soil map units where 35a Togitogiga stony humic silt loam is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| Landscape position | Soils of the lowlands and foothills - very slightly dissected landscapes |
| Soil parent material | from mainly pahoehoe basalt of the Puapua Volcanics |
| Slope | Usually flattish to undulating |
| Surface outcrops | Surface often smooth but deeply fissured. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 5cm sandy loamy peat. 13cm peaty sandy loam. on basalt |
| Minimum effective rooting depth | <20cm |
| Soil pH (acidity) | Moderately acid (pH = pH = 5.8) |
| Salinity | Non saline |
| Soil fertility under natural conditions | High fertility. Topsoils Base saturation 80-100%. Base saturation, organic carbon (C) values high. Subsoils low in exchangeable potassium (K), organic carbon (C). |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Very weak dry season (1 month <100mm rainfall). Rainfall 3250-4375mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
