SLGA: Soil and Landscape Grid of Australia (Soil Attributes) (CSIRO/SLGA)

The Soil and Landscape Grid of Australia (SLGA) is a comprehensive dataset
of soil attributes across Australia at 3 arc-second resolution (~90m
pixels). The surfaces are the outcomes from modelling that describe the
spatial distribution of the soil attributes using existing soil data and
environmental covariates. See Viscarra Rossel et al (2015)
for further details. The SLGA can be used in studies of vadose zone
processes, including solute transport, groundwater and nutrient fluxes
beyond the root zone, as well as a wide spectrum of ecological,
hydrological, and broader environmental applications.

Each product contains six digital soil attribute maps and their upper and
lower confidence limits, representing the soil attribute at six depths:
0-5cm, 5-15cm, 15-30cm, 30-60cm, 60-100cm, and 100-200cm. These depths and
soil attributes are consistent with the specifications of
GlobalSoilMap.

This collection has 12 images. Ten of them contain data for GSM primary
soil attributes; the other two contain regolith depth and soil depth GSM
attributes.

| Attribute | Description | Code | # of Bands |
|––––––––––––––––––––|—————————————————————————————————————————––|——|————|
| Bulk Density (whole earth) | Bulk density of the whole soil (including coarse fragments) in mass per unit volume by a method equivalent to the core method | BDW | 18 |
| Organic Carbon | Mass fraction of carbon by weight in the < 2mm soil material as determined by dry combustion at 900 Celsius | SOC | 18 |
| Clay | < 2μm mass fraction of the <2mm soil material determined using the pipette method | CLY | 18 |
| Silt | 2-20μm mass fraction of the < 2mm soil material determined using the pipette method | SLT | 18 |
| Sand | 20μm - 2mm mass fraction of the < 2mm soil material determined using the pipette method | SND | 18 |
| pH (CaCl2) | pH of 1:5 soil/0.01M calcium chloride extract | pHc | 18 |
| Available Water Capacity | Available water capacity computed for each of the specified depth increments | AWC | 18 |
| Total Nitrogen | Mass fraction of total nitrogen in the soil by weight | NTO | 18 |
| Total Phosphorus | Mass fraction of total phosphorus in the soil by weight | PTO | 18 |
| Effective Cation Exchange Capacity | Cations extracted using barium chloride (BaCl2) plus exchangeable H + Al | ECE | 18 |
| Depth of Regolith | Depth to hard rock. Depth is inclusive of all regolith. | DER | 3 |
| Depth of Soil | Depth of soil profile (A & B horizons) | DES | 3 |