1. Alluvial soils (Entisols)

• These are most important from agriculture point of view.
• Alluvial soils are formed mainly due to silt deposited by rivers.
• In coastal regions, some alluvial deposits are formed due to wave action.
• The parent material of these soils is of transported origin.
• The soil is porous because it has about equal proportions of sand and clay (loamy), but clayey soils are not uncommon.
• While they are generally low in Nitrogen, the proportion of Potash, Phosphoric Acid and alkalies are adequate.
• They are best suited to irrigation and respond well to canal and well/tube-well irrigation.