilla SA


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

No trial reports or attachments found

Trial last modified: 06-08-2019 07:54am AEST