Sunflower configuration × population × hybrid – Gurley 2015–16


Research organisaton
Funding sources

Trial details

Researcher(s) Loretta Serafin, Mark Hellyer and Peter Perfrement (NSW DPI)
Year(s) 2015
Contributor Department of Primary Industries NSW
Trial location(s) Site 3, Gurley, NSW
Further information View external link
Related trials
Sunflower configuration × population × hybrid – Gurley 2015–16 locations

Optimising sunflower performance relies on being able to match a hybrid with the growing environment and ensuring that the most suitable agronomic management is provided. Suitable crop agronomy involves using the most appropriate row configuration and plant population as well as ensuring adequate nutrition, disease and insect management. This experiment and others conducted in this series were designed to provide recommendations for growers and advisors to support decisions on optimal row configuration, plant population and hybrids for sunflower production in the north-western and Liverpool Plains regions of NSW. These two environments are the primary sunflower growing regions in northern NSW.

Key messages
  • Sunflower yields were very low at this site in 2015–16, averaging 0.56 t/ha.
  • Plant population affected plant measurements, with larger head diameters and 1000 grain weights resulting from lower populations.
  • Hybrid selection also affected plant measurements. Ausistripe 14 had the longest arc length but the smallest head diameter. Ausigold 4 and Ausigold 62 had very similar plant characteristics.
Lead research organisation Department of Primary Industries NSW
Host research organisation N/A
Trial funding source GRDC DAN00197
Trial funding source DPI NSW DAN00197
Related program Tactical agronomy for selected crops in the northern region (safflower, linseed, sunflower)

This experiment was part of the project Tactical agronomy for selected crops in the northern region (safflower, linseed, sunflower) (DAN00197), with joint investment by NSW DPI and GRDC. Technical assistance provided by Delphi Ramsden, Angus Hombsch, Alice Bowler and Bronwyn Brennan (NSW DPI) is gratefully acknowledged. Thanks to Doug Clark, ‘Kyntyre’, Gurley for hosting the experiment.

Other trial partners Doug Clark, ‘Kyntyre’, Gurley
Download the trial report to view additional trial information


Crop type Sunflower
Treatment type(s)
  • Crop: Type
  • Sowing
  • Sowing: Rate
  • Sowing: Row spacing
  • Variety
  • Variety: Type
Trial type Experimental
Trial design Replicated

Gurley 2015

Sow rate or Target density 15,000 plants/ha 25,000 plants/ha or 35,000 plants/ha
Sow date 9 September 2015
Harvest date 23 February 2016
Plot size Not specified
Plot replication Not specified

42 kg/ha Granulock Z applied at sowing

Download the trial report to view additional method/treatment information

Download results

Trial results Target versus actual plant populations established

# Target plant population (plants/ha) Plant establishment (plants/ha)
1 15000 20680
2 25000 28120
3 35000 44260

Plant establishment plants/ha


Target plant population plants/ha


Trial results Hybrid performance at 'Kyntyre'

# Variety
Test weight (kg/hL) 1000 grain weight (g)
1 Ausigold 4 35.8 41
2 Ausigold 62 38.3 38.1
3 Ausistripe 14 39.7 44.4

1000 grain weight g


Test weight kg/hL

Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Site 3, Gurley, NSW 0 - 10cm Vertisol 6.10 16.00 6.00 0.49
Site 3, Gurley, NSW 10 - 30cm 7.00 4.00 8.00 0.43
Site 3, Gurley, NSW 30 - 60cm 7.80 2.00 11.00 0.34
Site 3, Gurley, NSW 60 - 90cm 7.90 0.00 11.00 0.28
Site 3, Gurley, NSW 90 - 120cm 8.00 3.00 2.00 0.12
Soil conditions
Trial site Soil texture
Site 3, Gurley, NSW Vertisol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 3, Gurley, NSW 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 3, Gurley NSW
2015 166.4mm
2014 162.2mm
2013 168.4mm
2012 202.5mm
2011 213.1mm
2010 222.1mm
2009 206.0mm
2008 207.6mm
2007 217.3mm
2006 217.8mm
2005 244.9mm
2004 281.1mm
2003 285.1mm
2002 294.3mm
2001 382.3mm
2000 506.8mm
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 3, Gurley NSW 2015

Observed climate information

Rainfall avg ann (mm) 603mm
Rainfall avg gsr (mm) 383.4mm
Rainfall trial gsr (mm) 284.5mm

Derived climate information

Site 3, Gurley 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 report and links

2015 trial report

2015 trial report

Trial last modified: 04-06-2019 11:43am AEST