Na1 Nuku’alofa soils, sandy loam phase

soil map units where Na1 Nuku’alofa soils, sandy loam phase is dominant

Soil properties

Property Value
Geographic distribution ‘Eua, Tongatapu
Landscape position Beach ridge.
Soil parent material
Slope Flat to gently undulating (0-3°).
Surface outcrops
Brief soil profile description 0-17 cm Black coarse sand; 17-50 cm Yellowish brown coarse sand; on Coral limestone.
Soil profile texture
Minimum effective rooting depth 50 cm
Soil pH (acidity) Moderately alkaline
Salinity
Soil fertility under natural conditions High in organic carbon (C) and nitrogen (N) in A horizons; phosphorus (P) high to very high.
Soil moisture regime
Susceptibility to drought Dries out in dry periods.
Soil drainage Excessively drained
Susceptibility to waterlogging
Susceptibility to flooding

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