Q. Which of the following Soils is/are zonal Soil?
1. Desert Soils
2. Red Soils
3. Laterite Soils
Select the correct answer using the codes given below:

[A] 1 only

[B] 1 and 2 only

[C] 2 and 3 only

[D] 1, 2 and 3

Answer: D

The Soils can be classified on the basis of dominating factors: 

Zonal Soil – These soils occur in broad geographical areas or zones. 

  • They are influenced more by the climate and vegetation of the area rather than the rock-type. 
  • They are mature, as a result of stable conditions over a long period of time. 
  • For example – red soils, black soils, laterite soils, desert soils etc. 

Azonal Soil – It is that soil which has been developed by the process of deposition by the agents of erosion. 

  • It means that it has been made by the fine rocky particles transported from the far-off regions. 
  • These are immature soils and lack well-developed soil profiles.  
  • This may be due to the non-availability of sufficient time for them to develop fully or due to the location on very steep slopes which prohibits profile development. 
  • For Example – alluvial and loess soils. 

Source: G C Leong