soil map units where 49H Gaegae hill soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| Landscape position | Soils of the lowlands and foothills - slightly dissected landscapes |
| Soil parent material | from mixed aa and pahoehoe basalt of the Mulifanua Volcanics |
| Slope | Moderately steep slopes |
| Surface outcrops | Surface very bouldery except where covered with ash. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 15cm bouldery peaty silty clay. 28cm very bouldery silty clay. on large boulders with silty clay |
| Minimum effective rooting depth | <50cm |
| Soil pH (acidity) | Strongly acid (pH = 5.2) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate to low fertility. Base saturation 16% in topsoil. Plant nutrients concentrated in topsoil. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | No dry season. Rainfall 5000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
