soil map units where 179H Nairai is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Lau, Vanua Levu, Lomai Viti |
| Landscape position | Hill country in the lowlands and foothills |
| Soil parent material | basic and intermediate igneous rocks |
| Slope | Very steep (36-38°). Uneven microrelief due to erosion. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-12cm gritty clay loam. 12-30cm clay loam. 30-125cm clay. |
| Minimum effective rooting depth | >125 |
| Soil pH (acidity) | 0-12cm moderately acid. 12-125cm strongly acid. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Very low phosphorus (P) and potassium (K). Calcium (Ca), magnesium (Mg), Cation exchange capacity (CEC) and % base saturation values very low below 12cm. |
| Soil moisture regime | ustic |
| Susceptibility to drought | In normal years soil moisture deficits >100 days are experienced sometime in the period May to October. |
| Soil drainage | Well drained. |
| Susceptibility to waterlogging | Never waterlogs. |
| Susceptibility to flooding | Never floods. |
