soil map units where 26S Neiafu steepland soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Savaii |
| Landscape position | Soils of the lowlands and foothills - slightly dissected landscapes |
| Soil parent material | from scoria and basalt of the Mulifanua Volcanics |
| Slope | Steep long unbroken slopes |
| Surface outcrops | Large quantities of loose scoria and vesicular lava accumulating on lower slopes. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 13cm slightly gravelly clay loam. 33cm stony clay loam. on slightly weathered scoria |
| Minimum effective rooting depth | <50cm |
| Soil pH (acidity) | Slightly acid (pH = pH = 6.3) |
| Salinity | Non saline |
| Soil fertility under natural conditions | High fertility. Base saturation 100%. Exchangeable calcium (Ca), magnesium (Mg), potassium (K) values high. Moderate available phosphorus (P). |
| Soil moisture regime | With weak to strong dry season (Udic moisture regime) |
| Susceptibility to drought | Moderate to strong dry season (2-3 months <100mm rainfall). Rainfall 2000-3000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
