Harvest weed seed collection in broad acre paddocks

2016 - 2018

Research organisatons
Funding source

Trial details

Researcher(s) Amanda Cook
Year(s) 2016 - 2018
Contributor SARDI Minnipa Agricultural Centre
Trial location(s) Minnipa Agricultural Centre, SA
Mudamuckla, SA
Harvest weed seed collection in broad acre paddocks locations
Aims

To report on a summary of paddock surveys of harvest weed seed collection samples taken in 2016, 2017 and 2018 as a part of the GRDC Stubble Initiative project ‘Maintaining profitability in retained stubbles on upper Eyre Peninsula’ (EPF00001).

 

Key messages
  • Harvest weed seed collection showed barley grass is harder to capture using harvest weed seed collection techniques due to its habit of shedding seed early.
  • Burning windrows decreased the number of weed seeds present in the soil seedbank at Minnipa in 2017.
  • Harvest weed seed collection allows for the capture of ryegrass weed seed and cereal screenings, potentially increasing feed utilisation for stock when placed in chaff dumps or rows.
Lead research organisation Eyre Peninsula Agricultural Research Foundation
Host research organisation SARDI Minnipa Agricultural Centre
Trial funding source GRDC EPF00001
Related program Maintaining profitable farming systems with retained stubble
Acknowledgments

This research was funded by GRDC as a small component of the Stubble Initiative. Thank you to Steve Jeffs, Katrina Brands, Fiona Tomney, Rochelle Wheaton and Brett Hay for helping with the data collection from the weed seed trays. Thanks to the farmers involved for having the research and monitoring on their properties.


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

Method

Crop type None: No crop specified
Treatment type(s)
  • Harvest: Method
  • Management systems: Integrated weed management
Trial type
Trial design

Minnipa Agricultural Centre 2016

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

Minnipa Agricultural Centre 2017

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

Minnipa Agricultural Centre 2018

Sowing machinery

Samples were collected post-harvest each season, with both soil and chaff samples taken to be assessed in weed seed trays during the following growing season. In-crop paddock monitoring for grass weed populations was undertaken and grass weeds were assessed at 10 GPS points along transects for weed density with six counts taken at each sample point.

 

Assessing weed seed capture and burning in narrow windrows

Soil samples for weed seed banks were collected in February 2017 along a transect across the paddocks comprising of 10 GPS-located sampling points. The core soil sampling method was described by Kleemann et al. (2014). Prior to narrow windrows being burnt, a 5 m section of chaff was removed (non-burnt area) within each paddock (see EPFS Summary 2015, p150-151 for further details) and weed seeds in soil or chaff were germinated in 2017. Germinating trays, 35

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

Mudamuckla 2016

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

Mudamuckla 2017

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

Mudamuckla 2018

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 Not specified
Mudamuckla, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa Agricultural Centre, SA Calcarosol
Mudamuckla, SA Tenosol
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 Mudamuckla SA
2018 335.2mm97.2mm
2017 338.2mm92.2mm
2016 305.1mm82.5mm
2015 286.4mm55.0mm
2014 338.0mm97.5mm
2013 287.6mm88.9mm
2012 329.5mm80.0mm
2011 356.6mm106.9mm
2010 337.6mm93.0mm
2009 369.5mm103.1mm
2008 300.3mm81.5mm
2007 285.9mm70.1mm
2006 305.8mm87.0mm
2005 267.5mm92.8mm
2004 263.8mm92.5mm
2003 263.8mm82.5mm
2002 254.9mm69.8mm
2001 317.8mm82.3mm
2000 353.9mm98.3mm
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 Agricultural Centre SA

Mudamuckla SA

Minnipa Agricultural Centre SA

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Mudamuckla SA

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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 10:37am AEST