soil map units where 29H A'ana 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 bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 13cm bouldery clay. 23cm bouldery and stony clay. on very bouldery clay |
| Minimum effective rooting depth | <50cm. Note boulders. |
| Soil pH (acidity) | Slightly acid (pH = pH = 6.5) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Fertile. Base saturation 80-100%. High exchangeable potassium (K). Soil humus source of K. |
| Soil moisture regime | With weak to strong dry season (Udic moisture regime) |
| Susceptibility to drought | Weak dry season (1-2 months <60mm rainfall). Rainfall 2875-3250mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
