Cereal response to stubble treatments in Central Western NSW


Research organisaton
Funding source

Trial details

Researcher(s) Helen McMillan (CWFS): Co-operator, Ian Leulf
Year(s) 2016
Contributor Central West Farming Systems
Trial location(s) Weethalle, NSW
Cereal response to stubble treatments in Central Western NSW locations

To investigate the impact that stubble treatments (burning, cultivation, harrowed/flattened or standing stubble) imposed towards the end of the fallow have on the yield of winter crops.

Key messages

Key Points from 2016
 Burning or cultivating 2015 stubbles tended to produce higher yields, however this was only significant at Ungarie.
 High rainfall and a soft finish removed the benefit of stored soil moisture that stubble retained systems may have provided.
 Nitrogen was the limiting factor for both yield and protein for 2016.

Key Points from the Stubble Initiative
 Growers cannot let stubble negatively impact on weed control and timely sowing.
 Growers should use crop rotation to their advantage by aiming to sow the right crop into the least antagonistic stubble.
 Stubble retained systems can require more nitrogen due to increased nitrogen tie-up.

Lead research organisation Central West Farming Systems
Host research organisation N/A
Trial funding source GRDC CWF00018
Related program Maintaining profitable farming systems with retained stubble

CWFS would like to acknowledge the support provided by the co-operating farmers, without their in-kind support the trials would not have been possible. The author also thanks Neil Fettell for his support in compiling this report. Lastly CWFS would like to acknowledge the GRDC for their generous support for research in the grains industry.

Other trial partners Not specified
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Crop type Barley
Treatment type(s)
  • Stubble
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Weethalle 2016

Sow rate or Target density Scope barley
Sow date 23 May 2016
Harvest date 23-11-2016
Plot size 10m x 40m
Plot replication Not specified

35 kg/ha MAP, 30 kg/ha urea

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Download results

Trial results Table 1

# Treatment 1
Screenings (%) Biomass (kg/ha) Grain yield (t/ha) Protein (%)
1 Burnt 3.31 319 2.61 7.18
2 Cultivated 3.08 241 2.61 7.4
3 Harrowed 3.54 238 2.46 7.28
4 Standing 3.02 235 2.29 7.2

Grain yield t/ha


Biomass kg/ha


Protein %


Screenings %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Weethalle, NSW Red sandy loam
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Weethalle, NSW Kandosol
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.

Weethalle NSW

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 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.

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Trial last modified: 22-04-2019 14:39pm AEST