Explain soil profil with help of labelledvdigram
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Answer:
The soil profile is one of the most important concepts in soil science. It is a key to understanding the processes that have taken in soil development and is the means of determining the types of soil that occur and is the basis for their classification. The soil profile is defined as a vertical section of the soil from the ground surface downwards to where the soil meets the underlying rock.
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If you visit a site, Where are has been dug for building a house or looking in a soil Peat , on a road side cut you will see various layers in the soil. These layers are called soil horizons . The arrangement of these Horizons in a soil is known as soil profile.
♦ SOIL HORIZONS :
Each soil Horizon is different from the other in texture , colour , chemical composition and depth.
★ O HORIZONS ------› It is that top organic layer of the soil mostly made up of leaf litter and humus this horizon is rich in humus.
★ A HORIZONS ------› This players are also called as top soil and is found below the O horizon. Seed germinate and plant grow in this dark coloured Layer. It is made up of humus ( decomposed organic matter ) mixed with mineral particles.
Sometimes , leaching of minerals and clay content takes place in the lower part of A horizon as water drips throw this region. This process of leaching is called evaluation .
★ B HORIZONS -------› It is also called the sub soil. This layer is Beneath The A horizon and about the C horizon. It contains clay and mineral deposits like Iron and Aluminium oxide. It receives them , from layers above it , when mineralised water drips from the top soil.
★ R HORIZONS --------› This consists of the unweathered rock layer , called the Bedrock. It exist beneath all the other layers.
