Soil
نص القصة المصورة
- Horizon A Top soil
- Did you know that horizon A is made from humus and other accumulated materials? Humus makes this the best layer for plant growth!
- Horizon B Subsoil
- Horizon B is made up of clay, silt, and sand .This horizon is also enriched with other inorganic materials!
- Horizon C parent material
- This is the last layer before bed rock. Horizon C is made from large pieces of rock that have experienced a lack of weathering. This layer is also made up of partial breakdown of inorganic materials.
تم إنشاء أكثر من 30 مليون من القصص المصورة