Soil pH mapping

CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA)
Fiona Hart (Riverine Plains)
Andrew Whitlock (Precision Agriculture)
Year(s) 2011
Contributor Society of Precision Agriculture Australia
Trial location(s) Yarrawonga , VIC
Soil pH mapping locations

To compare soil pH mapping with VERIS Soil pH Detector against EM38 zones and satellite imagery

Key messages

When comparing the soil pH map against the EM38 map we found that there were some similar trends, especially in the alkaline zone in the south east of the paddock which lines up partially to the high EM38 readings (clay soil). However, the difference between the two maps is significant in terms of creating lime The greatest lime savings through the soil pH mapping approach have occurred on paddocks which are considered to be in a maintenance phase. That is, paddocks which have had a reasonable lime history and only require strategic lime applications. Savings on these paddocks tends to range between 35 – 65%. Other farmers who have previously implemented variable rate lime are also using the grid soil pH mapping service to measure how effective the variable rate application was. The subsequent map is then used to apply a maintenance rate of lime.

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 Adam Inchbold (cooperating farmer)
Download the trial report to view additional trial information


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

Yarrawonga 2011

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Soil amelioration


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
Yarrawonga , VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Yarrawonga , VIC Sodosol
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 Yarrawonga VIC
2011 610.5mm
2010 620.2mm
2009 574.8mm
2008 573.9mm
2007 547.7mm
2006 557.7mm
2005 594.9mm
2004 556.8mm
2003 521.9mm
2002 490.6mm
2001 509.9mm
2000 480.2mm
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.

Yarrawonga 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.

Trial report and links

2011 trial report

Trial last modified: 30-09-2019 15:18pm AEST