soil map units where 17a Matavanu stony gravel is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Savaii |
| Landscape position | Soils of the lowlands and foothills - very slightly dissected landscapes |
| Soil parent material | from mainly pahoehoe basalt of the Aopo Volcanics |
| Slope | Undulating to rolling slopes |
| Surface outcrops | Smooth or broken sheet of pahoehoe lava with local patches of aa. |
| Brief soil profile description | - |
| Soil profile texture | 15cm coarse gravel. on cinders with coarse sand |
| Minimum effective rooting depth | <20cm |
| Soil pH (acidity) | Slightly acid (pH = pH = 6.0) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate to low fertility. Minimal weathering. |
| Soil moisture regime | With weak to strong dry season (Udic moisture regime) |
| Susceptibility to drought | Weak to very weak dry season (1-2 months <100mm rainfall). Rainfall 2750-4375mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
