The unsaturated zone above the water table is also known as the _____. (2) Places : These soils are found in the entire northern plains, Rajasthan, Gujarat (a narrow corridor), eastern coastal plains particularly in the deltas of the Mahanadi, the Godavari, the Krishna and the Kaveri rivers. (a) Black sol (b) Laterite soil (c) Alluvial soil (d) Red soil Ans : (c) Alluvial soil 20. These soils are of two types – old alluvial soil known as bangar and new alluvial soil known as khadar. True. ... Porosity is a measure of the volume of open space in rocks and unconsolidated geological materials such as alluvium and soils. Alluvium (from the Latin alluvius, from alluere, "to wash against") is loose, unconsolidated (not cemented together into a solid rock) soil or sediment that has been eroded, reshaped by water in some form, and redeposited in a non-marine setting. The black soils are generally clayey, deep and impermeable. In Gangetic plains, these soils are known as riverine alluvium. They spread over an area of 15 lakh km 2 or 40% of the total area of India. (a) Black soil (b) Red soil (c) Alluvial soil (d) Laterite soil Ans : (a) black soil 21. AEROBIC: Soils in which free oxygen is abundant and chemically oxidising processes prevail. The coastal belts are the areas of alluvium. They swell and become sticky when wet and shrink when dried. This usually occurs in well drained soils with good structure. The alluvial soil is formed by the deposition of the sediments brought by the rivers staring form the mountains (its origin). The lower horizons of the arid soil is occupied by kankar due … Alluvial soil is also known as riverine soil because they are found in river basins and are formed when streams and rivers slow their velocity. These soils are also known as the ‘Regur Soil’ or the ‘Black Cotton Soil’. This soil is of volcanic origin. Alluvial soil is also known as riverine soil because it is mainly found in the river basin.Alluvial soils are very fertile.They contains potash,phosphoric acid and lime which are ideal for the growth of sugarcane,paddy,wheat and other cereal and pulse crops.Soils in the drier areas are more alkaline . This soil gets deposited on the river banks when the river overflows on it. Black soil is rich in chemical properties and very suitable for the growth of cotton, jowar, wheat, linseed, ground nut and gram. Which soil is also known as regur soil? It is also found in the cracks and holes, resulting from the activities of … The deltaic alluvium on the eastern coast has also been deposited by river-channels. They are derived from the sediments deposited by the Indo-Gangetic rivers. Question 4: Alluvial Soils are also called ‘Riverine Soils’. (ii) Black Soil-This soil covers the greater part of Maharashtra, Gujarat, the whole of Andhra Pradesh and the Western part of Madhya Pradesh. Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel. Alluvial soils are of the greatest interest for fish culture. Much of the city of New Orleans is below sea level, yet it was not an … Alluvial soils are widespread in the plains of northern India and the river valleys. ALLUVIUM: Alluvium is the sediment deposited from transportation by channelled stream flow or over-bank stream flow. Answer: The chief region of Alluvial Soils in India is the Indo-Gangetic plain, where Alluvial Soils have been deposited mostly by rivers. It is also known as Deccan Trap Soil … Alluvial soils. ALLUVIAL: Alluvial refers to sediment deposition in riverine landscapes. Alluvial soils, the depositional soils transported by rivers, ... the black soil is very deep. Soils also contain a proportion of air in the free pore spaces between soil particles and clumps or aggregates. They are found ... Air in soil . Why? 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