Using PA to improve efficiency of soil amelioration


Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA), Rural Solutions SA, Cummins Ag Services, LEADA and Precision AgServices, Kieran Wauchope, Marty Chandler, Peter Treloar and Michael WellsKieran Wauchope (RSSA, LEADA)
Year(s) 2011
Contributor Society of Precision Agriculture Australia
Trial location(s) Site 4, Edillilie, SA
Using PA to improve efficiency of soil amelioration locations
  • To determine if precision ag tools can improve the efficiency of soil amelioration as well as assess the effectiveness of amelioration techniques.
  • To compare delving, spading and gypsum to improve sodic and bleached soils.
Key messages

A yield increase is apparent in figures 2 (circled) and 3 (see attached Trial report) at the ripped only treatment in the eastern plot, however this is not seen in the western plots and does not stand out in graph 1. Results presented in Graph 1 generally show only slight differences with the greatest response observed in the gypsum only treatment on the eastern plots. This soil was highly sodic at 10cm and as could be expected the gypsum would make a quicker impact on sodicity, thus allowing for improved drainage that may have improved crop production. Gypsum would take longer to impact on subsoil sodicity and may show a response after several years of data are collected

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 Caring for Our Country and State NRM Community Grants

Other trial partners Peter and Brett Mickan (Property owner)
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Soil amelioration: Type
Trial type Precision agriculture
Trial design Not applicable

Edillilie 2011

Sow rate or Target density 100 kg/ha
Sow date 10 March 2011 10 March 2011
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

140 kg/ha Urea

Soil amelioration

Gypsum at 2.5 t/ha, disced and spading with gypsum at 2.5t/ha, ripping plus gypsum at 2.5 t/ha, a control and ripping plus spading with gypsum at 2.5 t/ha.

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Treatment 2
Electrical conductivity (dS/m)
1 South P1 site 0-10 cm depth 0.12
2 South P1 site 10-30 cm depth 0.04
3 South P1 site 30-70 cm depth 0.32
4 South P1 site 70-90 cm depth 0.48
5 South Y1 site 0-10 cm depth 0.08
6 South Y1 site 10-30 cm depth 0.04
7 South Y1 site 30-70 cm depth 0.05
8 South Y1 site 70-90 cm depth 0.05
9 South G1 site 0-10 cm depth 0.05
10 South G1 site 10-30 cm depth 0.04
11 South G1 site 30-70 cm depth 0.16
12 South G1 site 70-90 cm depth 0.28

Electrical conductivity dS/m

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 4, Edillilie, SA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 4, Edillilie, 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 4, Edillilie 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.

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Trial last modified: 30-09-2019 15:55pm AEST