Question

how are alluvial plains formed​

Answer 1

Alluvial soil is the main and important soil that spreads across the river plains. They are formed by deposition of materials or sediments (alluvium) brought in down by rivers that consist of silt, sand, clay, etc.

Answer 2

Answer:

In India the alluvial soil is mainly in northern plain , it is formed by the help of three main river in india in northern. plain -----Ganga , Brahmaputra,and Indus .These river Deposits alluvial soil in northern plain