Back to: A Land Capability Study of the Rural City of Marong
Map Unit: | Quaternary basalt, very gentle slope, rocky | Map Unit Symbol: | Qbr |
% of Study Area: | 2.7 |
Parent material age: | Quaternary | Depth seasonal watertable: | > 5 m |
Lithology: | Basalt | Potential recharge to groundwater: | Very high |
Landform Pattern: | Lava plain | Flooding risk: | Nil |
Element: | Slope | Drainage: | Rapidly drained |
Slope common: | 2 % | Depth to hardrock: | 0.2 m |
Slope range: | 0-3 % | ||
Rock outcrop: | 40-50% |
Land degradation: | Water erosion | Wind erosion | Salting | Acidification | |
Sheet/rill | Gully | ||||
Susceptibility | Moderate | Very low | Low | Low | Low |
Incidence | Low | Nil | Low | Nil | Low |
Permeability (measured - average, range): | 2070, 1161 - 3091 mm/day |
Permeability (estimated): | - |
Available water capacity: | 38 mm H2O |
Linear shrinkage (B horizon): | N.A. (Low - estimated) |
A | 0 -12 cm | Dark reddish brown (5YR3/3) clay loam, weak structure, subangular blocky peds 2-5 mm, smooth fabric, moderately firm consistence, a few coarse basalt fragments, moderate organic matter content, pH 6.0. Clear transition to |
C | 12 + cm | Rock |
Factual Key (Northcote): | Um6.43 (major), Dr2.13 (minor) |
Australian Soil Classification: | Lithic, Leptic, Rudosol; shallow, medium, clay loamy, non-gravelly |
Unified Soil Group: | CL |
Horizon | pH | Gravel % | E.C. (salts) | Nutrient Status | P | K | Al | Organic Matter | Dispersibility |
A | 6.0 | 6.3 | VL | L | D | S | S | M | L |
Land Use | Class | Major limiting feature(s)/ landuse |
Agriculture (CTS values) | C3T2S5 | Shallow depth to hardrock, very low available water capacity, high gravel/stone/boulder content |
Effluent disposal (septic tanks) | 5 | Shallow depth to hardrock, very rapid permeability – risk of polluting groundwater |
Farm dams (earthen) | 5 | Shallow depth to hardrock, very low suitability of subsoil, very rapid permeability |
Building foundations - slab | 5 | Shallow depth to hardrock |
Building foundations - stumps/footings | 5 | Shallow depth to hardrock |
Secondary roads | 5 | Shallow depth to hardrock |
Urban residential | 5 | Secondary roads, building foundations |
Rural residential | 5 | Farm dams, effluent disposal, secondary roads, building foundations |