Explanation:

Punjab is one of the richest state in the India in terms of alluvial soil(loamy soil) , which covers more than 46% of its total land area.
Alluvial soil is one of the best soils, requiring the least water due to its high porosity. The consistency of alluvial soil ranges from drift sand and rich, loamy soil to silt clays.It has the highest productivity with respect to other soils. It is present mostly along rivers and is carried by its streams during weathering of rocks. The soil is generally covered by tall grasses and forests, as well as a number of crops, such as rice, wheat, sugarcane, tobacco, maize, cotton, soybean, jute, oilseeds, fruits, vegetables, etc.