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Citation: To use information from this web resource in your work, please cite this as follows:
Cranfield University 2018. The Soils Guide. Available: www.landis.org.uk. Cranfield University, UK. Last accessed 14/11/2018

9.63 LEACHED RST OPENCAST (lRO) (5027) Series

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Definition

Major soil group: 09 made ground soils Soils formed in a significant thickness of either artificial man-made material or former soil material or geological substrate that has undergone mechanical removal, transport and replacement.
Soil Group: 6 dense, seasonally wet made ground soils soils with an impermeable or slowly permeable subsoil that impedes the downward percolation of excess water causing significant seasonal wetness in their upper layers. They are wet within 40 cm depth for at least 30 days in most years and are recognized by one of the two following sets of characteristics. EITHER A layer that is at least 15 cm thick, starts within 80 cm depth and is slightly porous or very slightly porous with high packing density. If the layer starts at or below 60 cm, there must be contemporary evidence of wetness within 40 cm of the soil surface. If the layer starts within 40 cm depth, there must either be contemporary evidence of wetness in or above it, or the soil should be formed on a level or gently sloping site of less dian 3 degrees. OR A coherent, consolidated man-made substrate at some depth between 40 and 80 cm from the soil surface. If the substrate starts at or below 60 cm, there must be contemporary evidence of wetness within 40 cm of the surface. If the substrate starts within 60 cm, there must be contemporary evidence of wetness in some part of the overlying material. Dense, seasonally wet soils give rise to relatively fragile habitats that are wet and easily damaged by recreational use during the late autumn, winter and early spring, but can suffer drought stress during the summer months.
Soil Subgroup: 3 leached, base-rich dense, seasonally wet made ground soils Soils having a pH (in water, 1:2.5) of less than 6.5 to a depth of at least 10 cm AND, at some point within 80 cm depth, a layer that is at least 15 cm thick with a pH of 6.5 or more. IN ADDITION, if the pH is less than 5.5 to at least 10 cm depth, they lack any superficial F, H or humose Ah horizons that are 5 cm or more thick. Leached soils are somewhat depleted of bases (usually less than about 80% base saturated), at least in their upper parts, but are not yet sufficiently acid to significantly inhibit biological activity, leading to the development of acid-humose superficial layers. Soils which have, between the base of the contemporary topsoil and 80cm or a consolidated coherent man-made substrate, whichever is shallower, a layer that is at least 15 cm thick and comprises EITHER, calcareous material OR earthy material with at least 1% organic matter or a clay content more than 18%, OR base-rich rock waste or man-made material.
Soil Series: fine loamy replaced material

Brief Profile Description

In Soil Associations (with WRB classification of this series in each association)

0962    NEUTRAL RST OPENCAST Transportic Dytric Stagnic Regosols

Photos

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Surveyed profiles in LandIS

National Soil Inventory Sites: 0

Representative Profiles: 0

Auger Bores: 0

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All information Copyright, Cranfield University © 2018

Citation: To use information from this web resource in your work, please cite this as follows:
Cranfield University 2018. The Soils Guide. Available: www.landis.org.uk. Cranfield University, UK. Last accessed 14/11/2018