Soil

1. Consistence

2. Color of Soil

3. Is made of

3.1. Organic Matter

3.1.1. Nutrients

3.2. Weathered Rocks

3.2.1. Sand, Clay, Silt

4. Types

4.1. Desert Soils

4.2. Forest Soils

4.3. Grassland Soil

4.4. Tropical Grassland Soil

5. Texture

6. Layers of Soil

6.1. Top Soil

6.2. Sub Soil

6.3. Parent Material

6.4. Bedrock