The effect of combinations of crop row spacing, seedbed utilisation and pre-emergence herbicides on ryegrass management in barley

2019

Research organisatons
Funding source

Trial details

Researcher(s) Ben Fleet
Year(s) 2019
Contributor SARDI Minnipa Agricultural Centre
Trial location(s) Minnipa, SA
Related trials
The effect of combinations of crop row spacing, seedbed utilisation and pre-emergence herbicides on ryegrass management in barley locations
Aims

The effect of combinations of crop row spacing, seedbed utilisation and preemergence herbicides on ryegrass management in barley

Key messages
  • The herbicide treatment had a significant effect on annual ryegrass (ARG) plant density. Trifluralin only reduced ARG spike density by 20% compared to the untreated control, whereas Boxer Gold caused a 73% reduction in ARG spike density.
  • Barley sown on 25 cm row spacing resulted in a 38% less ARG seed production compared to the 37.5 cm row spacing treatment.
  • Barley sown using the splitter seed boot treatment had 32% lower ARG seed production than the narrow seed boot treatment.
  • It was still profitable to control ARG with effective herbicide treatments. Based on cash grain price of feed barley of $250/t in 2019, Trifluralin would be expected to increase the gross margin by $32/ha as compared $71/ha increase for Boxer Gold.

 

Minnipa SA 2019 Barley

Trial design split plot design with 4 replicates

Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation School of Agriculture, Food and Wine - The University of Adelaide
Trial funding source GRDC 9175134
Related program N/A
Acknowledgments

The authors thank Bruce and Kathryn Heddle for hosting the site. Malinee Thongmee and Hue Thi Dang (University of Adelaide), Fiona Tomney, Steve Jeffs, Bradley Hutchings and Katrina Brands (SARDI) for their technical input to the trial. We also acknowledge the investment from GRDC for the research into ‘Cultural management for weed control and maintenance of crop yield’ (9175134).


Other trial partners SARDI Minnipa Agricultural Centre
Download the trial report to view additional trial information

Method

Crop types Weed: Ryegrass Cereal (Grain): Barley
Treatment type(s)
  • Herbicide: Timing
  • Herbicide: Type
  • Sowing: Row Spacing
Trial type
Trial design

Minnipa 2019 Ryegrass

Sow rate or Target density Not specified
Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified

Minnipa 2019 Barley

Sow rate or Target density 180 seeds/m2
Sow date 20 May 2019
Harvest date Unknown
Plot size 1.5m x 10m
Plot replication 4
Fertiliser

At sowing – DAP (18:20:0:0) @ 60 kg/ha

Download the trial report to view additional method/treatment information

Download results

Trial source data unavailable: Trial may be in progress or trial results have not been recorded.

Trial results Key management operations undertaken at Minnipa trial site in 2019.

# Treatment 1
Treatment 2
1 Operation Details
2 Location Minnipa, SA
3 Seedbank soil cores 11 April
4 Plot size 1.5 m x 10 m
5 Seeding date 20 May
6 Fertiliser At sowing – DAP (18:20:0:0) @ 60 kg/ha
7 Variety Compass barley
8 Seeding rate 180 seeds/m2
9 Herbicides 20 May (applied just before seeding) Trifluralin 1.5 L/ha IBS Boxer Gold 2.5 L/ha IBS Control (knockdown treatment only)
10 Trial design split plot design with 4 replicates
11 Measurements: pre-sowing weed seedbank, crop density, weed density, ARG spike density, ARG seed production, wheat grain yield
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
2019 274.8mm
2018 293.5mm
2017 323.8mm
2016 315.3mm
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

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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 15:02pm AEST