Different levels of the soil. explain it with a diagram
Answers
Answer:
A soil profile is a vertical section of soil like the diagram above. It allows you to examine the structure of soil. A soil profile is divided into layers called horizons. The main soil horizons are A, B, C and D.
Most important for plant growth, the A and B horizons are the top two layers of the soil. The A horizon is where there is most soil life and is sometimes called topsoil. Depending on the soil, the A horizon can be further divided into A1, A2 or Ao (organic). The B horizon is where clays and materials washed down from the A horizon accumulate. This is sometimes called subsoil.
The C Horizon consists of weathering rock.
The D horizon is bedrock. This is rock which has weathered to produce the soil you see above it (unless the soil has been deposited from elsewhere eg floodplains contain soil that has been carried downstream in water and then deposited as the flood recedes).
Explanation:
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Answer:
Soil is made up of many layers. These layers are often called horizons. Depending on the type of soil there may be several layers. There are three main horizons (called A, B, and C) which are present in all soil.
•Organic - The organic layer (also called the humus layer) is a thick layer of plant remains such as leaves and twigs.
•Topsoil:- Topsoil is considered the "A" horizon. It is a fairly thin layer (5 to 10 inches thick) composed of organic matter and minerals. This layer is the primary layer where plants and organisms live.
•Subsoil:- Subsoil is considered the "B" horizon. This layer is made primarily of clay, iron, and organic matter which accumulated through a process called illuviation.
•Parent material:- The parent material layer is considered the "C" horizon. This layer is called the parent material because the upper layers developed from this layer. It is made up mostly of large rocks.
•Bedrock:- The bottom layer is several feet below the surface. The bedrock is made up of a large solid mass of rock
