Back to: A Land Capability Study of the Rural City of Marong
Map Unit: | Tertiary fan, moderate slope, 2 | Map Unit Symbol: | Tfc2 |
% of Study Area: | 0.04 |
Parent material age: | Tertiary | Depth seasonal watertable: | > 5 m |
Lithology: | Sedimentary | Potential recharge to groundwater: | Moderate |
Landform Pattern: | Undulating hills | Flooding risk: | Nil |
Element: | Slope | Drainage: | Well drained |
Slope common: | 20% | Depth to hardrock: | > 1.5 m |
Slope range: | 10-32% | ||
Rock outcrop: | 0% |
Land degradation: | Water erosion | Wind erosion | Salting | Acidification | |
Sheet/rill | Gully | ||||
Susceptibility | Very high | Moderate | High | Low | High |
Incidence | High | Moderate | High | Low | Low |
Permeability (measured - average, range): | 510, 330 - 650 mm/day |
Permeability (estimated): | - |
Available water capacity: | 287 mm H2O |
Linear shrinkage (B horizon): | 12.4% |
A1 | 0-14 cm | Brownish black (10YR3/2) fine sandy loam, weak structure, subangular blocky peds 5-10 mm, rough fabric, moderately weak consistence, many medium sized subangular metamorphic and quartz gravel fragments, moderate organic matter, pH 6.2. Clear transition to |
A2 | 14-44 cm | Dull yellowish brown (10YR5/4) hardsetting fine sandy loam, bleached (10YR7/4) when dry, massive, earthy fabric, moderately weak consistence, a few medium sized subangular metamorphic and quartz gravel fragments, pH 5.4. Abrupt transition to |
B | 45-112 + cm | Dull yellow orange (10YR6/7) medium day, abundant medium sized distinct grey, orange, red and white mottles, moderate structure, subangular blocky peds 5-10 mm, rough fabric, moderately firm consistence, many coarse angular metamorphic and quartz fragments, pH 4.6. |
Factual Key (Northcote): | Dy 3.41 |
Australian Soil Classification: | Bleached-Mottled, Yellow, Kurosol; deep, thick, loamy, moderately gravelly |
Unified Soil Group: | CL |
Horizon | pH | Gravel % | E.C. (salts) | Nutrient Status | P | K | Al | Organic Matter | Dispersibility |
A1 | 6.2 | 44 | VL | L | S | S | S | M | H |
A2 | 5.3 | 19 | VL | L | S | S | S | L | H |
B | 4.6 | 34 | L | L | S | S | S | VL | L |
Land Use | Class | Major limiting feature(s)/ landuse |
Agriculture (CTS values) | C3T4S5 | Very susceptible to sheet/rill erosion |
Effluent disposal (septic tanks) | 3 | Moderate slope |
Farm dams (earthen) | 4 | Moderately slope, low suitability of subsoils, lack of dispersion in subsoil, rapid permeability, high susceptibility to slope failure |
Building foundations - slab | 4 | Moderate slope, high risk of slope failure |
Building foundations - stumps/footings | 4 | High risk of slope failure |
Secondary roads | 4 | Moderate slope, high risk of slope failure |
Urban residential | 4 | Secondary roads, building foundations |
Rural residential | 4 | Farm dams, secondary roads, building foundations |