FhR Fahefa soils

soil map units where FhR Fahefa soils is dominant

Soil properties

Property Value
Geographic distribution Tongatapu
Landscape position Uplifted and ash-mantled coral surface.
Soil parent material
Slope Gently undulating.
Surface outcrops
Brief soil profile description 0-40 cm Very dark grey to dark reddish brown friable clay to clay loam;40-150 cm Dark reddish brown; firm clay; soft weathered lapilli often in bands;150-200 cm brown firm clay;on Coral limestone.
Soil profile texture
Minimum effective rooting depth 200 cm
Soil pH (acidity) Near neutral to moderately alkaline
Soil fertility under natural conditions Very high Base saturation (%), exchangeable calcium (Ca) and magnesium (Mg); exchangeable potassium (K) very high with low values at depth; organic carbon (C) and total nitrogen (N) medium in surface horizons falling to low at depth. phosphorus (P) high to very high.
Soil moisture regime
Susceptibility to drought Dries out for short periods during dry seasons.
Soil drainage Well drained
Susceptibility to waterlogging Moderate to rapid permeability and drains readily after periods of heavy rain.
Susceptibility to flooding

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