What effect does time of sowing and nitrogen have on wheat yield?

CC BY 4.0

Research organisaton
Funding sources

Trial details

Researcher(s) Mariano Cossani and Victor Sadras (SARDI)
Year(s) 2017
Contributor Hart Field Site Group
Trial location(s) , SA
Site 5, Hart, SA
What effect does time of sowing and nitrogen have on wheat yield? locations

To investigate the use of different sowing timings and N management to improve yield and maintain protein of wheat.

Key messages
  • Sowing date combined with appropriate variety selection and adequate nitrogen supply was key to increasing grain yields.
  • Nitrogen fertiliser decision needs to consider the maximum attainable yield and be adjusted for the seasonal conditions and initial available soil nitrogen.
Lead research organisation Hart Field Site Group
Host research organisation N/A
Trial funding source GRDC DAS00166
Trial funding source SARDI
Related program N/A

Funding for the establishment, maintenance, and analysis of field trials has been provided by the GRDC-SARDI bilateral (DAS00166). Special thanks are given to the Hart Field-Site Group, J. Fernandez-Lopez, G. Sepulveda and B. Sleep for their support and collaboration with the field and lab activities. We also acknowledge the help of Longreach and Australian Grain Technologies for their provision of the germplasm.

Other trial partners SARDI
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Sowing
  • Sowing: Timing
  • Variety
  • Variety: Type
Trial type Experimental
Trial design Unknown


Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Other trial notes

While all due care has been taken in compiling the information within this manual the Hart Field-Site Group Inc or researchers involved take no liability resulting from the interpretation or use of these results. We do not endorse or recommend th

Hart 2017

Sow date Not specified
Harvest date Not specified
Plot size 1.75m x 6m
Plot replication Not specified

Urea; @ 0 kg/N ha; @ 50 kg N/ha; @ 100 kg N/ha; @ 150 kg N/ha

Application time: 50% at 2-4 leaf & 50% at GS31

Other trial notes Not specified
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
, SA Not specified
Site 5, Hart, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
, SA Chromosol
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 SA Site 5, Hart SA
2017 263.5mm650.0mm
2016 234.0mm659.9mm
2015 183.0mm597.6mm
2014 215.8mm638.6mm
2013 182.0mm622.8mm
2012 204.1mm654.6mm
2011 254.5mm683.8mm
2010 224.3mm686.7mm
2009 177.7mm669.9mm
2008 149.6mm633.9mm
2007 184.7mm649.9mm
2006 211.3mm651.2mm
2005 267.9mm675.4mm
2004 226.1mm633.0mm
2003 193.2mm652.2mm
2002 181.4mm649.4mm
2001 220.5mm674.5mm
2000 201.8mm625.6mm
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



Site 5, Hart SA


Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
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: 06-08-2019 07:54am AEST