Soil layers
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The document describes the different layers of soil from top to bottom: topsoil contains humus, roots, insects, bacteria, fungi, water and air and supports plant growth. Below the topsoil is the subsoil, which has smaller rocks, less humus, water and air. The bottom layer is bedrock, composed of large rocks with little water and air.
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Soil layers
- 1. S O I L L AY E R S
- 4. SUBSOIL
- 5. SUBSOIL SMALL ROCKS CONTAINS LITTLE HUMUS LESS WATER AND AIR
- 6. BEDROCK
- 7. BEDROCK CONTAINS BIGGER ROCKS LITTLE WATER AND AIR
- 8. S O I L L AY E R S TOPSOIL BEDROCK SUBSOIL