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Rocket clouds
Soil by Mind Map: Soil

1. Described using

1.1. texture

1.1.1. grainy

1.1.2. silky

1.1.3. sticky

1.2. consistence

1.2.1. loose

1.2.2. friable

1.2.2.1. firm

1.3. color

1.3.1. chocolate brown

1.3.1.1. yellow

2. is made of

2.1. organic matter

2.1.1. nutrients

2.2. weathered rocks

2.2.1. sand

2.2.2. silt

2.2.3. clay

3. types of soil

3.1. Tropical grassland

3.2. Forest

3.3. Grassland

3.4. desert

4. layers

4.1. top soil

4.1.1. has rock, sand, silt, clay, organic matter, air and water. About 20 cm deep and very rich in nutrients.

4.2. subsoil

4.2.1. not much organic matter, contains some chemicals found in topsoil

4.3. parent material

4.3.1. broken rock and very little organic matter

4.4. bedrock

4.4.1. hard rock

5. what soil needs

5.1. water

5.2. air

5.3. nutrients