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water repellent

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Catalogue: GRDC Media
Clay tests vital in setting up soil productivity this summer.. DAFWA senior research officer at Esperance David Hall says claying increased crop yields in all years of the Dalyup trial, even in those seasons when there were no differences in crop establishment between clay and non-clay treatment... Mr Hall says there was a positive economic response from incorporating clay at all rates used in the long term Dalyup trials, but it took six or seven years to generate a return from the lowest rates of 50t/ha and 100t/ha...
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Catalogue: GRDC Media
Clay tests vital in setting up soil productivity this summer.. DAFWA senior research officer at Esperance David Hall says claying increased crop yields in all years of the Dalyup trial, even in those seasons when there were no differences in crop establishment between clay and non-clay treatment... Mr Hall says there was a positive economic response from incorporating clay at all rates used in the long term Dalyup trials, but it took six or seven years to generate a return from the lowest rates of 50t/ha and 100t/ha...
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Catalogue: GRDC Final Reports
The expression of water repellency under different tillage and stubble managements was evaluated to investigate anecdotal evidence that repellency disappears under zero-tillage and stubble retention... The results highlight the importance of evaluating water infiltration in the field to take into account not just the physical repellency of the soil, but to include all possible mechanisms of water entry... The results highlight the importance of evaluating water infiltration in the field and not just relying on laboratory measures of water repellency...
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Catalogue: Ground Cover
In this instalment of the Ground Cover matchmaker series highlighting advances made through grower-researcher collaboration, we look at how zero-till systems have been used to combat water repellence in sandy soils.. "Generally speaking, if you've got a sandy soil with a lot of organic matter in it, it will be quite highly repellent," says Dr Roper, who by then had been researching microbial degradation of waxes to improve water infiltration for a decade. ".. You would expect that the burnt-cultivated soil would have taken up much more water because it was less repellent, but when we measured water in the field the zero-till unburnt treatment had more water in the soil - and the least water was in the cultivated-burnt," Dr Roper says. "..
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Catalogue: Ground Cover
In this instalment of the Ground Cover matchmaker series highlighting advances made through grower-researcher collaboration, we look at how zero-till systems have been used to combat water repellence in sandy soils.. "Generally speaking, if you've got a sandy soil with a lot of organic matter in it, it will be quite highly repellent," says Dr Roper, who by then had been researching microbial degradation of waxes to improve water infiltration for a decade. ".. You would expect that the burnt-cultivated soil would have taken up much more water because it was less repellent, but when we measured water in the field the zero-till unburnt treatment had more water in the soil - and the least water was in the cultivated-burnt," Dr Roper says. "..
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Catalogue: Ground Cover
Rather than buying a spader immediately, Damian set up a water repellence amelioration trial in collaboration with Dr Stephen Davies from the Department of Agriculture and Food, Western Australia... It was enough to give Damian the confidence to expand his spading program and buy his own machine - a four-metre Farmax , capable of mixing the soil to a depth of 300 to 400mm... When Ground Cover caught up with Damian in July, he was hoping for a wet August after recording just 100mm of rain at that point: "We've grown accustomed to having a good season and then a poor one," he says. "..
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Catalogue: GRDC Updates (West)
KNIFE POINTS KNIFE POINTS.. Fine repellent dry soil 'boils' up in front of the almost vertical point face and runs behind the point into the seed slot.. The small wings behind the point push up the soil beside the point and increase the slope...
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Catalogue: Ground Cover
Road trip shares soil water repellence solutions.. The aim of the tours and booklet was to highlight the systems being used by growers across WA and strategies being investigated through research trials to alleviate problems associated with water-repellent soils... Soil-repellence researchers Dr Margaret Roper, from CSIRO, and Dr Stephen Davies, from DAFWA, say the sites visited on the tours and the grower case studies included in the RCSN-SEPWA booklet demonstrate that water-repellent soils can be successfully managed by using many, often completely different, options - ranging from minimum soil disturbance to mouldboard ploughing...
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Catalogue: Ground Cover
Road trip shares soil water repellence solutions.. The aim of the tours and booklet was to highlight the systems being used by growers across WA and strategies being investigated through research trials to alleviate problems associated with water-repellent soils... Soil-repellence researchers Dr Margaret Roper, from CSIRO, and Dr Stephen Davies, from DAFWA, say the sites visited on the tours and the grower case studies included in the RCSN-SEPWA booklet demonstrate that water-repellent soils can be successfully managed by using many, often completely different, options - ranging from minimum soil disturbance to mouldboard ploughing...
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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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