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Yogita Ingle 4 years, 9 months ago
Black soils are also known as the ‘Regur Soil’ or the ‘Black Cotton Soil’. It covers most of the Deccan Plateau which includes parts of Maharashtra, Madhya Pradesh, Gujarat, Andhra Pradesh and some parts of Tamil Nadu.
The black soil is formed by the weathering of igneous rocks and cooling of lava after a volcanic eruption.
Characteristics of black soils are:
• The black soils are generally clayey, deep and impermeable.
• They swell and become sticky when wet and shrink when dried.
• The black soils are rich in lime, iron, magnesia and alumina.
• They also contain potash.
• The colour of the soil ranges from deep black to grey.
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Yogita Ingle 4 years, 9 months ago
The cyclic movements of chemical elements of the biosphere between the living organisms and the environment are referred to as biogeochemical cycles.
Bio refers to living organisms and geo refers to rocks, soil, air and water on the earth.
Nitrogen is a major constituent of the atmosphere comprising of about 78% of the atmospheric gas.
Ninety per cent of fixed nitrogen is biological. The principal source of free nitrogen is the action of soil micro-organisms and associated plant roots on atmospheric nitrogen found in pore spaces of the soil. Nitrogen can also be fixed in the atmosphere by lightning and cosmic radiation. In the oceans, some marine animals can fix it. After atmospheric nitrogen has been fixed into an available form, green plants can assimilate it.
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The advantages are :
1. Improved Vantage Point,
2. Time freezing ability,
3. Broaded sensitivity,
4. Three dimentional perspective.
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Yogita Ingle 4 years, 9 months ago
Jet streams are winds that blow horizontally from west to east at a high speed near the tropopause and the stratosphere. These are high speed winds which influence the weather and climatic conditions of the region over which they blow.
There are two types of jet streams that blow at the tropical belt of 300 north latitudes- the westerly jet stream and the easterly jet stream.
A branch of westerly jet stream brings moderate to heavy rainfall followed by the cold waves to the Indian subcontinent.
The easterly jet stream also helps the Monsoon winds to blow into the greater part of India and brings monsoon showers.
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Bhavya Shree 4 years, 9 months ago
2Thank You