Influence of seeding systems and stubble management on pre-emergent herbicides


Research organisaton
Funding source

Trial details

Researcher(s) Sam Kleemann, Gurjeet Gill (University of Adelaide), Sarah Noack and Peter Hooper (Hart Field Site Group)
Year(s) 2015
Contributor Hart Field Site Group
Trial location(s) Site 5, Hart, SA
Influence of seeding systems and stubble management on pre-emergent herbicides locations

To evaluate the effect of crop stubble management and seeding system on pre-emergent herbicide behaviour and crop safety.

Key messages
  • Pre-emergent herbicides can cause crop damage. Separation of the herbicide from crop seed is essential for crop safety, which is more easily achieved in knife-point & press wheel seeding systems but considerably more difficult with low soil disturbance single discs.
  • Crop stubble can intercept & bind pre-emergent herbicides, which affects crop safety & herbicide efficacy. Low solubility herbicides such as trifluralin have a tendency to bind strongly to crop residues, which reduces the potential for crop damage but also limits its ability to provide effective weed control in situations with heavy stubble load.
  • Choose the right herbicide for the job – not all pre-emergent herbicides behave the same so follow label recommendations closely.
Lead research organisation Hart Field Site Group
Host research organisation Hart Field Site Group
Trial funding source SAGIT
Related program N/A

The financial assistance of SAGIT (South Australian Grain Industry Trust) is gratefully acknowledged (H113). We also wish to thank Matt Dare, Tom Robinson and Pete McEwin for their assistance in trial preparation and implementation, and field staff from SARDI (Clare office) for providing technical support.


Other trial partners The University of Adelaide
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Herbicide
  • Herbicide: Timing
  • Sowing
  • Sowing: Method
  • Stubble
  • Stubble: Management
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Hart 2015

Sow rate or Target density 100 kg/ha Mace wheat
Sow date 3 June 2015
Harvest date Not specified
Plot size 10m x 12m
Plot replication Not specified
  • DAP/urea (22:14) @ 100 kg/ha at seeding
  • Urea/SOA (33:00:00:11) @ 100 kg/ha 21st June
  • Urea (46:00) @ 80 kg/ha 31st July
Download the trial report to view additional method/treatment information
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
Site 5, Hart, SA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 5, Hart, SA Chromosol
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 5, Hart SA


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: 06-06-2019 15:39pm AEST