Darleith
DERIVATION:
Basaltic lavas and various igneous rocks e.g. dolerites, agglomerates.
TYPES OF PARENT MATERIALS MAPPED:
- Glacial till
- Glacial drift
- Shallow drift onto shattered rock
- Shattered rock in situ
COLOUR:
Dark brown to brown or reddish brown in subsoil.
TEXTURE:
Sandy silt loam to sandy loam with loamy sand more common on drifts derived from dolerites and basic agglomerates. Till deposits are finer textured with clay loam textures throughout the soils profile. Moderately stony with subsoil, increasing stone content if shattered rock is present.
DOMINANT LAND USE:
Arable, grassland, rough grazing.
LANDFORMS:
Undulating lowlands with gentle slopes to steep hill and valley sides, non-to moderate rocky.
SOIL CHEMISTRY:
Percentage base saturation and cation exchange capacity are low to high in the topsoil, increasing with depth. Total phosphorus is medium to high.
Low cobalt levels but risk of high molybdenum in herbage of poor draining soils.
SOIL PHYSICAL PROPERTIES:
Potential rooting depth up to 90cm restricted onlyby underlying rock or weak induration. Moderate structural development within subsoil.
SERIES NAME | SOIL TYPE | DRAINAGE | PARENT MATERIAL |
---|---|---|---|
Airigh | Peaty gley | Poor and very poor | Colluvium, moraines and residual |
Amlaird | Noncalcareous gley | Poor | Drift and till |
Arle | Humus iron podzol | Free | Colluvium, moraines and residual |
Baidland | Peaty podzol | Free below iron pan | Drift, till, colluvium and moraine |
Caorach | Peaty ranker | Poor | Residual and organic |
Chinn | Subalpine podzol | Free | Drift |
Cringate | Humus iron podzol | Free | Drift and till |
Darleith | Brown forest soil | Free | Drift, till, colluvium and moraine |
Darlskel | Skeletal soil | Variable | Very shallow drift and residual |
Drinnan | Noncalcareous gley | Poor and Very Poor | Colluvium, moraines and residual |
Drumain | Brown forest soil | Free | Drift |
Dunlop | Brown forest soil with gleying and Noncalcareous gley | Imperfect | Drift and till |
Dunwan | Humic gley | Poor and Very Poor | Till |
Glenaros | Brown ranker | Free | Shallow drift |
Myres | Peaty gley (SW) | Poor and Very Poor | Drift and till |
Pokelly | Noncalcareous gley | Poor and Very Poor | Till |
Tomtain | Humus iron podzol | Free | Drift and till |
Treshnish | Brown forest soil with gleying | Imperfect | Colluvium, moraines and residual |
- * Occurs only as component in soil complexes
- ** Survey completed but map not published