Explanation:

rainfall and Vegetation

Mostly available soil in India (about 43%) which covers an area of 143 sq.km. Widespread in northern plains and river valleys.
In peninsular-India, they are mostly found in deltas and estuaries.Humus, lime and organic matters are present.Highly fertile.
Indus-Ganga-Brahmaputhra plain, Narmada-Tapi plain etc are examples.They are depositional soil – transported and deposited by rivers, streams etc.Sand content decreases from west to east of the country.New alluvium is termed as Khadar and old alluvium is termed as Bhangar.
Colour: Light Grey to Ash Grey.Texture: Sandy to silty loam or clay.