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


Research organisaton
Funding source

Trial details

Researcher(s) Ruth Sommerville, Joe Koch, Matt McCallum (UNFS) and John Carey
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
Establishment plants (plants/m2) Seed depth (average) (cm) Grain yield (t/ha)
1 mace wheat No-Till 120 2.8 2.56
2 mace wheat Cultivated January 142 2.8 2.25
3 mace wheat Cultivated April 109 1.7 2.61
4 mace wheat Cultivated January and April 104 3.9 -
5 mace wheat No-Till 108 2.5 2.7
6 mace wheat Cultivated April 116 2.9 2.56
7 mace wheat No-Till 136 3.5 2.51
8 mace wheat Cultivated April 149 2.9 2.46
9 mace wheat No-Till 136 1.9 2.26
10 mace wheat Cultivated April 104 2.8 2.64

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
Trial site Soil order
Site 2, Jamestown, SA Sodosol
National soil grid Source
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.

Individual Trial Project data and information and OFT metadata are licensed under a Creative Commons Attribution 4.0 International License.
The data and information accessed through OFT may also be subject to Terms of Use specified by the Trial Contributor,
in which case the Terms of Use of a Trial Contributor take precedence over other information provided on OFT.
Trial last modified: 27-06-2019 11:39am AEST