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sandy soil

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Catalogue: GRDC Final Reports
Transient salinity in soils, characterised by high concentration of salts in the subsoil, varies with depth and changes throughout the season in response to rainfall, surface evaporation, water use by vegetation and the leaching fraction (hydraulic conductivity) of the clay layer... Experiments in our project have shown that transient salinity (accumulation of salt in root zone layers, not influenced by watertable) affects crop yield and growth in dry land regions mainly by reducing water use efficiency of crops through osmotic effect, although toxic effects of individual ions such as sodium can also cause yield reduction... The results indicate that gypsum application improves leaching of salts...
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Catalogue: Ground Cover
A Western Australian study shows that applying biochar made from wheat chaff and eucalyptus wood may have some negative effects on sandy soils.. To assess the impact of biochar on nitrogen leaching in a sandy soil from Meckering, WA, Mr Dempster ran another glasshouse trial and compared the results to those achieved by adding clay - another ameliorant being used by some growers to enhance soil fertility... The results showed yield decreased significantly from 2.1t/ha to 1.7t/ha when biochar was banded into the subsoil...
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Catalogue: GRDC Final Reports
Although biochar addition to soil did decrease inorganic N leaching, soil N mineralisation either decreased or did not change... The application of pyrolysed organic matter or biochar to soil can remediate decreased SOM and sequester C. The application of biochar to soil has also been shown to improve soil fertility and enhance yields of crops such as maize, wheat and peanuts... As biochar addition to soil can increase microbial community size and activity, previous research has hypothesised that this mechanism may be responsible for enhanced N mineralisation rates and contributes to the demonstrated improvements of N fertiliser use efficiency (up to 90%) in glasshouse-based agronomic research...
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Catalogue: Ground Cover
[Photo (left) by Evan Collis: Ian Stanley is trialling biochar made from wheat straw to improve the condition of his sandy soils.].. Working with Professor Syd Shea of Notre Dame University and independent Melbourne engineer and businessman Peter Burgess, Mr Stanley has been trialling biochar - a fine-grained charcoal high in organic carbon, thought to improve soil fertility - for the past four years... "We have a no-till operation and apart from its small value as a ground cover, wheat straw has no value, so biochar made from this could provide farmers with another source of revenue," Mr Stanley says...
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Catalogue: Ground Cover
Claying improves the productivity of sandy soils.. Despite years of clay being spread over sandy soils to improve water-holding capacity, little is known about its impact on the soils' nutrient content... As part of the GRDC-funded More Profit from Crop Nutrition (MPCN) initiative, researchers from the Department of Agriculture and Food, WA (DAFWA) and Murdoch University are exploring the potential to improve crop nutrition after claying...
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Catalogue: GRDC Factsheets
Clay spreading or delving can significantly improve yields of sandy soils but it is vital that the process is performed correctly... Poor root exploration into the subsoil caused by a distinct separation between the spread/delved soil and the layer below and by not addressing fertility and low plant available water in bleached subsoils... The clay content of a soil can be estimated by taking a handful of the soil, adding water and working it into a ball until it is smooth, and then squeezing it out into a ribbon about 2-3 millimetres thick...
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Catalogue: Ground Cover
Claying improves the productivity of sandy soils.. Despite years of clay being spread over sandy soils to improve water-holding capacity, little is known about its impact on the soils' nutrient content... As part of the GRDC-funded More Profit from Crop Nutrition (MPCN) initiative, researchers from the Department of Agriculture and Food, WA (DAFWA) and Murdoch University are exploring the potential to improve crop nutrition after claying...
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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: Ground Cover
Primary Industries and Regions South Australia (PIRSA) soil and land management consultant David Davenport, from the department's Rural Solutions SA division, says there are at least one million hectares of land in SA alone that would benefit from amelioration of sandy soils... "Sandy soils have several known constraints including water repellence, compaction, low fertility and low water-holding capacity," he says... Mr Davenport says there are a range of different amelioration options that growers can use to overcome one or more of these constraints including spading, deep nutrition, incorporation of organic matter and the addition of clay...
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