Soil

1. Is made of

1.1. Organic Matter

1.1.1. Organic matter is made up of dead animals and dead plants

1.2. Weathered Rocks

1.2.1. Sand

1.2.2. Silt

1.2.3. Clay

1.3. Nutrients

2. Layers

2.1. Top Soil

2.1.1. Top soil is the top layer of Earth Surface, it is mainly made of soil and organic matter

2.2. Sub Soil

2.2.1. The layer under the Top soil

2.3. Parent Material

2.3.1. The layer of soil deposites

2.4. Bedrock

2.4.1. Solid rock under the parent material layer

3. Descriptions

3.1. Color

3.1.1. Grayish

3.1.2. Brown

3.1.3. Red

3.1.4. Yellow

3.2. Consistence

3.2.1. Loose

3.2.2. Friable

3.2.3. Firm

3.3. Texture

3.3.1. Grainy

3.3.2. Silky

3.3.3. Sticky

4. Types

4.1. Desert Soils

4.2. Forest Soils

4.3. Grassland Soils

4.4. Tropical Grassland Soils