soil map units where 52H Tafua hill soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Savaii |
| Landscape position | Soils of the lowlands and foothills - moderately dissected landscapes |
| Soil parent material | from lithivitric tuffs and ash of the Vini Volcanics |
| Slope | Strongly rolling to moderately steep slopes |
| Surface outcrops | Surface locally gravelly. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 10cm silty clay loam. 20cm gritty clay loam. 10cm gravelly sandy loam. on basic tuff |
| Minimum effective rooting depth | <50cm |
| Soil pH (acidity) | Slightly acid (pH = 6.1) |
| Salinity | Non saline |
| Soil fertility under natural conditions | High fertility. Base saturation 50-80%. Exchangeable potassium (K) low in topsoil, moderate in subsoil. Available potassium (P) moderate to low. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Very weak dry season. Rainfall 3000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
