Ha2 Ha'atua soils, moderately sloping phase

soil map units where Ha2 Ha'atua soils, moderately sloping phase is dominant

Soil properties

Property Value
Geographic distribution 'Eua
Landscape position Easy rolling surfaces of ash-covered coral limestone terraces.
Soil parent material
Slope Gently to moderately rolling slopes (5-12°)
Surface outcrops
Brief soil profile description 0-36 cm Dark brown friable clay; 36-80 cm Dark reddish friable brown clay; clay coatings; many Fe-Mn mottles; 80-120 cm Dark reddish brown friable clay; on Coral limestone.
Soil profile texture
Minimum effective rooting depth 120 cm
Soil pH (acidity) Slightly acid
Salinity
Soil fertility under natural conditions Organic carbon (C) medium to very low with depth; nitrogen (N) and phosphorus (P) low; phosphorus (P) retention high; Base saturation (%), exchangeable calcium (Ca) and magnesium (Mg) high; sulphur (S) medium to very high; reserve potassium (K) low.
Soil moisture regime
Susceptibility to drought
Soil drainage Well drained
Susceptibility to waterlogging
Susceptibility to flooding

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