Residual nitrogen and phosphorus

CC BY 4.0

Research organisatons

Trial details

Researcher(s) James Easton (CSBP)
Year(s) 2012
Contributor West Midlands Group
Trial location(s) Badgingarra, WA
Residual nitrogen and phosphorus locations

To determine the residual value of nitrogen (N) and phosphorus (P) applied in 2011.

Key messages
  • This trial yielded 3.4 t/ha without fertiliser but there were still good responses to nitrogen (N) and phosphorus (P). The application of both nutrients increased yields up to 4.5 t/ha.
  • There was a 0.6 t/ha response to 80 kg N/ha and a 0.7 t/ha response to 24 kg P/ha.
  • 24 kg P/ha applied in both years produced 0.4 to 0.5 t/ha more than where 16 kg P/ha applied both years.
  • Residual responses to N and P applied in 2011 were not significant.
  • NS 41 applications increased protein from about 12.3% to 13.3%. Hectolitre weights were about 77 kg/hl and screenings averaged 1%.
  • The most profitable treatment over the two years of the trial was 24 kg/ha (136 kg/ha Double Phos) applied both years.
Lead research organisation CSBP
Host research organisation West Midlands Group
Related program N/A

John Scotney for the trial site.

Ryan Guthrie and Rowan Maddern (CSBP Field Research) for trial management.

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


Crop type Wheat
Treatment type(s)
  • Fertiliser
Trial type Experimental
Trial design Replicated

Badgingarra 2012

Sow rate or Target density 79kg/ha
Sowing machinery

Primary Sales Seeder.

Sow date Not specified
Harvest date Not specified
Plot size 20m x 2.5m
Plot replication 3
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
Badgingarra, WA Brown red sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Badgingarra, WA Chromosol
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 Badgingarra WA
2012 236.0mm
2011 224.8mm
2010 209.6mm
2009 228.5mm
2008 246.8mm
2007 198.9mm
2006 196.0mm
2005 242.6mm
2004 204.2mm
2003 230.9mm
2002 212.7mm
2001 192.5mm
2000 206.7mm
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.

Badgingarra WA

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: 09-07-2019 15:48pm AEST