soil map units where 33 Vaipouli silty clay loam is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Savaii |
| Landscape position | Soils of the lowlands and foothills - strongly dissected landscapes |
| Soil parent material | from pahoehoe, aa, scoria and dykes of basalt of the Fagaloa Volcanics |
| Slope | Smoothly undulating slopes |
| Surface outcrops | Only a few rocks or boulders at surface. |
| Brief soil profile description | - |
| Soil profile texture | 46cm clay. 20cm sandy clay. on rubbly clay with weathering andesitic basalt |
| Minimum effective rooting depth | <75cm |
| Soil pH (acidity) | Moderately acid (pH = pH = 5.7) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate fertility. Base saturation 100% in topsoil and 58% in subsoil. Base saturation, organic carbon (C) and exchangeable potassium (K) values moderate to low under farmed conditions. |
| Soil moisture regime | With weak to strong dry season (Udic moisture regime) |
| Susceptibility to drought | Weak dry season (1-2 months <100mm rainfall). Rainfall 2750-3500mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
