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soil amelioration

Catalogue: GRDC Final Reports
In a recent survey 96% of growers indicated their knowledge about soil health had increased as a result of this project; 94% indicated they were better at making decisions for their business regarding soil health and 91% indicated information from the Liebe Group had been useful for changing farm practices... Professor Daniel Murphy, of UWA, analysed results from the Liebe Group's long term Soil Biology Trial, which has been measuring soil organic carbon build up since 2003, and the results of this analysis have provided growers with an indication of realistic soil organic carbon levels that can be targeted... Seven fact sheets about soil amelioration have been produced. . They contain concise and practical information to be used as starting points for growers investigating soil amelioration options...
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Catalogue: GRDC Media
"Currently only a small proportion of growers test soils to this depth, but it is necessary to provide the information they need to help them decide whether to apply lime before or after mouldboard ploughing or spading," he said... "After mouldboard ploughing or spading, but before seeding, growers should ideally go back and sample soils a second time to a depth of 20cm to help them assess soil nutrition requirements - particularly for phosphorus and potassium... "If growers do not have enough time to do nutrient testing between mouldboard ploughing or spading, and seeding, they need to make sure they test for nutrient levels, as well as pH, when soil testing the first time."..
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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 Research Summaries
Finding the pieces that maximise water use efficiency.. The variation within the strips can be used to tease out soils that are more or less responsive to ameliorative treatments... There are also opportunities to develop other products from the soils and geophysics data sets that will help farmers increase their water use efficiency through improved recognition and remediation of constraints...
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Catalogue: GRDC Research Summaries
In response to 10 years of climatic variability and cost/price pressures the growers in the Liebe Group area (Shires of Coorow, Dalwallinu, Perenjori and Wongan-Ballidu) have identified the need for a greater understanding of soil water dynamics, soil health and its effect on crop resilience, specific to our area... The local information generated through this project will allow growers to make more informed decisions so they can react quickly to change and develop more flexible and sustainable farming systems... Results of the trial indicate that growers trying to build carbon for a carbon market could achieve a maximum of 1 t/ha per year (until soil reaches its maximum capacity) on a sand at Buntine only if they added large amounts of biomass, which is unlikely to be economical...
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Catalogue: GRDC Research Summaries
In response to 10 years of climatic variability and cost/price pressures the growers in the Liebe Group area (Shires of Coorow, Dalwallinu, Perenjori and Wongan-Ballidu) have identified the need for a greater understanding of soil water dynamics, soil health and its effect on crop resilience, specific to our area... The local information generated through this project will allow growers to make more informed decisions so they can react quickly to change and develop more flexible and sustainable farming systems... Results of the trial indicate that growers trying to build carbon for a carbon market could achieve a maximum of 1 t/ha per year (until soil reaches its maximum capacity) on a sand at Buntine only if they added large amounts of biomass, which is unlikely to be economical...
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Catalogue: GRDC Media
Furrow sowing often worsens water repellence.. New research findings confirm grower observations that Western Australia's most common seeding technique - furrow sowing using knife points and press wheels - often exacerbates water repellence on sandplain soils... "But recent evidence shows this technique can in some circumstances actually cause water repellent soil to become concentrated with the seed and fertiliser in the base of the furrow," he said "This may be a result of the flow of dry, water repellent soil around the knife point and into the slot ahead of the closer plate and press wheel...
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