Q. Which of the following soil is also called as “regur soil”?

[A] Alluvial soil

[B] Saline soil

[C] Red soil

[D] Black soil

Answer: D
Notes:

Black cotton soil which is also called as Regur soil is derivative of trapped lava.  

  • These soils are rich in calcium carbonate, magnesium carbonate, potash and lime.  
  • Regur soil has high water retention capacity.  
  • It cracks in summer and hence oxygen reaches to the deeper layers of soil. 
  • Cotton is well grown in this soil and hence is also called as black cotton soil. 

Source: NCERT XI – India Physical Environment