soil map units where 78S Savai'i steepland soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Savaii |
| Landscape position | Soils of the uplands - very slightly dissected landscapes |
| Soil parent material | from scoria and pahoehoe basalt of the Puapua Volcanics |
| Slope | Steep to very steep slopes |
| Surface outcrops | Surface bouldery with large scoria blocks. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 15cm fibrous peat with boulders. 5cm bouldery peaty silt loam. 10cm very bouldery silt loam. on very bouldery loamy gravel |
| Minimum effective rooting depth | >100cm |
| Soil pH (acidity) | Strongly acid (pH = 5.2) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Low fertility |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | No dry months. Rainfall 6250mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
