Soil type specific nitrogen responses


Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA) and Michael Moodie (MSF)
Year(s) 2011
Contributor Society of Precision Agriculture Australia
Trial location(s) Site 4, Ouyen, VIC
Soil type specific nitrogen responses locations
  • To use PA maps to identify and sample soil zones within a paddock.
  • To identify potential soil specific nitrogen responses within paddocks.
  • To compare different nitrogen fertiliser products.
Key messages

While all soil types responded to nitrogen, the response and profitability of nitrogen application varied between soil zones. Using the Urea/SOA treatment as an example, for the loam and swale soil types, the additional profit compared to no in-season N was approximately $50/ha. However, applying additional fertiliser to the dune soil was twice as profitable (approximately $100/ha). As input costs were standard across all soil types (i.e. an N Rich strip with the equivalent rate of N was used for all treatments), profitability was driven by the increase in yield. As fertiliser efficiency was below its potential for the loam and swale soils (and at potential for the dune soil), it is possible that the same yield response could have been achieved with less fertiliser, therefore these two soil zones could have been more profitable if less nitrogen was applied.

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 Scott and Vanessa Anderson (site hosts)
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Crop type Wheat
Treatment type(s)
  • Fertiliser: Type
  • Soil: Type
Trial type Precision agriculture
Trial design Not applicable

Ouyen 2011

Sow rate or Target density VR 60-75 kg/ha
Sow date 18 May 2011 18 May 2011
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

DAP/SOA 50-80 kg/ha VR at sowing

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Download results

Trial results Table 1

# Variety
Treatment 1
Plant available water (mm) Soil N (mg/kg)
1 Gladius Swale 95 112
2 Gladius Loam/limestone ridge 132 62
3 Gladius Dune 126 32

Plant available water mm


Soil N mg/kg

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 4, Ouyen, VIC Brown sandy loam over limestone
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 4, Ouyen, VIC Calcarosol
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, Ouyen VIC


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 15:53pm AEST