29 - Okawa
Soil Properties
| Parent material |
Water deposit (alluvium) from loess |
| Characteristic site and soil features |
Valley floor between ridges of Matapiro soil (28) with silt loam on clay loam on cemented pan |
| Associated soils not shown within map unit at map scale but separated out in more detailed maps. - Sample Location |
30, 32
A |
| Natural drainage and depth to gley and hence to water table after wet periods |
Poor
<30cm - from perching and high ground water |
| Potential rooting depth, texture, and limiting layer |
30-45cm silt loam on gleyed clay loam on cemented pan |
| Available water capacity |
30-50mm |
| Infiltration rate |
Moderate
|
| Permeability rate |
Very slow |
| Susceptibility of topsoil to pugging and compaction when wet |
Very high |
| Unfavourable soil characteristics |
Silty topsoil difficult to manage in wet conditions perched gley on very slowly permeable cemented pan |
Soil Management
| Artificial drainage: drain spacing |
29 10 - 20m |
| Cultivate when moist to avoid: compaction |
29 |
Irrigation:-
Recommended method
Dripper spacing for continuous wetted strip
Amount and frequency |
29 sprinkler to prevent waterlogging
29 60cm if 4 l/hr drippers used
little (15-25mm), often to prevent waterlogging |
Okawa silt loam (29) (photo E. Griffiths)