Question Discussion & Solution

The correct answer is Between Aravalli and Western Arid Zone.

• Coppen classification of Rajasthan climate:
  • Aw: Tropical humid climatic region (Southern Part)
  • BShw: Semi-dry tropical climatic region (Between Aravalli and Western Arid Zone)
  • Bwhw: Tropical dry climatic region (western parts of Thar Desert)
  • Cwg: Semi humid climatic region (south-eastern areas of Aravalli)
• BShw:
  • Semi-dry tropical climatic region   
  • This climatic region is semi-arid, where winters are dry and even in summers there is no sufficient amount of rainfall.
  • Vegetation is of steppe type, characterized by thorny bushes and grasses.
  • The region includes Barmer, Jalore, Jodhpur, Nagaur, Churu, Sikar, Jhunjhunu and Hanumangarh districts of the Rajasthan.

The correct answer is Red Loam Soil.

Key Points

• Red Loam Soil-
  • This soil is found in the southern part of Rajasthan.
  • This soil is found in Chittorgarh, Banswara, and Dungarpur districts.
  • This soil is deficient in Nitrogen, Calcium, and Phosphorous.
  • This soil is rich in Iron oxide, so this has red color.
  • This soil has the capacity for holding humidity for a long time.
  • This soil doesn't require much rain for farming.

​Additional Information

• Black Soil-
  • This soil is found mostly in the southeastern part of the Rajasthan.
  • This soil is deficient in lime, phosphoric acid, and humus.
  • This soil is rich in Potash and calcium.
  • Cotton is mostly grown in this soil.
  • It is also known as Regur soil. 
• Alluvial Soil-
  • This soil is found mostly in the eastern plains of Rajasthan.
  • It is found mostly in Jaipur, Alwar, Ajmer, Tonk, Kota, Sawai Madhopur, Dholpur, and Bharatpur districts.
  • It is deficient in lime, phosphorus, and humus.
  • This soil is rich in Nitrogen.
  • This soil is the most fertile soil.
• Desert Soil-
  • This soil is found in western Rajasthan in the districts of Jaisalmer, Barmer, Jodhpur, Churu, Sikar, Jhunjunu, Bikaner.
  • It is deficient in Nitrogen and Organic materials.
  • This soil is rich in Calcium.

The correct answer is Jhalawar.

Key Points

• Some important facts of rainfall in the Rajasthan-
  • Rajasthan's annual rainfall average is 57.51 cm.
  • Rajasthan receives the most rainfall through the Bay of Bengal's Monsoon.
  • Rajasthan receives the most rainfall in the month of July.
  • Ajmer receives rainfall similar to Rajasthan's annual average rainfall.
  • Jhalawar receives the most rainfall, while Jaisalmer receives the least rainfall.
  • Kota division receives the most rainfall while the Jodhpur division receives the least rainfall.
  • Jaisalmer has the most rainfall changes while Jhalawar has the least rainfall changes.
  • Rainfall in winter is known as Mawath in the Rajasthan

The correct answer is Behror, Bhimmal, Surajgarh, Dhond, Shri Madhopur.

Key Points

• Rajasthan can be divided into three hydrogeological units namely, unconsolidated sediments, semi-consolidated sediments and consolidated rocks.
• Central Ground Water Board (CGWB) under the Ministry of Water Resources and State Governments jointly estimated replenishable groundwater resources.
• Some of the parts of Rajasthan have been categorized as “Over exploited”. Over-exploited assessment units of Rajasthan are- Behror, Bansur, Kathumar, Kishangarh, Kotkasim, Laxmangarh, Mandawar, Neemrana, Rajgarh, Ramgarh, Reni, Thanagazi, Tijara, Umrain.
• Central Ground Water Authority of India has put a total ban on the exploitation of groundwater in Behror, Bhimmal, Surajgarh, Dhond, Shri Madhopur.
• Dudu, Sambhar, Chaksu, Jamwa Ramgarh and Kotputli blocks are affected by salinity problems. Further many areas in Jaipur have problems with fluoride contamination in groundwater.

Additional Information

• Central Ground Water Board (CGWB) is the apex organization of the Ministry of Water Resources dealing with groundwater and related issues.

The correct answer is Dungarpur - Banswara.

Key Points

• Mixed red and black soils are found in Dungarpur - Banswara.

Additional Information 

• Red Loamy Soil:
  • Southern Part of Rajasthan in Dungarpur, Banswara, Udaipur.
  • It lacks nitrogen and phosphorous and there is an excess of iron elements.
  • This soil has moisture-holding capacity.
  • By giving chemical fertilizer and irrigation in this type of soil rice, cotton, maize, wheat, sugarcane, etc. can be produced.
• Saline Soil:
  • South-Western Part of Rajasthan in Jalore Barmer.
  • This type of soil has a high amount of alkaline salts.
  • It is infertile, not suitable for cultivation.
  • Only shrubs grow in this soil.
• Sandy Soil:
  • Found in North-Western Part of Rajasthan in Bikaner, Jaisalmer, Jodhpur.
  • Soil particles are thick.
  • Less water holding capacity.
  • The soil lacks nitrogen and has calcium salts.