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Catalogue: GRDC Final Reports
The cost of soil acidity to agriculture is recognised as being great, especially in Western Australia where the most recent analysis estimates 30% of dryland agricultural soils have subsurface acidity - or are at high risk of developing subsurface acidity - which causes a decline in wheat yield of between 20 and 40% (GRDC Project UWA00081)... The most recent analysis estimates that 30% or 5-6 million hectares of dryland agricultural soils have subsurface acidity or are at high risk of developing subsurface acidity which causes a decline in wheat yield of between 20 and 40% (GRDC Project UWA00081)... The experience and machinery developed as a result of this work is currently being passed on and used by the SIP08 project UWA00081 and will be used where applicable by Wal Anderson's new GRDC project 'Enhancing paddock profitability - a collaborative diagnostic approach to cropping systems research'...
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Catalogue: GRDC Media
Subsurface acidity is a major constraint to crop and pasture productivity across Western Australia's grainbelt and is estimated to erode potential crop yields by 9 to 12 per cent, worth $500 million annually... About 14.25 million hectares of WA grainbelt soils are acidic or at risk of becoming acidic to the point of restricting crop yields, and lime use has increased in recent years to address acidic soils with low pH levels... Useful information for grain growers about subsurface acidity and liming is available in a Grains Research and Development Corporation (GRDC) Soil Acidity in WA Hot Topic, available at www.grdc.com.au/SoilAcidityWA ...
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Catalogue: GRDC Final Reports
pH measurements taken from wet and dry soils can vary if we measure the pH in water because the soil has a "background" salt concentration... To minimise the effect of salt concentration in soil on pH values, pH is now measured in 0.01 molar calcium chloride... As soil testing for phosphorus was originally conducted on the top 10 cm of soil, so the soil pH was only measured for the top 10 cm...
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