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 |