De-risking the seeding program 2024
Aim of the project
Adoption of key management practices for the success of dry early sown crops. On Eyre Peninsula, trials comparing fertiliser placement, use of long coleoptile varieties. will be sown at two locations on northern Eyre Peninsula. These will follow on from trials conducted under the SA Drought Hub early sowing project at Cowell and Penong.
Project Summary
Dry and early sowing of cereal crops is a practice commonly employed across southern Australian cropping regions to combat the increasingly erratic and delayed opening season rainfall. Whilst there has been a large amount of research and development undertaken on dry and early sowing, significant opportunities remain to engage growers in the adoption of strategic management approaches that best suit local grower needs, management preferences, and local climatic and environmental conditions. This project will see fifteen prominent Grower Groups partner with 4 Drought Hubs to deliver a program that accelerates the adoption of strategic dry and early sown crop management approaches. Each group will tailor activities to meet the knowledge, experience, and needs of their member bases and local communities. The project will provide a legacy through developed extension networks, resources, information, and learning groups and see practice adoption across two million hectares of arable land.
2024 Trial Summary – Upper Eyre Peninsula
The season began dry, with significant rainfall finally arriving on May 30 and again from June 18–26. This rainfall event consisted of continuous showers. Most upper EP locations received over 15 mm of rainfall by the 26th June. Two trials investigating pre-emergent herbicide damage under early/dry sowing were planned at Rudall and Elliston. The Elliston site was destroyed by Cape Barren Geese and resown at Port Kenny on May 22.
Trial Sites & Sowing Dates
- Rudall: Sown 18 April
- Port Kenny (replacing Elliston): Sown 22 May
Trial Focus
Testing herbicide effects at two sowing depths (3–4 cm vs. 8 cm) using Calibre wheat and a range of IBS herbicide treatments including Trifluralin, Sakura, Overwatch, Boxer Gold, Mateno Complete, Diuron, and Metribuzin.
Key Notes
- Deep seeding reduced crop establishment but did not cause any yield penalties at two sites compared toshallow sown crops.
- Yields were the same for all early season grass weed control herbicide treatments. This is likely due to water availability being more if a prominent factor influencing grain yield in the dry conditions of 2024
- Elliston trial data is void due to grazing damage.
- Conditions remained dry throughout the season (Decile 1 rainfall).
- Trial results were presented during the Mt Cooper Ag Bureau Sticky Beak Day (Oct 1).
Plant establishment of shallow sown crop (Left), deep sown crop (middle) and the comparison of Zadoks growth stage of crops from the same deep sown plot (Right) at Rudall, 2024.
Elijah Luo (SARDI MAC) presenting at the Port Kenny De-Risking the Seeding Program Trial Site on 1 October 2024.Â
Project Partners
Ag Excellence Alliance & SARDI
Further Resources
Check out this case study demonstrating two different approaches taken by EP farming businesses to overcome the impact of fertiliser toxicity on seed germination and emergence in dry sowing situations.
You can explore the practices trialled by other farming systems groups on the project lead AgExcellence Website
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