Write the formation of alluvial soil and black soil.Write any five features for each of them
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Answer:
What are the properties of alluvial soil ?
Alluvial soil is considered the most fertile soil. ...
Alluvial soil contains sand, silt and clay.
According to age, the alluvial soil is classified as Bangar (old alluvial) and Khadar (new alluvial).
Alluvial soil contains an ample amount of potash, phosphoric acid and lime.
The following are five important characteristics of Black soil:
It is fine textured and clayey in nature.
It has high amounts of lime, iron, magnesium and generally low quantities of phosphorus, nitrogen and organic matter.
It is black in colour since it is formed from weathered lava rocks.
The black soil is formed by the weathering of lava (igneous rocks) and cooling of lava after a volcanic eruption. The soil in the Deccan Plateau consist of black basalt soil, which is rich in humus, iron and also contain high quality of magnesia, lime and alumina.
Alluvial soils are formed mainly due to silt deposited by Indo-Gangetic-Brahmaputra rivers. In coastal regions some alluvial deposits are formed due to wave action. Rocks of the Himalayas form the parent material. Thus the parent material of these soils is of transported origin.