RAS question
Black (Regur) soil in Rajasthan is primarily found in which region?
Correct answer: (B) Hadoti Plateau (Kota, Bundi, Jhalawar).
Black (Regur) soil in Rajasthan is primarily found in the Hadoti Plateau region, covering Kota, Bundi, Baran and Jhalawar.
Explanation
Black (Regur) soil is associated with south-eastern Rajasthan’s Hadoti Plateau rather than the sandy or loamy tracts elsewhere in the state. Doubling Farmers' Income by 2022: Strategy Document for Rajasthan places the relevant agro-climatic zone in Baran, Bundi, Jhalawar and Kota, and specifically identifies the black-soil region of the Hadoti plateau as fertile. In standard RAS mapping, black soil here is linked with basaltic parent material and supports crops such as cotton and soybean. Therefore, the primary region of black soil in Rajasthan is Hadoti Plateau, represented by Kota, Bundi and Jhalawar.
Why the other options are wrong
- (A) Shekhawati is not the main black-soil belt in Rajasthan; its soil association is loamy, so it does not match the Hadoti black-soil region.
- (C) Western Rajasthan is ruled out because it is associated with sandy soil, not the fertile black soil of the Hadoti Plateau.
- (D) Mewar is not the required region because it is associated with brown soil rather than black Regur soil.
Concept
RAS preparation often tests Rajasthan’s regional soil distribution, especially matching soil types with physiographic regions. Soils connect physical geography with crop patterns such as cotton and soybean.