Precision agriculture demonstrations on variable rate applications of nitrogen fertiliser at Green Park, Rand


Research organisatons
Funding source
Riverine Plains John Sykes Rural Consulting

Trial details

Researcher(s) John Sykes (John Sykes Rural Consulting)
Year(s) 2011
Contributor Riverine Plains
Trial location(s) Rand, NSW
Precision agriculture demonstrations on variable rate applications of nitrogen fertiliser at Green Park, Rand locations

To assess the effect of using variable nitrogen rates on crop yields. To determine if nitrogen-rich strips can be used to better determine the need for in-crop nitrogen.

Key messages

Precision agriculture can be used to apply variable rates of nitrogen fertiliser; generating fertiliser savings and optimising yields throughout the paddock. Optimising applied nitrogen fertilser results in optimum yields and gross margin.

Lead research organisation John Sykes Rural Consulting
Host research organisation Riverine Plains
Trial funding source GRDC SPA00010
Related program N/A

Angus MacNeil

Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Rate
Trial type Demonstration
Trial design Unreplicated

Rand 2011

Sow date 18 May 2011
Harvest date Not specified
Plot size 640m x 24.6m
Plot replication Not specified

Fertiliser as per treatments


Glyphosate and boxer gold

Soil amelioration

pH (H20) 6.2, pH (CaCl2) 5.5

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Variety
Treatment 1
Grain yield (t/ha)
1 Lincoln wheat 0N mid August 2.9
2 Lincoln wheat 20 N mid August 2.8
3 Lincoln wheat 40 N mid August 3.1
4 Lincoln wheat 80 N mid August 3
5 Lincoln wheat 80N mid June, 0N mid August 2.9
6 Lincoln wheat 80N mid June, 20N mid August 2.6
7 Lincoln wheat 80N mid June, 40N mid August 3.2
8 Lincoln wheat 80N mid June, 80N mid August 2.9

Grain yield t/ha

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Rand, NSW Red chromosol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Rand, NSW 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 Rand NSW
2011 577.7mm
2010 593.0mm
2009 532.8mm
2008 527.6mm
2007 504.1mm
2006 537.7mm
2005 554.5mm
2004 469.5mm
2003 434.0mm
2002 416.2mm
2001 463.4mm
2000 475.6mm
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



Rand NSW 2011

Observed climate information

Rainfall trial gsr (mm) 226mm

Derived climate information

Rand NSW


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: 22-05-2019 11:08am AEST