This is Version 2 of the Australian Soil Clay Content product of the Soil and Landscape Grid of Australia.<br><br> It supersedes the Release 1 product that can be found at <a href="https://doi.org/10.4225/08/546EEE35164BF">https://doi.org/10.4225/08/546EEE35164BF</a>.<br></br> The map gives a modelled estimate of the spatial distribution of clay in soils across Australia.<br></br> <p>The Soil and Landscape Grid of Australia has produced a range of digital soil attribute products. Each product contains six digital soil attribute maps, and their upper and lower confidence limits, representing the soil attribute at six depths: 0-5&nbsp;cm, 5-15&nbsp;cm, 15-30&nbsp;cm, 30-60&nbsp;cm, 60-100&nbsp;cm and 100-200&nbsp;cm. These depths are consistent with the specifications of the GlobalSoilMap.net project - <a href="https://esoil.io/TERNLandscapes/Public/Pages/SLGA/Resources/GlobalSoilMap_specifications_december_2015_2.pdf">GlobalSoilMaps</a>. The digital soil attribute maps are in raster format at a resolution of 3 arc sec (~90 x 90&nbsp;m pixels).<br> Detailed information about the Soil and Landscape Grid of Australia can be found at - <a href="https://esoil.io/TERNLandscapes/Public/Pages/SLGA/index.html">SLGA</a><br /><br /> <ul style="list-style-type: disc;"><li>Attribute Definition: 2&nbsp;μm mass fraction of the less than 2&nbsp;mm soil material determined using the pipette method;</li> <li>Units: %;</li> <li>Period (temporal coverage; approximately): 1950-2021;</li> <li>Spatial resolution: 3 arc seconds (approx 90&nbsp;m);</li> <li>Total number of gridded maps for this attribute: 18;</li> <li>Number of pixels with coverage per layer: 2007M (49200 * 40800);</li> <li>Data license : Creative Commons Attribution 4.0 (CC BY);</li> <li>Target data standard: GlobalSoilMap specifications;</li> <li>Format: Cloud Optimised GeoTIFF.</li></ul>

Soil collection and analysis of chemical and physical attributes was carried out at the Great Western Woodlands site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

Soil collection and analysis of chemical and physical attributes was carried out at the Alice Mulga site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

Soil collection and analysis of chemical and physical attributes was carried out at the Calperum Mallee site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

Soil collection and analysis of chemical and physical attributes was carried out at the Daintree Rainforest, Cape Tribulation site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

This dataset lists soil profile observations described in the rangeland sites across Australia by the TERN Surveillance Monitoring team, using standardised AusPlots methodologies.<br> Soil profile characteristics are observed and collected at each site as part of the AusPlots Soil and Landscapes methods. For each soil profile sampled, soil horizon's colour, electrical conductivity, effervescence, soil ped characteristics, soil pH, texture and coarse fragments characteristics are described as part of the AusPlots Soil characterisation to 1&nbsp;m+ method. Soil specimens for the soil horizons are also collected for preservation.<br>

Soil collection and analysis of chemical and physical attributes was carried out at the Warra Tall Eucalypt site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

Soil collection and analysis of chemical and physical attributes was carried out at the Litchfield Savanna site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

Soil collection and analysis of chemical and physical attributes was carried out at the Whroo Dry Eucalypt site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.

Soil collection and analysis of chemical and physical attributes was carried out at the Karawatha Peri-Urban site to provide contextual data for the Biomes of Australian Soil Environments (BASE) soil microbial diversity project.