soil map units where 44S Fa'amasa 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 | Steep to very steep slopes of small cones |
| Surface outcrops | Surface stony and occasionally bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 15cm gritty silty clay loam. 12cm gravelly silty clay. on weathering scoria |
| Minimum effective rooting depth | <40cm |
| Soil pH (acidity) | Moderately acid (pH = 5.8) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate topsoil fertility, low in subsoil. Exchangeable potassium (K) and organic calcium (C) moderate in topsoil, very low in subsoil. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | No dry season. Rainfall 4375-5000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
