Seeding rate by row spacing for barley grass management

2015
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Amanda Cook (SARDI)
Ian Richter (SARDI)
Wade Shepperd (SARDI)
Nigel Wilhelm (SARDI)
Year(s) 2015
Contributor Central West Farming Systems
Trial location(s) Minnipa, SA
Seeding rate by row spacing for barley grass management locations
Aims

To investigate the potential of non-chemical options for managing barley grass in a crop is increasing crop competition by reducing row spacing and increasing sowing rate.

Key messages
  • 18 cm (7”) systems showed better plant establishment in a drier seeding than the 30 cm (12”) system.
  • Higher seeding rates resulted in higher grain yield but also higher screenings and lower protein.
  • Grass weeds were lower in the higher seeding rate and in the 18 cm row spacing indicating crop competition is a non-chemical weed reduction method.
  • Single row or spread row seeding boots showed little differences in plant establishment, grain yield and quality or grass weed competition.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Trial funding source GRDC CWF00020
Related program N/A
Acknowledgments
  • Thank you to Sue Budarick for doing the weed counts and managing the weed germination trays. Funded by the
  • GRDC Overdependence on Agrochemicals project (CWF00020).
  • Registered products: see chemical trademark list.
  • Agrochemicals project (CWF00020), which is led by CWFS.

Other trial partners EPARF and SARDI
Download the trial report to view additional trial information

Method

Crop type Wheat
Trial type Experimental
Trial design Replicated

Minnipa 2015

Sow date 21 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Treatment 2
Establishment plants (plants/m2) Screenings (%) Test weight (kg/hL) Protein (%) Grain yield (t/ha)
1 60 plants/m2 target 18 cm row spacing 64 10.7 80 11.6 2.88
2 60 plants/m2 target 18 ribbon 57 10 79.5 11.8 2.79
3 60 plants/m2 target 30 cm row spacing 31 11.5 79.5 12.1 2.03
4 60 plants/m2 target 30 cm ribbon 27 11.7 79 12.3 2.03
5 120 plants/m2 target 18 cm row spacing 109 7.6 80 11.5 3.34
6 120 plants/m2 target 18 ribbon 114 8.5 79.7 11.4 3.36
7 120 plants/m2 target 30 cm row spacing 59 10.5 78.9 12.2 2.29
8 120 plants/m2 target 30 cm ribbon 67 10.9 79.2 12.2 2.4
9 240 plants/m2 target 18 cm row spacing 194 8.4 79.5 11.4 3.56
10 240 plants/m2 target 18 ribbon 186 7.1 80.2 11.3 3.54
11 240 plants/m2 target 30 cm row spacing 106 8.2 79.7 11.6 2.78
12 240 plants/m2 target 30 cm ribbon 103 9.9 79.6 12.2 2.64

Grain yield t/ha


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Establishment plants plants/m2


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Protein %


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Screenings %


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Test weight kg/hL


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Minnipa, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa, SA Calcarosol
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 Minnipa SA
2015 289.3mm
2014 336.5mm
2013 290.8mm
2012 330.8mm
2011 383.4mm
2010 385.3mm
2009 391.3mm
2008 330.4mm
2007 331.2mm
2006 334.5mm
2005 288.0mm
2004 296.1mm
2003 293.2mm
2002 283.3mm
2001 343.9mm
2000 389.0mm
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

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Minnipa SA

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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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: 25-04-2018 15:03pm AEST