soil map units where 85H Tiavi hill soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Upolo |
| Landscape position | Soils of the uplands - moderately dissected landscapes |
| Soil parent material | from mixed aa and pahoehoe basalt of the Salani Volcanics |
| Slope | Moderately steep slopes |
| Surface outcrops | Surface locally stony and bouldery. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 10cm bouldery silty clay loam. 15cm silty clay loam. 150cm gritty clay with soft basalt blocks. |
| Minimum effective rooting depth | >125cm |
| Soil pH (acidity) | Strongly acid (pH = 4.5) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Low fertility. Base saturation 13% in topsoil, nil below. Exchangeable potassium (K) and organic calcium (C) high in topsoil, low below. |
| 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 |
