Managing Compass barley with nitrogen and PGRs

CC BY 4.0

Research organisaton

Trial details

Researcher(s) Rochelle Wheaton and Sarah Noack (Hart Field Site Group)
Year(s) 2016
Contributor Hart Field Site Group
Trial location(s) Site 5, Hart, SA
Managing Compass barley with nitrogen and PGRs locations

To investigate the effects of different rates of nitrogen +/- plant growth regulator (PGR) treatment on plant height, lodging, head loss and yield.

Key messages
  • The application of a plant growth regulator (PGR) significantly reduced plant height for all nitrogen rates (0-80 kg N/ha).
  • Grain yield increased with higher nitrogen rates, however PGR application had no effect.
  • The highest yielding treatment was a combination of 80 kg N/ha + PGR at 4.66 t/ha.
Lead research organisation Hart Field Site Group
Host research organisation Hart Field Site Group
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Barley
Treatment type(s)
  • Fertiliser
  • Growth regulator
  • Variety
  • Variety: Type
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Hart 2016

Sow date 10 May 2016
Harvest date Not specified
Plot size 1.75m x 10m
Plot replication 3
  • No fertiliser at seeding
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: no PGR @T2: plus PGR
# Treatment 1
Protein (%) Screenings (%) Grain yield (t/ha) Test weight (kg/hL) Test weight (kg/hL) Protein (%) Screenings (%) Grain yield (t/ha)
1 0 kg N/ha 9.8 0.5 2.49 62.4 63.2 9.1 0.7 3.02
1 40 kg N/ha 9.6 0.4 3.1 63.1 63 9.2 0.6 3.83
2 80 kg N/ha 9.5 0.3 3.85 63.5 63.5 9.5 0.4 4.66

Grain yield t/ha


Protein %


Screenings %


Test weight kg/hL

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 5, Hart, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 5, Hart, SA 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 Site 5, Hart SA
2016 659.9mm
2015 597.6mm
2014 638.6mm
2013 622.8mm
2012 654.6mm
2011 683.8mm
2010 686.7mm
2009 669.9mm
2008 633.9mm
2007 649.9mm
2006 651.2mm
2005 675.4mm
2004 633.0mm
2003 652.2mm
2002 649.4mm
2001 674.5mm
2000 625.6mm
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.

Site 5, Hart SA


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: 11-06-2019 13:49pm AEST