Hi Hihifo soils

soil map units where Hi Hihifo soils is dominant

Soil properties

Property Value
Geographic distribution Niuatoputapu
Landscape position Colluvium (from ridge and upper terrace) occupying a belt concentric to Vaipoa and Tu’avao soils.
Soil parent material
Slope Undulating (4-7°) to easy rolling (8-11°).
Surface outcrops
Brief soil profile description 0-40 cm Very dark brown friable sandy clay loam; 40-75 cm Dark reddish brown friable clay loam with weathered lapilli; 75-90 cm Yellowish red sticky clay loam with weathered lapilli.
Soil profile texture
Minimum effective rooting depth 90 cm
Soil pH (acidity) Near neutral
Salinity
Soil fertility under natural conditions Organic carbon (C) and nitrogen (N) values low; sulphur (S) values medium; Base saturation (%) and calcium (Ca) very high; potassium (K)high and sodium (Na) medium.
Soil moisture regime
Susceptibility to drought
Soil drainage Well drained 
Susceptibility to waterlogging
Susceptibility to flooding

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