Managing dryland wheat for maximum yield potential - Tamarang 2014

2014

Research organisaton
Funding sources

Trial details

Researcher(s) Rick Graham (NSW DPI)
Bruce Haigh (NSW DPI)
Guy McMullen (NSW DPI)
Steven Simpfendorfer (NSW DPI)
Year(s) 2014
Contributor Department of Primary Industries NSW
Trial location(s) Tamarang, NSW
Managing dryland wheat for maximum yield potential - Tamarang 2014 locations
Aims

To determine the maximum attainable grain yield for a given location and year, and to quantify the contributions.

Key messages
  • Results from this study, clearly demonstrated that sowing timing is important. For example, delayed sowing (30 June vs 9 May) reduced the grain yield potential for EGA GregoryA by 1.75 t/ha or ~24%.
  • Agronomic management factors that affected yield potential from the early sowing time (9 May) included response to nitrogen (N) input (~9% variation), with genotype and crown rot disease pressure both individually accounting for ~8% variations in grain yield.
  • When the time of sowing was delayed to 30 June, agronomic factors had a larger impact/variation on grain yield potential. With both genotype (variety selection) and crown rot disease pressure responsible for a 13% variation/decline in grain yield.
  • Delayed sowing also affected yield response to N with no increase in grain yield potential due to N input, whilst targeted plant population affected grain yield, with the low population treatment accounting for ~9%
     
Lead research organisation Department of Primary Industries NSW
Host research organisation N/A
Trial funding source GRDC DAN00181
Trial funding source DPI NSW
Related program Northern region high yielding cereal agronomy - NSW
Acknowledgments

This experiment was co-funded by NSW DPI and GRDC under project DAN00181: Northern Region high yielding cereal agronomy – NSW. Thanks to David Ronald for providing the trial site. Technical assistance provided by Stephen Morphett, Jim Perfrement, Peter Formann, Jim Keir, Jan Hosking, Rod Bambach, and Richard Morphett (all NSW DPI) is also gratefully acknowledged.


Other trial partners Co-operators: David Ronald
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Sowing: Timing
  • Seed treatment: Inoculant
Trial type Experimental
Trial design Replicated

Tamarang 2014

Sow rate or Target density 60, 120 or 180 plants/m2
Sow date 19 May 2014 TOS 1: 9 May 2014; TOS 2 30 June 2014
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser

Nitrogen:

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

Phosphorus:

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

Treatments

A series of 36 treatment combinations (2 TOS × 18 treatments) were investigated in a partially factorial experiment, with three replicates. Treatments were designed similar to an omission trial, with the high input treatment aimed at providing the perceived optimum combination of factors and a low input treatment comprising a base set of agronomic factors.

Download the trial report to view additional method/treatment information

Download results

Trial results Impact of agronomic factors on grain yield with delayed sowing

# Treatment 1
Treatment 2
Treatment 3
Grain yield (t/ha)
1 EGA Gregory @ 120 plants/m2 100 kg N/ha + 20 kg P/ha 0 CR 7.33
2 EGA Gregory @ 120 plants/m2 0 kg N/ha + 20 kg P/ha 0 CR 6.7
3 EGA Gregory @ 120 plants/m2 100 kg N/ha + 20 kg P/ha +++ CR 6.75
4 Sunvale @ 120 plants/m2 100 kg N/ha + 20 kg P/ha 0 CR 6.77

Grain yield t/ha


Loading

Trial results Table 2

# Treatment 1
Treatment 2
Grain yield (t/ha)
1 LRPB Spitfire @ 120 plants/m2 0 CR 4.95
2 LRPB Spitfire @ 60 plants/m2 0 CR 4.52
3 LRPB Spitfire @ 120 plants/m2 +++ CR 4.32

Grain yield t/ha


Loading
Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Tamarang, NSW 0 - 10cm Black vertisol 7.60 0.22 77.00 737.00 26.00 1.41
Tamarang, NSW 10 - 30cm Black vertisol 7.80 0.03 17.00 319.00 19.00 0.86
Tamarang, NSW 30 - 60cm Black vertisol 8.10 0.25 11.00 244.00 11.00 0.53
Tamarang, NSW 60 - 90cm Black vertisol 8.00 0.40 24.00 261.00 5.00 0.37
Tamarang, NSW 90 - 120cm Black vertisol 8.10 0.40 41.00 275.00 3.00 0.42
Soil conditions
Trial site Soil texture
Tamarang, NSW Black vertisol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Tamarang, 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 Tamarang NSW
2014 258.1mm
2013 298.5mm
2012 313.1mm
2011 324.7mm
2010 375.5mm
2009 328.9mm
2008 354.0mm
2007 323.5mm
2006 294.5mm
2005 364.5mm
2004 383.8mm
2003 349.4mm
2002 266.4mm
2001 327.0mm
2000 298.4mm
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

Loading

Climate

Tamarang NSW 2014


Observed climate information

Rainfall trial gsr (mm) 170mm

Derived climate information

Tamarang NSW

NOTE: Exact trial site locality unknown - Climate data may not be accurate
Loading
Loading
Loading

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: 23-09-2019 13:31pm AEST