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CfE H Geography / Physical Geography: Biosphere - Revision
Transcript of CfE H Geography / Physical Geography: Biosphere - Revision
- Weather (climate)
- A0 – Vegetation, Humus, Biota
- A – Processes (Eluviation), Horizon definition, Materials in soil
- B – Process (Illuvaiton), Iron pan, colour
- C – Parent material, weathering
Explain the effects these process have on the soil profile
e.g Formation of an Iron pan can result in a layer of impermeable rock that could lead to water logging
CLIMATE - this should indicate an excess of precipitation over evaporation. This should indicate cool/cold conditions leading to a slow breakdown of plant litter
NATURAL VEGETATION / SOIL ORGANISM - coniferous forest & associated plant litter of needles could be featured. Limited soil biota and slow activity due to cool/cold climate. A mor/ acidic humus would tend to develop from the plant litter
RELIEF & DRAINAGE - downward movement of water leading to translocation of minerals and leaching, possible formation of an iron pan
PARENT MATERIAL - Dependant upon area – glacially derived parent material is typical of many areas with podzolic soils
CLIMATE – precipitation greater than evaporation during summer months, resulting in only moderate leaching. Warm summers
NATURAL VEGETATION / SOIL ORGANISM – mixed broad leaf, much plant litter though this is more easily broken down by more active soil biota. A moderate or moder type of humus would develop from the plant litter
RELIEF & DRAINAGE – downward movement of water, moderate leaching likely
PARENT MATERIAL – strong influence on soil development
CLIMATE - generally cool to cold
NATURAL VEGETATION / SOIL ORGANISM - very limited specialised species can survive under the conditions. Soil organisms that can survive in anaerobic conditions. Very slow break down of plant material
RELIEF & DRAINAGE – often flat areas poor drainage Poor drainage is the key soil- forming feature for this soil type
PARENT MATERIAL – generally impermeable in nature, often glacial drift and heavy clay deposited on the parent bedrock
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