soil map units where 30H Olomanu hill soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Upolo |
| Landscape position | Soils of the lowlands and foothills - moderately dissected landscapes |
| Soil parent material | from scoria basalt of the Salani Volcanics |
| Slope | Strongly rolling slopes |
| Surface outcrops | Surface occasionally littered with scoria boulders with common stones. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 10cm gravelly silty clay loam. 10cm gravelly silty clay. 20cm very gravelly silty clay. on coarse gravel |
| Minimum effective rooting depth | <75cm |
| Soil pH (acidity) | Moderately acid (pH = pH = 5.7) |
| Salinity | Non saline |
| Soil fertility under natural conditions | High fertility. Base saturation 73% in topsoil but low in subsoil. Base saturation, organic carbon (C) and exchangeable potassium (K) values high. |
| Soil moisture regime | With weak to strong dry season (Udic moisture regime) |
| Susceptibility to drought | Weak dry season (1-2 months <60cm rainfall). Rainfall 2750-3500mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
