soil map units where 83 Afiamalu silt loam is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| Landscape position | Soils of the uplands - moderately dissected landscapes |
| Soil parent material | from scoria basalt of the Salani Volcanics |
| Slope | Strongly rolling and rolling slopes |
| Surface outcrops | Surface locally bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 7cm peaty silt loam. 43cm silt loam. 40cm gritty silty clay loam. on gritty silty clay |
| Minimum effective rooting depth | >125cm |
| Soil pH (acidity) | Strongly acid (pH = 4.5) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Very low fertility. Base saturation very low. Topsoil high exchangeable potassium (K) and organic calcium (C) values but low in subsoil. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | No dry season. Rainfall 4375-5000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
