Midslope - Sand over Bleached Sand (Dryland)
This site is defined as being largely of the G3-2 or G3-b soil type, or thick sand over clay that has formed on outwash sediments. These soil types consist of sandy topsoils with organic matter staining in the A1 horizon extending to a bleached sandy A2 horizon. They are generally low in fertility, prone to compaction and water-repellence.
Rooting depth of the soil type without compaction is largely unrestricted to 75 cm but in reality compaction from intensive land use can restrict rooting depth to shallower depths of around 15-25 cm for where permanent pastures are being grown.
Due to the textural nature of the soil nutrient retention and soil moisture holding capacity are limited. A range of nutrient deficiencies are possible (eg. potassium, sulphur, zinc, copper and manganese) and require correction in production situations. Due to the low pH and the presence of aluminium variably in the landscape aluminium toxicity is noted as a risk, but more likely at depths beyond the conventional rooting depth of a pasture sward.
Further information on G3 soils can be found on page 194 of The Soils of Southern South Australia, Part 1 or Part 2.
Detailed representative soil profile date is available for more than 1100 locations around South Australia and can be accessed through Nature Maps with a hand guide for using data sheets also available. A localised soil characterisation site data sheet provide indicative chemical analysis of a G3 soil type.
Mosquito Hill (Dryland) – Midslope - Sand over Bleached Sand summed chart
Mosquito Hill (Dryland) – Midslope - Sand over Bleached Sand stacked chart
Mosquito Hill (Dryland) – Midslope - Sand over Bleached Sand soil temperature chart