Argyll

58, 58A - Argyll - Dominant Soil @ Map Scale 1:50000

Associated Soil/s	5, 6, 14  may also be found within these areas (58,  58a)  if a more detailed survey was carried out.
Soil Properties of Dominant Soil/s
Parent material	Hastings age alluvium from greywacke
Characteristics of site	Main channel and active flood plain of major rivers
Soil features	Gravel and stony soils with less than 30 cm of fine sand to loamy fine sand on top but with sand lenses at depth in gravels
Natural drainage Depth to gley and hence to water table after wet periods	Good >60 cm
Potential rooting depth, texture, and limiting layer	58 - <10 cm fine sand on stony gravels 58a – 10- 30 cm loamy fine sand on fine sand on stony gravels
Available water capacity (AWC) for the potential rooting depth	58 - 5-12 mm 58a - 12-25 mm
Infiltration rate	58 - very rapid 58a – rapid
Permeability rate	Stony gravels - very rapid Sand lenses   - moderate or rapid
Susceptibility to pugging and compaction when wet	Low
Susceptibility to wind erosion when dry	High
Unfavourable soil characteristics	58 - many gravels at surface Very low AWC Very rapid infiltration Very rapid permeability Sand topsoil susceptible to wind erosion

 

Soil Management of Dominant Soil/s

Artificial drainage	58, 58a - none required
Cultivate when moist to avoid wind erosion	58, 58a
Irrigation:- Recommended method Dripper spacing for continuous wetted strip Amount and frequency	58, 58a - sprinkler to prevent water loss If 4 l/hr drippers used 58 – 20 cm 58a – 30 cm For shallow rooting plants 58 - 2-6 mm 58a – 6-14 mm little and often to prevent water loss

 

Argyll (58, 58a) (photo K. Vincent)