Explanation:

Alluvial soils are depositional soils, transported and deposited by rivers and streams.
The alluvial soils vary in nature from sandy loam to clay. They are generally rich in potash but poor in phosphorous. The colour of the alluvial soils varies from the light grey to ash grey. Its shades depend on the depth of the deposition, the texture of the materials, and the time taken for attaining maturity. Alluvial soils are intensively cultivated.
Alluvial soils are widespread in the northern plains and the river valleys. In the Peninsular region, they are found in deltas of the east coast and in the river valleys