30 - Waipukurau - Dominant Soil @ Map Scale 1:50000
| Associated Soil/s |
28, 32 may also be found within this area (30) if a more detailed survey was carried out. |
| Soil Properties of Dominant Soil/s |
|
| Parent material |
Tongariro ash on loess |
| Characteristics of site |
Flat or gently sloping high terrace |
| Soil features |
Thin (eroded) air fall volcanic ash over loess with cemented pan |
Natural drainage
Depth to perched gley |
Imperfect
Water perched at 30-60 cm on pan |
| Potential rooting depth, texture, and limiting layer |
>20 cm ash on gleyed sandy loam (loess)
on cemented pan at 40-50 cm |
| Available water capacity |
25-50 mm |
| Infiltration rate |
Moderate but slow if compacted |
| Permeability rate |
Very slow |
| Susceptibility to pugging and compaction when wet |
High |
| Susceptibility to wind erosion when dry |
High |
| Unfavourable soil characteristics |
Imperfect drainage, water perched on pan
Very slow permeability
Topsoil easily compacted causing slow infiltration
Topsoil easily eroded by wind |
Soil Management of Dominant Soil/s
| Artificial drainage |
Mole drains above pan |
|
Cultivate when moist to avoid:
Compaction
Wind erosion
|
30
30 |
Irrigation:-
Recommended method
Dripper spacing for continuous wetted strip
Amount and frequency |
Sprinkler to prevent water logging
30 cm if 4 l/hr drippers used
15-25 mm often to prevent waterlogging |
Waipukurau (30) (photo E. Griffiths)