soil map units where 39S Tanutala steepland soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| Landscape position | Soils of the lowlands and foothills - very slightly dissected landscapes |
| Soil parent material | from mainly scoria basalt of the Puapua Volcanics |
| Slope | Steep to very steep slopes |
| Surface outcrops | Surface stony and occasionally bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 10cm bouldery clay loam. 50cm gravelly clay loam. on weathering scoria |
| Minimum effective rooting depth | <60cm |
| Soil pH (acidity) | Slightly acid (pH = 6.2) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate to high fertility |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Weak dry season (1-2 months <100mm rainfall). Rainfall 2850-3500mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
