Soil doesn't hurt
Cody Gにより
1. layers
1.1. 1. Topsoil
1.1.1. 2. Subsoil
1.1.1.1. 3. Weathered rock fragments
1.1.1.1.1. 4. Bedrock
2. descriptions
2.1. color
2.1.1. texture
2.1.1.1. consistancy
3. nitrogen
3.1. potassium
3.2. phosphorus
4. types of soil
4.1. Desert
4.1.1. grassland
4.1.1.1. tropical grassland
4.1.1.1.1. forest
5. whats its made of
5.1. 1. Clay Soil
5.1.1. 2. Silty Soil
5.1.1.1. 3. Loamy Soil
5.1.1.1.1. 4. Sandy Soil
6. sand silt clay
6.1. largest to smallest
6.1.1. 1.Sand
6.1.1.1. 2. Silt
6.1.1.1.1. 3. Clay