RAS question
Alluvial soil in Rajasthan is mainly found in:
Correct answer: (D) Eastern Rajasthan (Bharatpur, Alwar, Dholpur, Sri Ganganagar).
Alluvial soil in Rajasthan is mainly found in the eastern and north-eastern plains, especially around Alwar, Bharatpur, Jaipur, Sawai Madhopur and central Sri Ganganagar.
Explanation
Alluvial soil is associated with Rajasthan's eastern and north-eastern plains rather than the Aravalli or desert tracts. The World Bank Group's Rajasthan State Highways Development Program II Environment Management Framework places alluvial soils in the north-eastern part of the state, specifically Alwar, Bharatpur, Jaipur and Sawai Madhopur, with another occurrence in the central part of Ganganagar district. The same distribution includes districts such as Bharatpur, Alwar, Dholpur, Sawai Madhopur and Sri Ganganagar. Because alluvial soil is deposited by rivers and is fertile for agriculture, the option pointing to eastern Rajasthan and these plain districts best captures the distribution being tested.
Why the other options are wrong
- (A) The central Aravalli region is not the main alluvial-soil belt; brown or forest soils are associated with it instead.
- (B) Southern Rajasthan is ruled out because that region is linked with red soil, not with the eastern and north-eastern alluvial plains.
- (C) Western Rajasthan mainly has desert or sandy soil, while alluvial soil is placed chiefly in the north-eastern districts and central Ganganagar.
Concept
This tests Rajasthan's soil-region mapping, a standard Geography of Rajasthan theme. It recurs in RAS because soil distribution connects physical geography with agriculture and regional planning.