Monitoring barley grass in broad acre paddocks

2018

Research organisaton
Funding source

Trial details

Researcher(s) Amanda Cook (SARDI)
Year(s) 2018
Contributor SARDI Minnipa Agricultural Centre
Trial location(s) Minnipa Agricultural Centre, SA
Yaninee, SA
Related trials
Monitoring barley grass in broad acre paddocks locations
Aims

Barley grass weed density was monitored in three paddocks on upper EP (Minnipa Agricultural Centre (MAC), Heddle’s at Minnipa and Wilkins’ at Yaninee using an UAV during the 2017 (EPFS Summary 2017, p 83) and 2018 growing seasons at three different timings, with paddock transects conducted to verify grass weed density in paddocks.

 

Key messages
  • UAV imagery with skilled specialist analysis and programs has the potential to identify and map weed issues in paddocks.
  • Grass weed patches are easier to identify in legume and pasture crops than cereal crops.
  • Variability in germination and crop growth makes it harder to identify grass weed areas.
  • Data capture and analysis for analytical purposes such as grass weed mapping in individual paddocks will be beyond the skills of most farm businesses unless farmers have a special interest in this area.
  • Group A resistant barley grass has once again been detected at the Minnipa Agricultural Centre. Barley grass resistance to Group A herbicides has been detected three times in three years, so be aware it is present current farming systems.
Lead research organisation SARDI Minnipa Agricultural Centre
Host research organisation N/A
Trial funding source SAGIT S117
Related program N/A
Acknowledgments

This research was funded by SAGIT S117. Sincere thanks to SAGIT and their extremely valuable input into regional South Australian research and researchers and keeping people in jobs. Thank you to Bruce Heddle and Wilkins families for having the research and monitoring on their property.


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

Method

Crop types Weed: Barley Grass Hay: Vetch
Treatment type(s)
  • Management systems: Integrated weed management
Trial type
Trial design

Minnipa Agricultural Centre 2018 Barley Grass

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

Minnipa Agricultural Centre 2018 Vetch

Sowing machinery

In-crop paddock monitoring for grass weed populations

Grass weeds were assessed in crop or pasture at eight paddock-marked GPS points, and in 2018 also marked in the paddock with a large corflute sign visible in the imagery, with six or more counts taken at each sample point and each timing during the season. This was used to verify the UAV data captured at three times during the cropping season. Extra sampling points in the paddock were targeted if more information was needed to verify the imagery. The paddock photos were captured on an iPad with ‘Avenza Maps’ linked to the location in the paddock.

 

In 2018, grass weed assessments were undertaken on:

  • Heddle’s (sown early with barley and wheat) 13 July, 21 August, 14 September.
  • MAC (vetch) 9 August, 14 September, 18 October.
Sow date Multiple - please see report
Harvest date Unknown
Plot size Not specified
Plot replication Not specified

Yaninee 2018 Vetch

Sowing machinery Not specified
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
Minnipa Agricultural Centre, SA Red loam
Yaninee, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa Agricultural Centre, SA Calcarosol
Yaninee, 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 Agricultural Centre SA Yaninee SA
2018 335.2mm242.9mm
2017 338.2mm258.0mm
2016 305.1mm252.6mm
2015 286.4mm229.0mm
2014 338.0mm282.0mm
2013 287.6mm214.6mm
2012 329.5mm239.6mm
2011 356.6mm265.9mm
2010 337.6mm268.0mm
2009 369.5mm267.2mm
2008 300.3mm206.9mm
2007 285.9mm223.6mm
2006 305.8mm245.6mm
2005 267.5mm216.2mm
2004 263.8mm199.1mm
2003 263.8mm212.1mm
2002 254.9mm219.0mm
2001 317.8mm265.8mm
2000 353.9mm276.5mm
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

Minnipa Agricultural Centre SA 2018


Observed climate information

Rainfall avg ann (mm) 325mm
Rainfall avg gsr (mm) 241mm
Rainfall trial total (mm) 181mm
Rainfall trial gsr (mm) 156mm

Derived climate information

Minnipa Agricultural Centre SA

Yaninee SA

Minnipa Agricultural Centre SA

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Yaninee 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 report and links

2018 trial report



Trial last modified: 03-01-2023 12:04pm AEST