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Soil 作者: Mind Map: Soil

1. Weathered Rocks

1.1. Sand

1.1.1. Silt

1.1.1.1. Clay

1.1.1.1.1. Rocks

2. Descriptions

2.1. Good soil has nitrogen, phosphorus, and potassium.

2.2. Bad soil would not of a lot of nitrogen, phosphorus, and potassium.

3. Texture

3.1. Good soil would be soft and woody

3.2. Bad soil would be hard and sandy

4. Is made of

4.1. Clay, Sand, and Silt

5. Organic Matter

5.1. Nitrogen

5.2. Phospherus

5.2.1. Potassium

6. types

6.1. Desert Soil

6.2. Grassland Soil

6.3. Forest Soil

6.4. Tropical Soil

7. Layers

7.1. Topsoil

7.2. Subsoil

7.3. Parent Material

7.4. Bedrock

8. Color

8.1. Good soil would be dark brown

8.2. Bad soil would be light gray