soil map units where 71S Lata steepland soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Upolo |
| Landscape position | Soils of the lowlands and foothills - strongly dissected landscapes |
| Soil parent material | from pahoehoe, aa and dykes of basalt of basalt of the Fagaloa Volcanics |
| Slope | Moderately steep to steep slopes |
| Surface outcrops | Surface stony, occasionally bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 8cm clay. 48cm stony clay. on weathering basaltic rocks with some clay |
| Minimum effective rooting depth | <75cm |
| Soil pH (acidity) | Strongly acid (pH = 5.1) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate fertility. Base saturation 65% topsoil, 35% subsoil. Exchangeable potassium (K) very high, very low in subsoil. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Very weak to no dry season (seldom 1 month <100m rainfall). Rainfall 3250-5000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
