Capturing barley grass seeds in broad acre paddocks

2019

Research organisaton
Funding source

Trial details

Researcher(s) Amanda Cook
Contact email Amanda.cook@sa.gov.au
Contact phone 0427270154
Year(s) 2019
Contributor SARDI Minnipa Agricultural Centre
Trial location(s) Condada, SA
Capturing barley grass seeds in broad acre paddocks locations
Aims

Barley grass continues to be a major grass weed in cereal cropping regions on the upper Eyre Peninsula (EP). Swathing a cereal crop involves cutting and collecting the cereal crop and weeds into windrows at 20 to 40% grain moisture and allowing it to dry. Having the weed seeds cut and in the windrow before the seed heads shatter and before tillers fall over (lodging), may allow greater weed seed collection when using a chaff cart or windrows. Swathing early then harvesting for weed seed collection needs further evaluation as it may provide farmers with another tool for integrated weed management, especially for barley grass that matures and sheds seed before crops ripen.

Key messages
  • In 2019, approximately 40% of barley grass seeds had already dropped on the ground before the first swathing opportunity.
  • Barley grass seed retention declines with every successive week and by crop maturity retained only 20% of its seed on the head.
  • If growers are aiming to collect grass seed using harvest weed seed management strategies (chaff carts or windrows) they need to harvest grassy paddocks as early as possible to maximise weed seed collection.

 

Condada SA 2019 Barley

Location: Condada: Matt Cook

Rainfall:L Av. Annual: 324 mm Av. GSR: 241 mm 2019 Total: 224 mm 2019 GSR: 209 mm

Paddock history 2019: Scepter wheat 2018: Emu Rock wheat 2017: Self-regenerating grass free medic pasture

Soil type Red Sandy loam

Plot size Paddock monitoring

Lead research organisation SARDI Minnipa Agricultural Centre
Host research organisation SARDI Minnipa Agricultural Centre
Trial funding source SAGIT SAGITS117
Related program N/A
Acknowledgments

Thank you to Matt Cook for the monitoring site, and Steve Jeffs and Katrina Brands for processing the barley grass samples. Research funded by SAGIT S117.


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

Method

Crop types Weed: Barley Grass Cereal (Grain): Barley
Treatment type(s)
  • Crop: Type
Trial type
Trial design

Condada 2019 Barley Grass

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

Condada 2019 Barley

Sow date May
Harvest date 1 October 2019 1st October 2019
Plot size Not specified
Plot replication Not specified
Psuedoreplication 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
Condada, SA Red sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Condada, 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 Condada SA
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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.

Condada 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

2019 trial report



Trial last modified: 19-05-2023 14:22pm AEST