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Geoecology: Soils - Coggle Diagram
Geoecology: Soils
Soil characteristics
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Colour
Dark brown soils: fertile, warm, high humus content, e.g. brown earths
Grey soils: infertile, leaching, poorly drained, waterlogging, e.g. podzols
Red soils: presence of iron oxide, rapid rates of chemical weathering, e.g. tropical red soils
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Organic content
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Humus is mixed into the soil by living organisms, e.g. earthworms
Sticky substance that helps to bind soil particles together and hold water, e.g. brown earths
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General composition
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Organic matter: living material, e.g. humus, living organisms
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