Nu Neiafu soils

soil map units where Nu Neiafu soils is dominant

Soil properties

Property Value
Geographic distribution Vava’u
Landscape position Foot slopes, valley floors and depression on reworked ash mantling raised coral terraces.
Soil parent material
Slope Flat to gently undulating (0-5°)
Surface outcrops
Brief soil profile description 0-30 cm Dark brown friable clay loam; 30-73 cm Dark brown firm silty clay loam; on Brown firm silty clay loam; many clay coatings.
Soil profile texture
Minimum effective rooting depth 100 cm
Soil pH (acidity) Topsoil near neutral, slightly acid subsoil
Salinity
Soil fertility under natural conditions High Base saturation (%), exchangeable calcium (Ca), magnesium (Mg) and K; Organic carbon (C) and nitrogen (N) medium in topsoil and very low in subsoil; very low reserve potassium (K).
Soil moisture regime
Susceptibility to drought
Soil drainage Well drained
Susceptibility to waterlogging
Susceptibility to flooding

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