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clay rich subsoil

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Catalogue: GRDC Media
Growers need not use high rates of clay or expensive incorporation methods when claying non-wetting soils to improve yields, new Western Australian research suggests... Dr Davies said that in the latest trials, wheat yields improved by at least 0.2t/ha when growing season rainfall was at least 300mm and low rates of clay were incorporated to a shallow depth at sites including Meckering, Bolgart, Badgingarra, Binnu and Balla... Dr Davies said when moderate (150-300t/ha of clay-rich subsoil) and high rates of clay (300t/ha or more of clay-rich subsoil) were incorporated to a shallow depth, there was little additional yield advantage when compared to the lower clay rates...
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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 Media
Remediating sandy soils with clay-rich subsoil can often generate substantial crop yield improvements, providing appropriate methods are followed... The Grains Research and Development Corporation (GRDC) has just produced a new publication in which eight growers - including three from WA - share their stories about their use of clay in improving their soils and productivity... According to the GRDC, the millions of hectares of deep sand or sand over clay-rich subsoils which are used for agricultural production, mainly in SA and WA, present a range of challenges due to their poor water-holding capacity, inherent low fertility, extremes of pH, low levels of microbial activity and vulnerability to wind erosion...
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Catalogue: Ground Cover
Experience builds strategies for water-repellent soil.. Recent research indicates that some formulations only work on certain soil types, such as the forest loamy gravels or on firmer soils with reasonable clay content, and are less effective on repellent sands... The results indicate a 55 per cent chance of achieving a yield increase of 400kg/ha or more in year one...
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Catalogue: GRDC Media
New resource delves into the issue of claying Remediating sandy soils with clay-rich subsoil can generate substantial crop yield improvements, provided that appropriate methods are followed... The Grains Research and Development Corporation (GRDC) has just produced a new publication in which eight growers - including four from SA and one from Victoria - share their stories about their use of clay in improving their soils and productivity... It is critical that growers plan in detail each stage of the process and follow the best practice. "..
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Catalogue: GRDC Media
New resource delves into the issue of claying Remediating sandy soils with clay-rich subsoil can generate substantial crop yield improvements, provided that appropriate methods are followed... The Grains Research and Development Corporation (GRDC) has just produced a new publication in which eight growers - including four from SA and one from Victoria - share their stories about their use of clay in improving their soils and productivity... It is critical that growers plan in detail each stage of the process and follow the best practice. "..
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