This is the most widely spread and important soil . In fact the entire Northern plain are made up of Alluvial soil . These have been deposited by three important Himalayan River system- the Indus , the Ganga , the Brahmaputra .These soils also extend in Rajasthan and Gujarat through a narrow corridor . Alluvial soil is also found in the eastern coastal plains particularly in the deltas of the Mahanadi , the Godavari , Krishna and the Kaveri rivers .
The Royale soil consists of various proportions of sand , silt and clay . Soils are also described on the basis of their age according to their age Alluvial soil can be classified as old alluvial (Bangar) and new Alluvial (Khadar) . The Bangar soil has higher concentration of Kankar nodules then the Khader . It has more fine particles and is more fertile than the Bangar .
Alluvial soils as a whole are very fertile , mostly these soil contain adequate proportion of Potash , phosphoric , acid and lime which are ideal for the growth of sugarcane , paddy , wheat and other cereal and pulses crops . Due to its high fertility , regions of Alluvial soils are intensively cultivated and densely populated . Soils in the dryer areas are more alkaline and can be productive after proper treatment and irrigation .
