Soil

1. Description

1.1. brownish color

1.2. rocks

1.2.1. water

1.3. wood chips

2. Nutrients

2.1. P-Phosphorus

2.2. N-Nitrogen

2.3. K-Potassium

3. is made of

3.1. organic matter

3.1.1. made of

3.1.1.1. nutrients

4. weathered rocks

4.1. types of soil

4.2. sand

4.2.1. silt

4.3. clay

5. made up of

5.1. minerals

5.2. ~inorganic stubstance

6. made up of

6.1. bacteria

6.2. cells