Researcher(s) |
Ian Menz Daryl Reardon Craig Ryan |
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Year(s) | 2017 |
Contributor | Department of Primary Industries NSW |
Trial location(s) |
Condobolin, NSW
|
Further information | View external link |
To determine the optimum sowing date, phenology and nitrogen management to optimise grain yield within the Central West region of NSW. These combinations were tested across two contrasting scenarios: irrigation versus dryland.
• Variety phenology and sowing date need to match to avoid plants flowering and podding during periods of severe frost. The highest yield in 2017 came from the 6 April sowing of the long season varieties Archer and ATR WahooA that flowered in early August.
• ATR Stingray and Nuseed® Diamond flowered earlier than the optimum start of flowering (OSF) date (28 July) from both the 6 April and 20 April sowing dates with significant frost damage incurred at both sowing dates.
• Canola varieties have the ability to recover from severe frost damage where soil water is not limited.
This experiment highlighted the importance of matching varietal phenology and sowing date to achieve the correct flowering date to avoid stress and optimise yield. Sowing a fast developing variety early results in that variety flowering/podding during a period of high frost risk. However, this experiment did show that with increased plant available water, canola can recover from severe frost. Stated in Ten Tips to Early-Sown Canola the simulated OSF date for Condobolin is 25 July (Lilley et al. 2017). In 2017, treatments that flowered before late July were severely frosted. It is recommended that growers ensure a weed-free fallow to maximise water available to canola to aid in frost recovery. Rotation planning can also make a large difference; choose a crop sequence (such as pulses) that leaves some deeper sub-soil moisture for the canola crop. This experiment has shown that if additional water is available and the crop suffers frost damage it has the ability to recover.
Lead research organisation |
Department of Primary Industries NSW |
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Host research organisation | N/A |
Trial funding source | GRDC CSP00187 |
Trial funding source | DPI NSW |
Related program |
Optimised Canola Profitability Project |
Acknowledgments |
This experiment was a joint investment by GRDC and NSW DPI as part of the collaborative project ‘Optimised canola profitability’, CSP00187, 2014–19, a partnership also including CSIRO and SARDI. Thanks to the operational staff at Condobolin ARAS for assistance throughout this experiment. |
Other trial partners | Not specified |
Crop type | Oilseed: Canola |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Replicated |
Sow date | Multiple - please see report |
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Harvest date | Harvested by hand as varieties reached maturity |
Plot size | Not specified |
Plot replication | Not specified |
Fertiliser |
70 kg/ha mono-ammonium phosphate (MAP) |
Fungicide |
Jubilee (flutriafol 500 g/L) at 400 mL/ha (fungicide on fertiliser) |
Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2018, available at |
Rainfall trial gsr (mm) | 99mm |
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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.