Timing of nitrogen in low rainfall canola

2014

Research organisaton
Funding source

Trial details

Researcher(s) Mark Seymour
Sally Sprigg
Year(s) 2014
Contributor Department of Agriculture and Food WA
Trial location(s) Merredin, WA
Timing of nitrogen in low rainfall canola locations
Aims

To investigate the response to changing the nitrogen rate and changing the time of application.  Canola yield and oil will be measured and RR hybrids will be compared with open-pollinated TT types (OP TT).

Key messages
  • With grain yield of less than 400kg/ha, there was no grain yield response to applied N and no economic response to applied N.
  • At ‘low rainfall’ N rates of 30 kg/ha top-up N at 12 weeks gave a similar response to top-up N within 8 weeks.
Lead research organisation Department of Agriculture and Food WA
Host research organisation N/A
Trial funding source GRDC DAW00227
Related program N/A
Acknowledgments

This trial is one of a series conducted throughout WA as part of the GRDC/DAFWA co-funded project “Tactical Break Crop Agronomy in Western Australia”.  Thanks to the Merredin RSU for trial management.  Laurie Maiolo provided technical assistance to ensure all treatments and measurements occurred in a timely and accurate fashion.


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

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Replicated

Merredin 2014

Sow rate or Target density 30 plants/m²
Sow date 13 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication 3
Fertiliser

Basal Fertiliser:100 kg/ha of Doublephos at seeding, 400 kg/ha of gypsum (17% Ca, 14% S) top-dressed over whole site before sowing (kg/ha) and 120 kg/ha of Muriate of Potash top-dressed over whole site 27th June.

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
Merredin, WA Brown sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Merredin, WA Sodosol
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 Merredin WA
2014 408.2mm
2013 440.9mm
2012 436.2mm
2011 410.7mm
2010 388.4mm
2009 426.0mm
2008 409.6mm
2007 377.6mm
2006 426.3mm
2005 386.1mm
2004 418.5mm
2003 426.3mm
2002 366.4mm
2001 411.5mm
2000 425.5mm
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

Merredin WA 2014


Observed climate information

Rainfall avg gsr (mm) 193mm

Derived climate information

Merredin WA

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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 last modified: 28-05-2019 12:08pm AEST