Fo3 Foa soils, mottled phase

soil map units where Fo3 Foa soils, mottled phase is dominant

Soil properties

Property Value
Geographic distribution Ha'apai
Landscape position Young ash around coastal fringe in centre of Foa and Ha'ano islands.
Soil parent material
Slope Flat to very gently undulating (0-3°)
Surface outcrops
Brief soil profile description 0-30 cm Dark reddish brown friable clay; 30-70 cm Dark reddish brown friable to firm clay with clay coatings.
Soil profile texture
Minimum effective rooting depth 90 cm
Soil pH (acidity) Slightly acid to moderately alkaline
Soil fertility under natural conditions Low organic carbon (C) and nitrogen (N); medium to low P; high to medium phosphorus (P) retention; very high Base saturation (%), exchangeable calcium (Ca), magnesium (Mg) and high sodium (Na) values; low reserve potassium (K) and high reserve magnesium (Mg).
Soil moisture regime
Susceptibility to drought
Soil drainage Imperfectly drained
Susceptibility to waterlogging
Susceptibility to flooding

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