21 Sasina stony and bouldery silty clay loam

soil map units where 21 Sasina stony and bouldery silty clay loam is dominant

Soil properties

Property Value
Geographic distribution Savaii
Landscape position Soils of the lowlands and foothills - very slightly dissected landscapes
Soil parent material from mainly pahoehoe basalt of the Puapua Volcanics
Slope Undulating to rolling slopes
Surface outcrops Very rugged surface with many angular lava blocks.
Brief soil profile description -
Soil profile texture 3cm stony silty clay loam. 30cm bouldery silty clay loam. on lava blocks
Minimum effective rooting depth <40cm
Soil pH (acidity) Slightly acid (pH = pH = 6.3)
Salinity Non saline
Soil fertility under natural conditions Moderate to high fertility. Base saturation 75-100%. High organic calcium (C) values.
Soil moisture regime With weak to strong dry season (Udic moisture regime)
Susceptibility to drought Weak dry season (1-2 months <100mm rainfall). Rainfall 2750-3250mm.
Soil drainage Well drained
Susceptibility to waterlogging Never waterlogs
Susceptibility to flooding Never floods

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