SOIL

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Factors affecting the volume and the speed of a river

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Tess of the D'Urbervilles

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Diversity of Life Concept Map

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REASONS FOR UNEVEN DEVELOPMENT IN THE WORLD

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SOIL

Types of soils

Azonal soils

Azonal soils are poorly developed and occur along the recent alluvium, steep slopes or sand deposits.

Zonal soils

Zonal soils are characterised by the dominant influence of climate.

Desert Soils

Reddish Brown Soils

Chernozem/Prairie/Steppe

Laterite Soils

Brown Forest Soils

Podzols

Tundra Soils

Soil formation factors

6) time

5) topography

4) parent material

3) soil organisms

2) vegetation

1) climate

Soil Profile

R (bedrock)

C (parent material)

B (subsoil)

A (topsoil)

O (humus or organic)

Properties of Soil

Soil fertility

Soil Color

Soil Structure

Soil Texture

Soil forming processes

3) downward leaching of fine particles

2) incorporation of organic matter

1) physical and chemical weathering of parent materia