Tag: soil : our life
Questions Related to soil : our life
The soil which is transported by force of gravity is known as
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Colluvial
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Eolian
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Alluvial
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Glacial soil
Colluvium is a type of parent material that moved down slope due to gravitational forces (in some cases water may play a role in initiation of the movement). Colluvium is heterogeneous, unsorted material of all particle sizes (from boulders to clay) with relatively little abrasion to round the particles. Consequently, colluvium consists of very sharp, angular rock fragments accumulated at the base of steep slopes.
Aeolian soil : A type of soil that is transported from one place to another by the wind.
Alluvium is loose, unconsolidated (not cemented together into a solid rock) soil or sediments, which has been eroded, reshaped by water in some form, and redeposited in a non-marine setting.
Glacial soil Unsorted, non-stratified glacial deposits consisting of clay, silt, sand, and boulders transported and deposited by glacial ice.
Soil carried by gravity is
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Alluvial
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Colluvial
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Elluvial
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Glacial
Colluvium is a type of parent material that moved down slope due to gravitational forces. Colluvium is heterogeneous, unsorted material of all particle sizes (from boulders to clay) with relatively little abrasion to round the particles.
Surahi and Matki are made from
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Sandy soil
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Loamy soil
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Black soil
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Silt
Black soil is used to make matkis and surrahis. This is because it provides proper support due to air spaces between their particles. It can also retain water for a long period of time. Along with this, it can withstand a large amount of climatic change also.
Soil rich in Fe and Al due to excessice leaching is
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Alluvial
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Laterite
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Loam
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Both A and B
Laterite is a soil layer, that is rich in iron oxide and derived from a wide variety of rocks weathering under strongly oxidizing and leaching conditions. It forms in tropical and subtropical regions, where the climate is humid. When the velocity of running water decreases the heaviest particles are deposited on a riverbed. The finest particles (gravel, silt, sand, and clay) are deposited at the mouth of the river, forming a delta made of alluvial soil.
Alluvial soils in India are
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Found in desert
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Least fertile
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Very rare
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Most extensive soils
Alluvial soils are most extensive soil. It is formed due to deposition of the rivers brought down from the upper course of the river. It is found on the combined plain land of the Indus and the Ganga-Brahmaputra rivers which includes Punjab, Haryana, U.P., Bihar and West Bengal. The deltaic alluvium is found in deltas of the Ganga-Brahmaputra, Godavari, Mahanadhi and Kaveri rivers. The coastal alluvium is found in coastal sides of Peninsular India - called riverine soils it is originally found in river basins.
The darkest layer of soil is
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Top soil
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Bed rock
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C - horizon
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Sub rock
Dead plants and animals are degraded in soil by decomposing bacteria and fungi. The material formed after this decomposition activity is called humus. Humus is very rich in nutrients and black in color. Hence topsoil is the darkest. Greater the amount of humus more is the soil productivity. Thus the correct answer is option A.
Deep black soils are considered highly productive because of their high proportion of
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Clay and Humus
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Sand and Zinc
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Gravel and Calcium
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Silt and Earthworm
Deep black soil has a high proportion of clay and humus and high retentivity of moisture and thus are very productive for cultivation of important crops like cotton, wheat, jowar, linseed, castor, sunflower, millets, rice and sugarcane.
Colour of black soil is due to
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Iron, Aluminium, Humus content
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Presence of zinc, Sulphur, Potassium content
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Litter content
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All of the above
Black soil is the fertile soil present in India. It is abundantly found in Haryana, Maharashtra and Uttar Pradesh. The black colour of the soil is due to the presence of iron, aluminium and humus. This type of soil is most suitable for the cultivation of grains, vegetables and cotton.
......... is a mixture of loamy and yellow soils.
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Red soil
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Black soil
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Alluvial soil
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None of the above
Red soil is a mixture of loamy and yellow soils. Its red colour is due to the presence of abundant iron oxide. About two-thirds of Tamil Nadu has Red soil.It is suitable for the cultivation of tobacco, vegetables and paddy. Black soil is the fertile soil present in India. It is abundantly found in Haryana, Maharashtra and Uttar Pradesh. The black colour of the soil is due to the presence of iron, aluminium and humus. This type of soil is most suitable for the cultivation of grains, vegetables and cotton
Alluvial soil is formed
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By the weathering of rocks
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By humus break down
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Mineral deposition
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Deposition of certain substances by rivers