soil map units where 43S Olo steepland soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| Landscape position | Soils of the lowlands and foothills - slightly dissected landscapes |
| Soil parent material | from scoria basalt of the Mulifanua Volcanics |
| Slope | Moderately steep to steep slopes |
| Surface outcrops | Surface mainly stony and bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 15cm slightly stony silty clay. 20cm stony silty clay. on bouldery silty clay |
| Minimum effective rooting depth | <70cm |
| Soil pH (acidity) | Slightly acid (pH = 6.1) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate fertility. Moderate values for exchangeable potassium (K) and organic calcium (C) in topsoil and low in subsoil. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Very weak dry season (1 month <60mm rainfall). Rainfall 3250-4375mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
