Amanda Cook Ben Fleet Gurjeet Gill Daniel Peterson
Year(s)
2019
Contributor
SARDI Minnipa Agricultural Centre
Trial location(s)
Adelaide, SA
Clare, SA
Cowell, SA
Kadina, SA
Kimba, SA
Maitland, SA
Minnipa, SA
Pinery, SA
Port Lincoln, SA
Aims
To provide information that substantiates the implications of chaff-lining to weed seedbanks.
Key messages
Investigation of weed seedbank decline in nine chaff-lining systems of South Australia demonstrated that growers are achieving high concentration of weed seeds and crop residue at harvest.
Assessment of the viable weed seed fraction after crop harvest suggests that large residual annual ryegrass, brome grass and Indian hedge mustard seedbanks have been established in cropping field because these species did not decay over the summer-autumn period in chaff-lines.
Evaluation of chaff-tramlining systems showed that annual ryegrass seedbank decline is independent of chaff-line configuration and chaff density.
The stability in the weed seedbanks in chaff-lines were consistent with the dry conditions over the summer-autumn period.
Growers should be cautious of the magnitude of viable weed seeds in chaff-lines before the cropping season and expect variability in the effectiveness of this tactic between seasons.
Lead research organisation
School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation
SARDI Minnipa Agricultural Centre
Trial funding source
GRDC UA00156
Related program
N/A
Acknowledgments
The research undertaken as part of this project is made possible by the significant contributions of the growers through both trial cooperation, Jerel Fromm, Ian Noble and Ed Hunt on EP, and the support of the GRDC in project UA00156. Thank you to Ian Richter, Katrina Brands, Bradley Hutchings and Steve Jeffs (SARDI) for their technical input to the EP samplings.
Trial source data and summary not available Check the trial
report PDF for trial results.
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.
Adelaide SA
Clare SA
Cowell SA
Kadina SA
Kimba SA
Maitland SA
Minnipa SA
Pinery SA
Port Lincoln SA
Adelaide SA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Clare SA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Cowell SA
Kadina SA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Kimba SA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Maitland SA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Minnipa SA
Pinery SA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Port Lincoln SA
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
GRDC Final Report
UA00156
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Related Final Reports By Author(s)
Amanda Cook, Ben Fleet, Gurjeet Gill, Daniel Peterson
