| A | B |
|---|
| Regolith | Rock and mineral fragments |
| Humus | Decayed organisms |
| Loam soil | Good for growing plants |
| Climate | Has the most influence on soil formation |
| "A" Horizon | Topsoil |
| "B" Horizon | Hardpan |
| "C" Horizon | Partially weathered parent paterial |
| Bedrock | Unweathered parent material |
| Pedalfers | soil type predominately found in the eastern U.S. Contains large amount of iron oxide. Red-brown color. |
| Pedocals | Soil type found in drier climates Contains abudant calcite. Light gray-brown. |
| Laterite | Soil type found in wet tropical areas. Orange or red color. |
