Hf Ha'afeva soils

soil map units where Hf Ha'afeva soils is dominant

Soil properties

Property Value
Geographic distribution Ha'apai
Landscape position Young ash on raised terrace in centre of Ha'afeva Island.
Soil parent material
Slope Very gently undulating (3°)
Surface outcrops
Brief soil profile description 0-55 cm Dark reddish brown friable silt loam with small lapilli; 55-75 cm Dark reddish brown loose gravelly sandy loam with abundant lapilli.
Soil profile texture
Minimum effective rooting depth 75 cm
Soil pH (acidity) Slightly alkaline
Salinity
Soil fertility under natural conditions Topsoil organic carbon (C) and nitrogen (N) are low; phosphorus (P) low; Base saturation (%), exchangeable calcium (Ca) and magnesium (Mg) very high. Exchangeable potassium (K) and reserve potassium (K) low.
Soil moisture regime
Susceptibility to drought
Soil drainage Well drained
Susceptibility to waterlogging
Susceptibility to flooding

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