Agronomic drivers of yield in rain fed wheat production systems in Central West NSW - Trangie

2014 - 2015

Research organisaton
Funding sources

Trial details

Researcher(s) Greg Brooke (NSW DPI)
Neroli Graham
Rick Graham (NSW DPI)
Guy McMullen (NSW DPI)
Steven Simpfendorfer (NSW DPI)
Year(s) 2014 - 2015
Contributor Department of Primary Industries NSW
Trial location(s) Trangie Agricultural Research Centre, NSW
Further information View external link
Related trials
Agronomic drivers of yield in rain fed wheat production systems in Central West NSW - Trangie locations
Aims

To benchmark yield potential across a range of growing environments in the NGR of NSW, over two consecutive seasons, and to quantify the impact of genotype, management and environment on yield.

Key messages
  • Sowing time for the wheat varieties was found to be the key determinant of yield potential. Delays in sowing date (SD) resulted in yield losses of 34% or 1.20 t/ha for EGA GregoryA averaged across years.
  • Variety selection was also found to be a significant factor influencing yield potential, with the longer season variety SunvaleA being 16% or 0.6 t/ha lower yielding than LRPB CrusaderA from an early SD. The shorter season variety LRPB CrusaderA performed well across SD options in this environment.
  • Increasing targeted plant populations was shown to increase yield potential by ~8% (0.2 t/ha) when SD was delayed, supporting the accepted principle of increasing the target plant population for delayed sowings.
  • However, altering variety and/or maturity type, and increasing target plant populations in response to delayed SDs could not fully compensate for yield losses associated with delayed sowings.
  • Yield responses to nitrogen (N) and phosphorus (P) fertiliser application rates were variable and influenced by starting soil levels and seasonal conditions. Significant yield responses of around 19% were achieved in response to P application, highlighting the importance of knowing starting soil nutrition values when trying to optimise yield potential.
Trangie Agricultural Research Centre NSW 2014

A series of 36 treatment combinations (two times of sowing × 18 treatments) were examined in a partially factorial split-plot design, with three replicates at each site

Lead research organisation Department of Primary Industries NSW
Host research organisation N/A
Trial funding source GRDC DAN00181
Trial funding source DPI NSW DAN 00181
Related program Northern region high yielding cereal agronomy - NSW
Acknowledgments

This research was part of the project Northern region high yielding cereal agronomy – NSW (DAN 00181), with joint investment by NSW DPI and GRDC. Technical assistance provided by Paddy Steele, Lizzie Smith, Sally Wright and Ray Platt (all NSW DPI) for the sowing, maintaining and harvesting of experiments is greatly appreciated.


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: Type
  • Pest Management: Fungal
  • Sowing: Rate
  • Sowing: Timing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Trangie Agricultural Research Centre 2014

Sow rate or Target density 3 targeted plant populations: 60, 120 or 180 plants/m2
Sow rate or Target density 3 targeted plant populations: 60, 120 or 180 plants/m2
Sow date 15 May 2014 SD1: 15 May 2014; SD2: 11 June 2014
Harvest date Not specified
Plot size Not specified
Plot replication 3
Psuedoreplication Not specified
Plot blocking Partially factorial split-plot design
Fertiliser

Nitrogen (N) rates:

  • 0, 50, 100, 150 or a 50 + 50 kg N/ha split application all applied as urea (46% N). Treatments were side banded at sowing, apart from the split application, which was applied at sowing and broadcast at stem elongation (GS31).

Phosphorous (P) rates:

  • 0, 10, 20 or 30 kg P/ha applied as triple super at sowing.
Inoculant 0, 0.5, 1.0 or 2.0 g/m row sterilised durum grain colonised by at least five different isolates of Fp± added at sowing i.e.; 0, CR+, CR++ or CR+++
Other trial notes

This research paper is an extract from the publication Northern grains Research Results 2017, available at
https://www.dpi.nsw.gov.au/agriculture/broadacre-crops/guides/publications/ngrt-results
 

Trangie Agricultural Research Centre 2015

Sow rate or Target density 3 targeted plant populations: 60, 120 or 180 plants/m2
Sow rate or Target density 3 targeted plant populations: 60, 120 or 180 plants/m2
Sow date SD1: 7 May 2015; SD2: 25/05/2015
Harvest date Unknown
Plot size Not specified
Plot replication 3
Psuedoreplication Not specified
Plot blocking Partially factorial split-plot design
Fertiliser

Nitrogen (N) rates:

0, 50, 100, 150 or a 50 + 50 kg N/ha split application all applied as urea (46% N). Treatments were side banded at sowing, apart from the split application, which was applied at sowing and broadcast at stem elongation (GS31).

Phosphorous (P) rates:

0, 10, 20 or 30 kg P/ha applied as triple super at sowing.

Inoculant Not specified
Other trial notes

This research paper is an extract from the publication Northern grains Research Results 2017, available at
https://www.dpi.nsw.gov.au/agriculture/broadacre-crops/guides/publications/ngrt-results
 

Download the trial report to view additional method/treatment information

Download results

Trial results Mean site yield (t/ha) and corresponding yield range (t/ha) averaged across varieties

@T1: Sowing date 1 (15-05-2014) @T2: Sowing date 2 (11-06-2014)
# Mean site yield (t/ha) Yield range (.) Mean site yield (t/ha) Yield range (.)
1 3.07 3.07 - 2.74 1.82 1.92 - 1.72
1

Mean site yield t/ha


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Trial results Effect of management and crown rot (Fp) on grain yield potential - Trangie across site analysis

# Variety
Treatment 1
Grain yield (t/ha) Target plant population (plants/m2) Fusarium pseudograminearum (CR+++) (.) Applied nitrogen (kg N/ha) Applied phosphorous (kg P/ha) Yield gap (t/ha)
1 LRPB Crusader Sowing date 1: early/main season 3.78 80 0 100 20
2 Sunvale Sowing date 1: early/main season 3.17 80 0 100 20 -0.61*
3 EGA Gregory Sowing date 1: early/main season 3.531 80 0 100 20 ns
4 EGA Gregory Sowing date 2: delayed 2.331 80 0 100 20 -1.20*
5 LRPB Spitfire Sowing date 2: delayed 2.58 160 0 100 20
6 LRPB Spitfire Sowing date 2: delayed 2.38 80 0 100 20 -0.20*
7 LRPB Spitfire Sowing date 2: delayed 2.14 40 0 100 20 -0.44*

Grain yield t/ha


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Applied nitrogen kg N/ha


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Applied phosphorous kg P/ha


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Target plant population plants/m2


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Yield gap t/ha


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Trangie Agricultural Research Centre, NSW Vertisol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Trangie Agricultural Research Centre, NSW 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 Trangie Agricultural Research Centre NSW
2015 66.2mm
2014 36.6mm
2013 59.4mm
2012 44.0mm
2011 63.9mm
2010 209.0mm
2009 211.4mm
2008 157.7mm
2007 162.2mm
2006 151.7mm
2005 236.6mm
2004 210.3mm
2003 224.7mm
2002 198.5mm
2001 265.5mm
2000 369.8mm
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

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Climate

Trangie Agricultural Research Centre NSW 2014


Observed climate information

Rainfall avg ann (mm) 496.2mm
Rainfall trial gsr (mm) 144mm

Derived climate information

Trangie Agricultural Research Centre NSW

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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

2014 trial report



Trial last modified: 14-03-2024 15:43pm AEST