66S Papaloa steepland soils

soil map units where 66S Papaloa steepland soils is dominant

Soil properties

Property Value
Geographic distribution Samoa
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 Moderately steep to steep slopes
Surface outcrops Surface usually bouldery and rocky. Small areas very bouldery. No rock outcrops.
Brief soil profile description -
Soil profile texture 20cm stony clay. 20cm very stony clay. on weathered basaltic 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

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