Agronomy of early sown wheat: Density and nitrogen timing effects on productivity in Western Australia

2018

Research organisaton
Funding sources

Trial details

Researcher(s) Christine Zaicou-Kunesch, Jeremy Curry, Brenda Shackley and Georgia Trainor (DPIRD, WA)
Year(s) 2018
Contributor Department of Primary Industries and Regional Development WA
Trial location(s) Site 3, Gibson, WA
Katanning, WA
Muresk, WA
Yuna, WA
Further information View external link
Agronomy of early sown wheat: Density and nitrogen timing effects on productivity in Western Australia locations
Aims

To test the following hypotheses:
1. Low plant density will not reduce yield of early April sown wheat
2. Delayed nitrogen application will not affect grain yield
3. Agronomy can offset yield reductions from grazing wheat sown in early April

Key messages
  • Four field trials in 2018 assessed the influence of plant density, nitrogen timing and grazing on yield and quality of three long maturing wheat varieties sown early April in Western Australia.
  • Based on yield, Forrest and Longsword wheat varieties are more suitable for the early sowing opportunities in April than growing a mid winter (ie EGA Wedgetail) earlier.
  • If there are establishment issues sowing in early April, there is generally no penalty if establishment is down to 50 plants/m². Some varietal specific responses were observed although these responses were also driven by nitrogen timing.
  • For early April sown crops, delaying nitrogen application until stem elongation improved yields at Esperance, Katanning and Yuna.
  • Grazing did reduce yields by up to 0.9t/ha depending on environment and variety choice, but could be achieved with minimal yield loss for some varieties and environments.
Lead research organisation Department of Primary Industries and Regional Development WA
Host research organisation N/A
Trial funding source GRDC DAW00249
Trial funding source DPIRD WA
Related program Tactical wheat agronomy for the west
Acknowledgments

The research undertaken as part of this project is possible by the significant contributions of growers through both trial cooperation and GRDC investment. The author would like to thank them for their continued support. The research is co-funded with DPRID. Sincere thanks to the Brooks family and Muresk Institute for the provision of land and irrigation water at Yuna and Muresk respectively. Also to the Geraldton, Northam, Katanning and Esperance Field Support Units for the management of trials and to Melanie Kupsch, Bruce Haig, Rod Bowey and Helen Cooper for technical support.


Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Timing
  • Grazing
  • Sowing: Row spacing
  • Variety: Type
Trial type Experimental
Trial design Replicated

Gibson 2018

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Katanning 2018

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Muresk 2018

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Yuna 2018

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication 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
Site 3, Gibson, WA Not specified
Katanning, WA Not specified
Muresk, WA Not specified
Yuna, WA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 3, Gibson, WA Anthroposol
Katanning, WA Anthroposol
Muresk, WA Anthroposol
Yuna, WA Anthroposol
National soil grid Source
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

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 3, Gibson WA

Katanning WA

Muresk WA

Yuna WA

Site 3, Gibson WA

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

Katanning WA

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

Muresk WA

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

Yuna WA

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.




CC BY
Individual Trial Project data and information and OFT metadata are licensed under a Creative Commons Attribution 4.0 International License.
The data and information accessed through OFT may also be subject to Terms of Use specified by the Trial Contributor,
in which case the Terms of Use of a Trial Contributor take precedence over other information provided on OFT.
Trial last modified: 11-09-2019 09:48am AEST