Soil

1. types

1.1. Tropical grassland soil

1.2. desert soil

1.3. Grassland soil

1.4. Forest Soil

2. is made of

2.1. organic matter

2.2. Weather rocks

2.2.1. Sand

2.2.2. Silt

2.2.3. Clay

3. layers

3.1. TopSoil

3.2. SubSoil

3.3. Bedrock

4. Decriptions

4.1. Color

4.2. Textures

4.3. Consisdents