Nitrogen response

CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA)
Charlton Jeisman (SPAA)
Sean Mason (SPAA)
Sam Trengove (SPAA)
Year(s) 2010
Contributor Society of Precision Agriculture Australia
Trial location(s) Appila, SA
Nitrogen response locations

To compare the effects of different nitrogen rates and soil types on wheat production and to extend information to local growers and identify where savings can be made.

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. The grower mentioned the usefulness of the Greenseeker map to provide a visual overview of how the crop was growing and where nitrogen was being used. This has helped with understanding how different soil types perform and allow extraction of nitrogen during a growing season.

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 the Northern and Yorke Natural Resources Management Board

Other trial partners GRDC, Northern and Yorke Natural Resources Management Board.
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

Appila 2010

Sow date Late May 2010
Harvest date Not specified
Plot size 150m x 100m
Plot replication Not specified


Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Grain yield (t/ha)
1 0kg/ha urea 2.86
2 60kg/ha urea applied at GS31 3.62
3 100kg/ha urea applied at sowing 3.98

Grain yield t/ha

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Appila, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Appila, SA 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 Appila SA
2010 616.6mm
2009 610.2mm
2008 589.7mm
2007 600.7mm
2006 577.6mm
2005 606.9mm
2004 596.2mm
2003 577.2mm
2002 553.4mm
2001 591.0mm
2000 543.6mm
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.

Appila SA

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 last modified: 23-09-2019 17:25pm AEST