Soil

1. Is made of

1.1. Weathered Rocks

1.1.1. Sand

1.1.2. Silt

1.1.3. Clay

1.2. Organic Matter

1.2.1. Nutrients

1.2.1.1. Nitrogen

1.2.1.2. Potassium

1.2.1.3. Phosphorus

2. Descriptions

2.1. Texture

2.1.1. Silky

2.1.2. Sticky

2.2. Color

2.2.1. Chocolate/Yellow Brown

2.2.2. Grayish/Chocolate Brown

2.3. Consistance

2.3.1. Loose

2.3.2. Firm

3. Layers of Soil

3.1. Top

3.2. Subsoil

3.3. Parent Material

3.4. BedRock

4. Types

4.1. Desert

4.2. Forest

4.3. Grassland

4.4. Tropical Grassland