soil map units where 66V Papaloa steepland soils, very steep phase 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, scoria and dykes of basalt of basalt of the Fagaloa Volcanics |
| Slope | Very steep to precipitous |
| Surface outcrops | Surface rough and rocky, broken by sheer bluffs. |
| Brief soil profile description | - |
| Soil profile texture | 15cm very stony clay. 15cm weathering basaltic rock with clay. on soft weathered rock |
| Minimum effective rooting depth | <50cm |
| Soil pH (acidity) | Slightly acid (pH = 6.0) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate fertility. Base saturation 50-70% topsoil, 30% in subsoil. Exchangeable potassium (K) and organic calcium (C) values moderate. Available potassium (P) low to moderate. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Very weak to no dry season (<1 month <100cm rainfall). Rainfall 3250-5000mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
