SOIL

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Antinatalist Policy

Jay Chenにより

9B 88 Bianca

Bianca Contiにより

Background Information of The Kite Runner

Sun Choiにより

Drought

Joshua Whitaker-Lockwoodにより

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