The three main characteristics of alluvial soil are as follows:
Alluvial soil is composed of various proportions of sandy silt and clay. Soil particles appear slightly larger as you move inland towards the valley of the river.
Upstream of the river valley. That is, the soil is coarse near the location of the slope failure. Such soils are more common in the Piedmont plains such as Deur, Chos and Terai.
Alluvial soil is very fertile.
Final Answer: Alluvial soil is very fertile ,alluvial soil is sandy to clay.these types of soil are very common in planes