Phosphorus fertiliser trial

CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA)
Year(s) 2010
Contributor Society of Precision Agriculture Australia
Trial location(s) Rand, NSW
Phosphorus fertiliser trial locations
  • To investigate the potential role of reducing inputs to improve gross margins.
  • To examine the effect of in crop monitoring using appropriate PA technology to enhance yield.
  • To demonstrate to local farmers the potential use of PA tools for crop management.
Key messages

The Rand site was sown on the 12th May 2010 with 8 treatments of various amounts of seed and P fertilizer. The variety was Lincoln and the sowing fertilizer was MAP. The site had grown canola in 2009 and had been summer sprayed for weeds. It was direct drilled into the canola stubble. The site had an N rich strip of 50hg/.ha of N applied about 5 weeks prior to the assessment in July 2010.

Lead research organisation Society of Precision Agriculture Australia
Host research organisation N/A
Trial funding source GRDC SPA000010
Related program N/A

Riverine Plains farmer, Roy Hamilton, provided both the site and equipment to sow and manage trial. Thank you to the Hamilton family for their generous support. John Sykes managed the trial and co-ordinated the discussion group. Riverine Plains provided trial extension, promotion and co-ordination. Peter Baines Agronomy - Crop Circle. SPAA - Leighton Wilksch facilitated the discussion group

Other trial partners Riverine Plains
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Fertiliser: Rate
  • Fungicide: Rate
  • Sowing: Rate
Trial type Precision agriculture
Trial design Not applicable

Rand 2010

Sow rate or Target density 35, 50 and 70 kg/ha
Sow date 12 May 2010 12 May 2010
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Treatment 2
Treatment 3
Treatment 4
Plant density (plants/m2) Screenings (%) Test weight (kg/hL) Gross margin ($/ha) Protein (%) Grain yield (t/ha)
1 Seeding @ 35 kg/ha MAP @ 11 kg/ha at sowing N fertiliser @ 20 kg/ha at Z15 N fertiliser @ 30 kg/ha at Z31 56 0.9 76 486 11 4.1
2 Seeding @ 35 kg/ha MAP @ 11 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 56 4.1
3 Seeding @ 70 kg/ha MAP @ 11 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 137 1.1 76 476 10.7 4.1
4 Seeding @ 50 kg/ha MAP @ 11 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 105 0.7 76 468 11 4
5 Seeding @ 50 kg/ha MAP @ 0 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 0.9 76 546 10.9 4.3
6 Seeding @ 50 kg/ha MAP @ 5 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 1 76 534 11 4.3
7 Seeding @ 50 kg/ha MAP @ 11 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 0.7 76 445 10.9 3.9
8 Seeding @ 50 kg/ha MAP @ 15 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 1 76 404 10.7 3.9
9 Seeding @ 50 kg/ha MAP @ 20 kg/ha at sowing N fertiliser @ 50 kg/ha at Z15 0.6 76 457 11.5 3.9

Grain yield t/ha


Gross margin $/ha


Plant density plants/m2


Protein %


Screenings %


Test weight kg/hL

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Rand, NSW Sandy loam
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
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



Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Rand NSW

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: 30-09-2019 15:08pm AEST