soil map units where 49B 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 | Undulating (4-7°). Smooth microrelief. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-26cm clay loam. 26-130cm clay. |
| Minimum effective rooting depth | <125cm |
| Soil pH (acidity) | 0-42cm near neutral. 42-130cm slightly 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 100-110 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 10 days within 1m of the soil surface. |
| Susceptibility to flooding | In normal years floods (water only) would occur 3-4 times a year with water running off within 24 hours. Floods depositing sediment have 1 in 15 year return period. Floods occur sometime within the period November to April. |
