soil map units where 5 Apia silty clay is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Upolo |
| Landscape position | Soils of the coastlands, valley floors and their margins |
| Soil parent material | from estuarine sediment and organic residue |
| Slope | Flat land often hummocky |
| Surface outcrops | No stones, boulders or rock outcrops. |
| Brief soil profile description | - |
| Soil profile texture | 25cm clay. 20cm mottled clay. on mottled clay water table at 60cm |
| Minimum effective rooting depth | <50cm |
| Soil pH (acidity) | Moderately acid (pH = pH = 5.8) |
| Salinity | Non saline |
| Soil fertility under natural conditions | Moderate to high fertility. |
| Soil moisture regime | - |
| Susceptibility to drought | Weak dry season (1-2 months <100cm rainfall). Rainfall 3250-4500mm. |
| Soil drainage | Imperfectly drained |
| Susceptibility to waterlogging | Water table affected by tidal fluctuations. |
| Susceptibility to flooding | Period flooding during wet season |
