soil map units where 67 Sauaga clay is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| 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 to strongly rolling slopes |
| Surface outcrops | Surface occasionally bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 61cm clay. on clay with weathering rock at 120cm |
| Minimum effective rooting depth | >125cm |
| Soil pH (acidity) | Slightly acid (pH = 6.1) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate fertility. Base saturation 50-70% topsoil, 30% in subsoil. Exchangeable potassium (K) and organic calcium (C) values moderate. Available potassium (P) low to moderate. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Very weak to no dry season (rarely 1 month <100mm rainfall). Rainfall 2850-4500mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
