soil map units where 38H Puna hill soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Upolo |
| Landscape position | Soils of the lowlands and foothills - very slightly dissected landscapes |
| Soil parent material | from mainly scoria basalt of the Puapua Volcanics |
| Slope | Moderately steep to strongly rolling slopes |
| Surface outcrops | Surface locally stony. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 15cm gravelly loam with lumps of scoria. 35cm loamy gravel. on weathering scoria |
| Minimum effective rooting depth | <50cm |
| Soil pH (acidity) | Moderately acid (pH = 5.8) |
| Salinity | Non saline |
| Soil fertility under natural conditions | High fertility. Base saturation 60-70%. Exchangeable calcium (Ca), magnesium (Mg) values moderate. Exchangeable potassium (K) and available potassium (P) values low. |
| Soil moisture regime | Without dry season (Perudic moisture regime) |
| Susceptibility to drought | Weak dry season (1-2 months <100mm rainfall). Rainfall 2850-3500mm. |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | Never waterlogs |
| Susceptibility to flooding | Never floods |
