soil map units where 70 Tuave clay is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Upolo |
| Landscape position | Soils of the lowlands and foothills - strongly dissected landscapes |
| Soil parent material | from pahoehoe, aa, scoria and dykes of basalt of basalt of the Fagaloa Volcanics |
| Slope | Rolling slopes |
| Surface outcrops | Surface usually free of boulders or stones. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 31cm clay. 40cm stony clay. on weathered sub-angular rocks |
| Minimum effective rooting depth | <100cm |
| Soil pH (acidity) | Strongly acid (pH = 5.2) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Low to moderate fertility. Base saturation 15% topsoil, nil subsoil. Very low exchangeable potassium (K) and organic carbon (C). |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | No dry season. Rainfall 4000-5000+mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
