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Ameliorant

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
"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 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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Catalogue: GRDC Media
Moisture retention and VRT paying off for Egans.. To improve their profitability and productivity, Scaddan growers Gavin and Elaine Egan pay keen attention to summer weed control and in recent seasons have introduced variable-rate technology (VRT) for application of inputs... In 2012, the Egans returned to a blanket rate in their fertiliser applications after a hailstorm at the end of 2011 wiped out most of their cereals, leaving little harvest data for the yield mapping on which VRT applications are based...
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Catalogue: GRDC Media
To improve their profitability and productivity, Scaddan growers Gavin and Elaine Egan pay keen attention to summer weed control and in recent seasons have introduced variable-rate technology (VRT) for application of inputs... In 2012, the Egans returned to a blanket rate in their fertiliser applications after a hailstorm at the end of 2011 wiped out most of their cereals, leaving little harvest data for the yield mapping on which VRT applications are based... Depending on the final results of on-farm gypsum and lime trials at Scaddan, the Egans will also consider using variable application rates of gypsum and lime tailored to different soil types...
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Catalogue: GRDC Final Reports
Through targeted research and review, the project was able to deliver key management strategies to prevent, ameliorate and manage subsoil constraints and demonstrate the long-term benefits of these on productivity and profitability... The project has clearly demonstrated the long-term benefits from ameliorating induced constraints such as acidity and compaction, with cereal yield benefits commonly of the order of 6-40%... The project has demonstrated the long-term benefits that accrue from maintaining soils in good condition, providing farming system and sustainability benefits...
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Catalogue: GRDC Final Reports
From an environmental perspective, this project has provided - and will continue to provide - benefits to improving the physical, chemical and biological components of the soil resource... A number of the field trials conducted in this project were implemented using new technology to address subsoil acidity... The project has clearly shown that subsoil acidity and compaction are widespread within the region and trials conducted have demonstrated the range of responses to ameliorating these constraints...
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Catalogue: Ground Cover
A pit face showing the effects of soil redistribution after tillage in a GRDC-funded project at Badgingarra... The imaging is providing more information about how different tillage practices mix the soil through their working depth... "We have a general idea about how inverting the soil will affect water repellence, weed establishment, the seedbed, subsoil compaction and crop emergence," he says...
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Catalogue: Ground Cover
A pit face showing the effects of soil redistribution after tillage in a GRDC-funded project at Badgingarra... The imaging is providing more information about how different tillage practices mix the soil through their working depth... "We have a general idea about how inverting the soil will affect water repellence, weed establishment, the seedbed, subsoil compaction and crop emergence," he says...
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