Identifying zones


Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA), BCG Trials Team, James Challis (Precision Agronomics Australia), Simon Craig (BCG, SPAA) and Andrew Whitlock (Precision Agriculture)
Year(s) 2011
Contributor Society of Precision Agriculture Australia
Trial location(s) Site 11, Birchip, VIC
Identifying zones locations
  • To compare the various tools for determining paddock zones.
  • To determine whether thse zones neededt o be managed differently.
Key messages

This demonstration has shown that there are many tools available to help farmers identify paddock zones. In this case, the farmer was easily able to identify roughly each zone, however from the yield map it is apparent that using the yield maps, to get those zones 100%, slight changes were required. There was little advantage in applying fertiliser in any of the zones, however, emergence issues may have confounded some of these responses. Both P tests (Colwell and DGT) indicated that Zone 2 was responsive to P. There appeared to be a slight increase in yield to P. This was indicated visually during the season, though the difference was thought to be greater and unlikely to be significant. Most importantly, this demonstration has highlighted that you don’t need to invest heavily to practice PA and VR. The farmer identified 80-90% of the variation with the help of other tools. Those tools will prove very important when the zones as less pronounced or in paddocks that have been recently acquired.

Lead research organisation Society of Precision Agriculture Australia
Host research organisation N/A
Trial funding source GRDC SPA000010
Related program N/A

This project was funded by the Grains Research and Development Corporation (GRDC)

Other trial partners Cameron Barber (site host)
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Crop type Wheat
Treatment type(s)
  • No treatment: Precision agriculture
Trial type Precision agriculture
Trial design Not applicable

Birchip 2011

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
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Download results

Trial results Table 1

# Treatment 1
Plant available water (mm) Colwell phosphorus (mg/kg)
1 Red clay loam 98 27
2 Red ironstrone 159 19
3 Grey clay loam 117 25

Colwell phosphorus mg/kg


Plant available water mm

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 11, Birchip, VIC Red sandy clay loam
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 11, Birchip, VIC Vertosol
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 11, Birchip VIC

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
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: 23-09-2019 17:23pm AEST