Maintaining profitable farming systems with retained stubbles in the Upper North of SA


Research organisaton
Funding source

Trial details

Researcher(s) John Carey (UNFS)
Joe Koch (UNFS)
Matt McCallum (UNFS)
Ruth Sommerville (UNFS)
Year(s) 2014
Contributor Upper North Farming Systems
Trial location(s) Site 2, Jamestown, SA
Maintaining profitable farming systems with retained stubbles in the Upper North of SA locations

To demonstrate whether current seeder set ups within the region are capable of successfully sowing wheat into a pasture with no-till. 

Key messages
  • On average, the no-till and the April cultivated treatments had similar plant numbers and average sowing depth.
  • However, the range in seed depth appeared to be less where there was cultivation prior to sowing.
  • This would indicate that the tynes were under more pressure in no-till, and more tyne movement resulted in a greater variation in seed depth.
  • Conversely, where the soil was cultivated prior to sowing, the tynes were likely to be under less pressure resulting in a more even seed placement.
Lead research organisation Upper North Farming Systems
Host research organisation Upper North Farming Systems
Trial funding source GRDC
Related program Maintaining profitable farming systems with retained stubble

Ruth Sommerville, Joe Koch, Matt McCallum and John Carey

Other trial partners Not specified


Crop type Wheat
Treatment type(s)
  • Stubble: Management
Trial type Demonstration
Trial design Unreplicated

Jamestown 2014

Sow rate or Target density 75kg/ha
Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication 1

sowing: 32:10 @ 120kg/ha


Pre-Em: 1.3l/ha Tifluralin

Download results

Trial results Table 1

# Variety
Treatment 1
Grain yield (t/ha) Establishment plants (plants/m2) Seed depth (average) (cm)
1 mace wheat No-Till 2.56 120 2.8
2 mace wheat Cultivated January 2.25 142 2.8
3 mace wheat Cultivated April 2.61 109 1.7
4 mace wheat Cultivated January and April - 104 3.9
5 mace wheat No-Till 2.7 108 2.5
6 mace wheat Cultivated April 2.56 116 2.9
7 mace wheat No-Till 2.51 136 3.5
8 mace wheat Cultivated April 2.46 149 2.9
9 mace wheat No-Till 2.26 136 1.9
10 mace wheat Cultivated April 2.64 104 2.8

Grain yield t/ha


Establishment plants plants/m2


Seed depth (average) cm

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 2, Jamestown, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 2, Jamestown, SA 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 Site 2, Jamestown SA
2014 627.3mm
2013 627.3mm
2012 650.2mm
2011 658.4mm
2010 654.0mm
2009 638.7mm
2008 610.6mm
2007 614.5mm
2006 614.9mm
2005 621.3mm
2004 580.3mm
2003 560.2mm
2002 558.8mm
2001 571.8mm
2000 513.6mm
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.

Site 2, Jamestown SA

CAUTION: Trial site locality unknown; Climate data sourced from Upper North Farming Systems office location

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: 27-06-2019 11:39am AEST