So1 Sopu soils

soil map units where So1 Sopu soils is dominant

Soil properties

Property Value
Geographic distribution Tongatapu
Landscape position Low lying coastal and lagoonal swamps.
Soil parent material
Slope Flat
Surface outcrops
Brief soil profile description 0-40 cm Black peat; 40-50 cm Dark grey sand;on Coral limestone or beach rock.
Soil profile texture
Minimum effective rooting depth 50 cm
Soil pH (acidity) Strongly alkaline
Salinity Saline
Soil fertility under natural conditions High organic carbon (C) and total nitrogen (N). Topsoil phosphorus (P) values medium.
Soil moisture regime
Susceptibility to drought
Soil drainage Imperfectly to poorly drained
Susceptibility to waterlogging Poor drainage
Susceptibility to flooding Flooding by saline waters.

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