Question

what is aluvial soil
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Answer 1

Answer:

Alluvial Soil

Alluvial soil is found in the valleys of the Terai region and in the middle hill valleys around Kathmandu and Pokhara. The valleys lie between the Siwalik and Mahabharat hills which widen out in places to form flat fertile valleys called Dun valleys. New alluvial soil with more sand and silt than clay is being deposited in the flood plain areas along the river courses. Alluvial soil is also found in the higher areas above the flood plain covering a greater part of the Terai. The nutrient content of new alluvial soil is fair to medium depending on how long it has been cultivated. Conversely, the nutrient content of old alluvial soils is very low.

Answer 2

• They are developed by deposits of three main Himalayan river the Indus, the Ganga and the bhramaputra.
• They are claasified as old alluvial and new alluvial soil as Bangar & Khadar.
• It contain adequate amount of potash, phosphoric acid and lime.
• It is used to grow cereal and pulses, sugar cane, paddy and wheat.