Which of the following statements about alluvial soils (mainly found in Northern India) is/are correct?1. It has been deposited mainly by the peninsular river system.2. It cannot be found in drier states such as Rajasthan and Gujarat.3. Alluvial soil with fine particles is generally more fertile than with coarser particles.4. It is always alkaline in nature.

🛑Important Points:
-It is deposited mainly by the three important Himalayan river systems. 
-It can be found in Rajasthan and Gujarat, and eastern coastal plains as well. 
-Soils in the drier areas are more alkaline and can be productive after proper treatment and irrigation. For e.g. Brahmaputra alluvium is acidic in nature.
-Apart from the size of their grains or components, soils are also described on the basis of their age.
-According to their age alluvial soils can be classified as old alluvial (Bangar) and new alluvial (Khadar).The Bangar soil has a higher concentration of Kanker nodules than the Khadar.
-It has more fine particles and is more fertile than the Bangar.
-Alluvial soils as a whole are very fertile.