soil map units where 6a Namoa peaty silt loam is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Samoa |
| Landscape position | Soils of the coastlands, valley floors and their margins |
| Soil parent material | from estuarine sediment and organic residue |
| Slope | Flat and swampy |
| Surface outcrops | Surface free from stones and boulders. No rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 10cm peaty sandy clay loam. 15cm shelly loamy sand. 20cm peaty silt loam. on shelly loamy coarse sand |
| Minimum effective rooting depth | <75cm |
| Soil pH (acidity) | Near neutral (pH = pH = 6.7) |
| Salinity | Non saline |
| Soil fertility under natural conditions | High fertility. Base saturation 90-100%. Exchangeable potassium (K) and magnesium (Mg) very high. Available phosphorus (P) low |
| Soil moisture regime | - |
| Susceptibility to drought | Usually <1 dry month. Rainfall 2750-3250mm. |
| Soil drainage | Moderately well drained |
| Susceptibility to waterlogging | High water table. 1.5m above sea level. |
| Susceptibility to flooding | Floods during very high tides associated with sea surges |
