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Ameliorant

Catalogue: GRDC Factsheets
Before biochar can be widely adopted in agriculture, better understanding is needed of its properties and how it interacts - both positively and negatively - with the soil... Gas chambers are used to measure greenhouse gas emissions from a soil amended with biochar in Western Australia... Applications of biochar to soil have demonstrated improvements in the physical structure of the soil by: increasing water-holding capacity (in sandy soils); reducing the tensile strength of hardsetting soil; altering the soil thermal properties; and improving physical conditions for increased earthworm populations...
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Catalogue: GRDC Factsheets
Before biochar can be widely adopted in agriculture, better understanding is needed of its properties and how it interacts - both positively and negatively - with the soil... Gas chambers are used to measure greenhouse gas emissions from a soil amended with biochar in Western Australia... Applications of biochar to soil have demonstrated improvements in the physical structure of the soil by: increasing water-holding capacity (in sandy soils); reducing the tensile strength of hardsetting soil; altering the soil thermal properties; and improving physical conditions for increased earthworm populations...
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Catalogue: GRDC Factsheets
Before biochar can be widely adopted in agriculture, better understanding is needed of its properties and how it interacts - both positively and negatively - with the soil... Gas chambers are used to measure greenhouse gas emissions from a soil amended with biochar in Western Australia... Applications of biochar to soil have demonstrated improvements in the physical structure of the soil by: increasing water-holding capacity (in sandy soils); reducing the tensile strength of hardsetting soil; altering the soil thermal properties; and improving physical conditions for increased earthworm populations...
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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: GRDC Updates
Potential yield was estimated by a modified French and Schultz approach using monthly rainfall for each site and season... Most sites showed no yield increase in the season of application... A range of grain yield responses to gypsum were measured from a 13 percent decrease to over 100 per cent increase...
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Catalogue: Ground Cover
Image of a soil pit showing lime injection.. Soil pit showing where lime (stained purple) has been injected into the soil... The trial was established in 2001 at South Bodallin in the eastern WA wheatbelt when limesand was injected to a depth of 25 to 30cm, using air to blow the lime down behind a set of deep-ripping tynes...
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Catalogue: GRDC Final Reports
A Subsoil Reference Manual produced as part of this project provides important information in a relatively easy to follow format... Possible reasons underlying the lack of response to subsoil amelioration in the current project were assessed in a glasshouse trial using intact cores (which maintained the chemical/physical integrity of the soil profile)... Significant correlations between different subsoil factors were found, supporting observations in a previous study that was limited to a single district (Nuttall et al. 2003)...
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Catalogue: GRDC Final Reports
Simulations with an Agricultural Production Systems simulator (APSIM) were used to understand the large variation in wheat response commonly observed following subsoil amelioration... A more detailed identification of subsoil constraints can be achieved using spatially dense information from gamma-ray emission and EM38 surveys... Spatial estimates backed by measurements showed that only about a fifth of the paddock needed deep liming...
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