soil map units where 49A Vatuma is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Viti Levu |
| Landscape position | Secondary floodplains and depressions in the lowlands and foothills |
| Soil parent material | river alluvium from basic and intermediate rocks |
| Slope | Flat to gently undulating (0-3°). Smooth microrelief. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-25cm clay loam. 25-125cm clay. |
| Minimum effective rooting depth | <125cm. Note seasonal waterlogging. |
| Soil pH (acidity) | 0-38cm near neutral. 38-125cm moderately alkaline. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Very low potassium (K) throughout. Nitrogen (N) very low. |
| Soil moisture regime | ustic |
| Susceptibility to drought | In normal years soil moisture deficits of 90-100 days are experienced sometime in the period May to October. |
| Soil drainage | Imperfectly drained. |
| Susceptibility to waterlogging | In normal years waterlogging can occur for up to 40 days within 1m of the soil surface. |
| Susceptibility to flooding | In normal years floods (water only) would occur 3-4 times but of short durations (1-2 days). Floods depositing sediment have a 1 in 10 year return period. Floods occur sometime within the period November to April. |
