64 - Willowbrook - Dominant Soil @ Map Scale 1:50000
| Associated Soil/s |
59, 60 may also be found within this area (64) if a more detailed survey was carried out. |
| Soil Properties of Dominant Soil/s |
|
| Parent material |
Ruataniwha age alluvium from greywacke over loess alluvium |
| Characteristics of site |
Gently sloping intermediate terrace |
| Soil features |
Deep sandy loam over cemented pan |
Natural drainage
Depth to gley and hence to water table after wet periods |
Poor
<30 cm |
| Potential rooting depth, texture, and limiting layer |
30-45 cm sandy loam on gleyed sand on sandy loam/silt loam at <100 cm and cemented pan and stones at >100 cm |
| Available water capacity |
>130 mm |
| Infiltration rate |
Moderate
|
| Permeability rate |
Very slow at >100 cm |
| Susceptibility to pugging and compaction when wet |
Very high |
| Susceptibility to wind erosion when dry |
Low |
| Unfavourable soil characteristics |
Poor drainage
Topsoil easily compacted causing slow infiltration |
Soil Management of Dominant Soil/s
| Artificial drainage: drain spacing |
40 m |
|
Cultivate when moist to avoid compaction
|
64 |
Irrigation:-
Recommended method
Dripper spacing for continuous wetted strip
Amount and frequency |
Any
40 cm
>50 mm infrequently
if slow infiltration - 15-25 mm often to prevent waterlogging |
Willowbrook (64) (photo E. Griffiths)