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Effect of sowing date, nitrogen application rates and timing on grain yield and quality of six wheat varieties - Merriwagga 2015

2015

Research organisation
Funding sources
Ag Grow Agronomy and Research Pty Ltd
<abbr title='Grains Research and Development Corporation'>GRDC</abbr> <abbr title='Department of Primary Industries (New South Wales)'>DPI NSW</abbr>

Trial details

Researcher(s) Barry Haskins
Eric Koetz
Rachael Whitworth
Year(s) 2015
Contributor Ag Grow Agronomy and Research Pty Ltd
Trial location(s) Merriwagga, NSW
Effect of sowing date, nitrogen application rates and timing on grain yield and quality of six wheat varieties - Merriwagga 2015 locations
Aims

Varieties can differ in their ability to yield at various sowing dates. The same goes for their response to various rates of nitrogen and how they turn that nitrogen into yield and protein. This trial was designed to measure the influence of sowing date and nitrogen rate across six common wheat varieties.

Key messages

Key findings:

  • Sowing time had a huge effect on yield.
  • Delaying sowing time reduced grain yield in all varieties across all nitrogen treatments. 
  • Given profitability and return on investment 40 kg N/ha at sowing was the ideal rate of nitrogen.
Lead research organisation Ag Grow Agronomy and Research Pty Ltd
Host research organisation N/A
Trial funding source GRDC DAN00129
Trial funding source DPI NSW DAN00129
Related program N/A
Acknowledgments

This trial was conducted by Ag Grow Agronomy and Research and VSAP. The VSAP project is funded by NSW DPI and GRDC under the Variety Specific Agronomy Package Project (DAN00129). The contributions of Jeffrey Muirhead “Palomar” in conducting this trial is gratefully acknowledged.
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Crop : Variety
  • Fertiliser : Rate
  • Fertiliser : Timing
  • Sowing : Timing
Trial type Experimental
Trial design Unknown

Merriwagga 2015

Sowing machinery

Tractor pulled Morris contour drill parallelogram cone seeder
Sow date TOS 1 29-04-2015, TOS 2 26-05-2015
Harvest date 11 November 2015
Plot size Not specified
Plot replication Not specified
Fertiliser

Start Fertiliser: 60kg MAP

  • 2 Nitrogen timings
    • N1: At sowing
    • N2: late tillering to first node stage

 

  • 5 nitrogen rates
    • N1 Rates: 0, 20, 40, 80, 160 kg/ha
    • N2 Rate: 40 kg/ha
Herbicide

Pre-emergent - 2.5 L Boxer Gold + 1.6L Avadex + 2L R'up Ultra Max

Post-emergent - 300ml Axial + 800ml MCPA 750 + 100g Lontrel + 1% Adigor
Fungicide

150ml Prosaro (end July)

400ml Amistar Xtra (early September)
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
Merriwagga, NSW Sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Merriwagga, NSW Kandosol
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 Merriwagga NSW
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Climate

Merriwagga NSW 2015

Observed climate information

Rainfall trial gsr (mm) 230mm

Derived climate information

Merriwagga NSW

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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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 report and links

2015 trial report



Trial last modified: 15-01-2026 16:00pm AEST