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Catalogue: GRDC Updates (West)
The aim of the following study was to acquire a unique, long-term (> 1 year) data set of N 2O emissions from a rainfed, cropped soil in a semi arid region and to investigate the relationship between N 2O emissions and other soil and environmental parameters... Some ability to make in-season tactical decisions when to graze or continue through to harvest would be valuable... The commodity prices are an important aspect of any decision to graze a cereal crop...
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Catalogue: GRDC Research Summaries
Recent work has shown nitrate adsorption to anion exchange sites slows nitrate leaching in soils with pH dependent positive charge... To achieve the objective, soil from long-term field trials will be analysed for carbon (C), nitrogen (N) and phosphorus (P) in measureable fractions and information obtained will be used to test model predictions using crop N & P uptake plus yield collected in long-term trials... The project output will include a revised soil module in the crop systems model, APSIM, based on measureable fractions of organic matter and knowledge of ratios of carbon (C), nitrogen (N) and phosphorus (P) in these fractions...
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Catalogue: GRDC Final Reports
The occurrence of high levels of salts, sodium and chlorides (Cl) in the northern grains region subsoils effectively reduces rooting depths, increases osmotic potential and chloride toxicity, and reduces the crop water use from the soil profile... The Decision Tree and toolkit developed in this project have become essential components of identifying and managing subsoil constraints (SSC) for advisers and growers... More recent research was carried out in project DNR00008 Advanced Techniques for Managing Subsoil Constraints...
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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: GRDC Research Summaries
Recent work has shown nitrate adsorption to anion exchange sites slows nitrate leaching in soils with pH dependent positive charge... To achieve the objective, soil from long-term field trials will be analysed for carbon (C), nitrogen (N) and phosphorus (P) in measureable fractions and information obtained will be used to test model predictions using crop N & P uptake plus yield collected in long-term trials... The project output will include a revised soil module in the crop systems model, APSIM, based on measureable fractions of organic matter and knowledge of ratios of carbon (C), nitrogen (N) and phosphorus (P) in these fractions...
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Catalogue: GRDC Final Reports
KASM integrates existing knowledge about potassium (K) nutrition at a level that allows a quantitative understanding of short and long-term crop responses and soil fertility changes following K fertiliser use in WA's cropping systems... The outputs from the project will be useful in delivering the project outcome: "By providing two nutrition expert systems to active agronomists, advisers and consultants, this project will allow WA grain growers to make better management decisions and improve the efficiency of fertiliser use across the approximately nine million hectares of cropping land in WA.".. The aim of the model is to influence rather than dictate decision-making by providing users with a 'feel' for the impact of various processes in the soil-plant system that impact on the K nutrition of crops...
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Catalogue: GRDC Media
A new soil test for phosphorus is showing considerable potential for use in Australian calcareous soils, with the help of a PhD project supported by growers and the Australian Government through the Grains Research and Development Corporation (GRDC)... The test, diffusive gradients in thin films (DGT), was originally developed for testing metal contamination in the soils and waterways of the United Kingdom, but with some modifications it has been found to correlate well with plant response to applied phosphorus in deficient Australian soils... Photo caption: "Dr Sean Mason prepares to test soil samples for available phosphorus" Dr Mason found that DGT readings were more accurate than other tests in calcareous soil types in laboratory trials...
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Catalogue: GRDC Research Summaries
The project acknowledges the importance and impact of advisers and uses advisers to achieve attitude change utilising the engagement and skill base of farmer groups... The project will result in a more resilient mixed farming sector with improved whole farm profitability, whole farm sustainability and whole farm ground cover... The project will be supported by and delivered across five NRM regions in South Australia......
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Catalogue: Ground Cover
With growers and researchers, the GRDC is embarking on a project that aims to lift water use efficiency by 10 per cent in five years Researchers and grower groups from around Australia gathered in Canberra recently to kick-start one of the GRDC's most ambitious national projects to date - that of increasing the water use efficiency (WUE) of Australia's grain growers by 10 per cent in the next five years. '.. Mr Kearns asked all researchers to start their projects by assessing the current WUEs of growers in their regions. ".. The initiative will hold similar annual meetings in different regions each year as a forum to share ideas, evaluate progress and discuss new technologies for improving WUE. GRDC Research Code BWD00012 More information: James Hunt, 02 6246 5066, james.hunt@csiro.au < Keep browsing 0 Responses to National approach to lift water use efficiency..
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Catalogue: GRDC Final Reports
Clinton Revell (Group Leader, Pasture Science).. Preliminary economic analyses for use of new serradella and biserrula varieties indicate increases in profit of between $13 and $71/ha on a typical WA wheatbelt farm... The first variety, Cadiz , has been widely adopted...
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