1. Topsoil (A Horizon):
* Characteristics:
* Dark in color due to high organic matter content (humus) from decomposed plant and animal material.
* Rich in nutrients that support plant life.
* Often loose and crumbly, providing good aeration and water infiltration.
* Contains a variety of living organisms like earthworms, bacteria, and fungi.
2. Subsoil (B Horizon):
* Characteristics:
* Lighter in color than topsoil due to lower organic matter content.
* More compact and denser than topsoil, with less air and water infiltration.
* May have a clay-rich texture and contain minerals leached from the topsoil.
* Often has a reddish or yellowish color from iron oxides.
3. Parent Material (C Horizon):
* Characteristics:
* Composed of weathered bedrock or unconsolidated material that formed the soil.
* Shows little evidence of soil formation processes.
* May contain larger rock fragments and have a variable texture.
* Provides the foundation for the development of the other soil layers.
Note: These are the three main layers, but there can be other layers present in some soils, like an E horizon (eluvial horizon) in some acidic soils, and a transition layer between the A and B horizons. The specific characteristics of each horizon can vary depending on the climate, vegetation, parent material, and other factors.
