Using different rates of fertiliser over three different soil types at Cocata

CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA)
Linden Masters (SPAA)
Steve McCormick (SPAA)
Damien Mullan (owner of site)
Peter Trelor (Precision AG Services)
Year(s) 2010
Contributor Society of Precision Agriculture Australia
Trial location(s) Ucontichie, SA
Using different rates of fertiliser over three different soil types at Cocata locations

To compare the effects varying fertiliser rates on three different soil types and to compare fertiliser rates, Nil, replacement, standard and high.

Key messages

The objective of this GRDC / SPAA funded project is to increase the level of adoption of PA 'beyond guidance' by broadacre farmers. The project specifically aims to increase the level of adoption of variable rate (VR) by growers in the project to 30% by 2013.This goal will be achieved by demonstrating how to use PA tools to growers at a regional level and by increasing the skills of growers and industry in PA to a level where they can then use PA tools in their farming systems to achieve economic, environmental and social benefits.

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) and run in conjunction with EPARF and SARDI Minnipa Agricultural Centre

Other trial partners GRDC, EPARF, SARDI Minnipa Agricultural Centre.
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Fertiliser: Rate
Trial type Precision agriculture
Trial design Not applicable

Ucontichie 2010

Sow rate or Target density Wheat was sown @ 60 kg/ha
Sowing machinery

2.8 ha (7 acres) per strip

Sow date Not specified
Harvest date 6 January 2010 6 January 2010
Plot size Not specified
Plot replication 2

Urea placed below the seed at seeding @ 50 kg/ha

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Protein (%) Grain yield (t/ha)
1 Nil phosphurs/nil 8.3 1.42
2 Replacement - 40kg 18:20 + 30kg Urea 9.7 2.63
3 Standard - 60kg 18:20 + 30 kg Urea 10.3 2.67
4 High - 80kg 18:20 + 30 kg Urea 10.6 2.71

Grain yield t/ha


Protein %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Ucontichie, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Ucontichie, SA Calcarosol
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 Ucontichie SA
2010 208.2mm
2009 220.1mm
2008 169.4mm
2007 171.2mm
2006 188.8mm
2005 177.8mm
2004 176.6mm
2003 185.8mm
2002 176.3mm
2001 211.3mm
2000 209.6mm
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.

Ucontichie SA

CAUTION: Trial site locality unknown; Climate data sourced from Society of Precision Agriculture Australia 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: 30-09-2019 15:54pm AEST