Increasing grain protein in wheat with late applied nitrogen


Research organisaton
Funding source

Trial details

Researcher(s) Claire Browne (BCG)
Ben Cordes (BCG)
Brad Jackson (Tyler’s Hardware )
Year(s) 2011
Contributor Birchip Cropping Group
Trial location(s) Site 2, Rupanyup, VIC
Increasing grain protein in wheat with late applied nitrogen locations

To assess grain protein following late applied foliar nitrogen at booting stage in wheat.

Key messages
  • To justify the use of late-applied nitrogen(N), a premium for H2 wheat (almost $60/t over ASW) was required in 2011.
  • UAN still increased protein despite rainfall 15 days after application.
  • 2011 highlighted the need to apply N during tillering to promote biomass and encouraging greater yield potential.
Lead research organisation N/A
Host research organisation N/A
Trial funding source BCG members
Related program N/A

This project was funded by BCG members, through their membership fees.

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


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

Rupanyup 2011

Sowing machinery

20cm row spacing, knife points and finger harrows

Sow date 28 May 2011
Harvest date Not specified
Plot size Not specified
Plot replication 4

­­­­70kg/ha MAP

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Grain yield (t/ha) Change in protein (%) Partial gross margin ($/ha) Protein (%) Cost ($/ha) Income ($/ha)
1 Nil 4.4 0 721 8.7 0 721
2 17kgN/ha 4.3 0.7 660 9.4 34 694
3 38kgN/ha 4.4 1.2 629 9.9 77 706
4 56kgN/ha 4.4 1.9 680 10.6 111 792
5 128kgN/ha 4.5 3 650 11.7 257 907

Grain yield t/ha


Change in protein %


Cost $/ha


Income $/ha


Partial gross margin $/ha


Protein %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 2, Rupanyup, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 2, Rupanyup, VIC Vertosol
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 Site 2, Rupanyup VIC
2011 431.2mm
2010 344.5mm
2009 292.7mm
2008 275.5mm
2007 274.8mm
2006 283.6mm
2005 316.0mm
2004 281.0mm
2003 275.8mm
2002 240.1mm
2001 285.1mm
2000 290.6mm
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



Site 2, Rupanyup VIC 2011

Observed climate information

Rainfall trial gsr (mm) 212mm

Derived climate information

Site 2, Rupanyup 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.