Explain different layers of soil?
Answers
Answer:
Soil has different layers, which are called horizons. These layers begin with leaf litter, and end with the bed rock. The layers are:
[i] Leaf litter- This layer is the topmost layer and consists of leaf litter and decomposed organic matter. Above this layer are the plants' shoots.
[ii] Topsoil- This layer is slightly dark in color. It is made up of humus. Seeds germinate here.
[iii] Leaching layer- This layer is light in color. It is the third layer of soil. This layer is deprived of minerals because of the process of eluviation.
[iv] Subsoil- This layer contains mineral deposits. It gets its minerals from drips from the layer above (through process of eluviation).
[v] Regolith- This is the second last layer of soil. This has broken-up rocks from the bed rock. Plant roots and organic material are nil here.
[vi] Bed rock- The last comes the bed rock. This is made up of unweathered rocks and is below all the other layers.
Answer:
Explanation:
FOUR LAYERS OF SOIL
Soil
Soil is made up of distinct layers, called horizons. Each layer has its own characteristics that make it different from all of the other layers. These characteristics play a very important role in what the soil is used for and why it is important.
O HORIZON- This is the top layer of soil that is made up of living and decomposed materials like leaves, plants, and bugs. This layer is very thin and is usually pretty dark.
A HORIZON- This is the layer that we call "topsoil" and it is located just below the O Horizon. This layer is made up of minerals and decomposed organic matter and it is also very dark in color. This is the layer that many plants roots grow in.
B HORIZON- This is the layer that we call "subsoil" and it is located just below the A Horizon. This layer has clay and mineral deposits and less organic materials than the layers above it. This layer is also lighter in color than the layers above it.
C HORIZON- This is the layer that we call "regolith" and it is located just below the B Horizon. This layer is made up of slightly unbroken rock and only a little bit of organic material is found here. Plant roots are not found in this layer.
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