soil map units where 86S Mata'ana steepland soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Savaii |
| Landscape position | Soils of the uplands - moderately dissected landscapes |
| Soil parent material | from scoria, pahoehoe and aa basalt of the Salani Volcanics |
| Slope | Moderately steep to steep slopes |
| Surface outcrops | Surface (<30cm) continuous blanket of peat. No surface stones or boulders. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 15cm fibrous peat. 10cm loamy peat. 10cm gritty peaty loam. 25cm silty clay loam. 130cm silty clay. on weathered scoria |
| Minimum effective rooting depth | >125cm |
| Soil pH (acidity) | Slightly acid (pH = 3.8) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Very low fertility. Base saturation only 3% in topsoil , nil below topsoil, high organic calcium (C) and very high exchangeable potassium (K) values. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | No dry season. Rainfall >6000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
