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repellent soil

Catalogue: GRDC Publications
Testing of clays is recommended... Dave warns that stock health must be monitored and treated on newly ploughed crops... Peter chose the highest rate of subsoil material of between 200 to 300t/ha of clay rich subsoil to apply to his damaged back paddocks...
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Catalogue: GRDC Updates
Soil mixing such as rotary spading often proves an excellent clay incorporation method and offers opportunities for simultaneous incorporation of soil improvers such as lime or gypsum... The paired row seeding boots gave the highest yield response over knife points with nearly a 1t yield increase on the pale deep sand and a 650 kg/ha yield increase on the sandy gravel... Using rounded or 'V'-shaped press-wheels can minimise the risk of furrow collapse and infill and also prevent the furrow side walls being ripped up, which can occur with more rectangular shaped press-wheels creating a tumbling mass of soil behind the press wheel and poor product placement...
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Catalogue: GRDC Updates (South)
Supported by Research Update sponsored by.. In summary there was no "concerning" level of seed loss observed at any trial or timing, correlating well with the yield data... In summary, yield loss as a result of delayed windrow timing assumedly through shattering has not been demonstrated except in one extreme case with very late timings with colour change in excess of 100%...
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Catalogue: GRDC Updates
Grower adoption and implementation of strategies to manage soil water repellence in farming systems.. No detailed time-series soil surveys have been conducted to confirm the perception that water repellence is increasing the expression of the constraint is easier to diagnose than most because of the obvious nature of the impacts on establishment, water infiltration and variable soil wetting... The grower intends to continue mouldboard ploughing and using the paired row seeder which is also a good implement for seeding ploughed areas...
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Catalogue: GRDC Updates (West)
" Grower adoption and implementation of strategies to manage soil water repellence in farming systems.. No detailed time-series soil surveys have been conducted to confirm the perception that water repellence is increasing the expression of the constraint is easier to diagnose than most because of the obvious nature of the impacts on establishment, water infiltration and variable soil wetting... The grower intends to continue mouldboard ploughing and using the paired row seeder which is also a good implement for seeding ploughed areas...
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Catalogue: GRDC Media
Seeding rates theory holds water for repellent soils.. Topsoil water repellence was measured at all sites using the Molarity of Ethanol Droplet (MED) test... "At Yealering, the use of soil wetters increased the plant numbers over the control by at least 18 per cent at the 60kg/ha seed rate and 22 per cent at the 120klg/ha seed rate," he said...
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Catalogue: GRDC Media
Seeding rates theory holds water for repellent soils.. Topsoil water repellence was measured at all sites using the Molarity of Ethanol Droplet (MED) test... "At Yealering, the use of soil wetters increased the plant numbers over the control by at least 18 per cent at the 60kg/ha seed rate and 22 per cent at the 120klg/ha seed rate," he said...
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Catalogue: GRDC Media
Growers looking to improve the effectiveness of furrow sowing on water-repellent sandplain soils can inspect new trials during a field walk hosted by the West Midlands Group (WMG) on Friday, June 29... The trials on Colin McAlpine's Badgingarra property have been established as part of Grains Research and Development Corporation (GRDC) supported non-wetting soils research conducted by the Department of Agriculture and Food (DAFWA)... "Winged points or seeding boots that help keep repellent soil out of the furrow, and wetting agents that help wet up repellent soil in the furrow are being investigated as possible methods to improve the efficacy of furrow sowing on repellent sands," Dr Davies said...
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Catalogue: GRDC Research Summaries
" Delivering agronomic strategies for water repellent soils in WA.. Existing agronomic options are available to manage water repellent soils including furrow sowing, use of soil wetters, spreading and incorporation of clay rich subsoil and alternative land use options... 3) An extension program designed to empower growers and grower groups to identify the severity of non-wetting soils, the likely impact on grain yield, and the profitability of management strategies including an assessment of the drivers, barriers and extent of grower practice change...
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Catalogue: GRDC Updates
Developing and assessing agronomic strategies for water repellent soils davies table 1.. It should be noted that the yield responses measured with paired cuts on water repellent areas were quite large compared to the average grain yield advantage for the winged point-paired row system across the whole paddock (200 kg/ha)... Recent research has shown that a topsoil clay content of 3% is sufficient to overcome topsoil water repellence where the organic carbon content is 1% but higher clay contents of 5-7% are required where the organic carbon content is higher at 1.5% (DAFWA Bulletin 4773, 2009)...
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