Managing Compass barley with nitrogen and PGRs


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) Protein (%) Screenings (%) Grain yield (t/ha) Test weight (kg/hL)
1 0 kg N/ha 9.8 0.5 2.49 62.4 9.1 0.7 3.02 63.2
1 40 kg N/ha 9.6 0.4 3.1 63.1 9.2 0.6 3.83 63
2 80 kg N/ha 9.5 0.3 3.85 63.5 9.5 0.4 4.66 63.5

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
Trial site Soil order
Site 5, Hart, SA Chromosol
National soil grid Source
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