CORE Key Points at a Glance

  1. 1

    Rajasthan soils are grouped by NBSS&LUP into Entisols, Inceptisols, Aridisols, Vertisols and Alfisols, with Entisols forming the largest share.

  2. 2

    Western sandy arid soils dominate districts such as Jaisalmer, Bikaner, Barmer, Churu, Jodhpur and Nagaur and are low in organic matter and moisture.

  3. 3

    CAZRI at Jodhpur is linked with arid soil-water management, dune stabilisation, shelterbelts, rangelands and desertification control.

  4. 4

    Eastern alluvial soils of the Banas-Chambal side support crops such as wheat, mustard, gram, bajra and pockets of sugarcane.

  5. 5

    Hadoti black soils in Kota, Bundi, Baran and Jhalawar are clayey, moisture-retentive Vertisols suited to soybean, wheat, mustard, coriander and garlic.

  6. 6

    Southern red-loamy soils in Banswara, Dungarpur, Pratapgarh and nearby Aravalli areas derive their red colour from iron oxides in crystalline rocks.

  7. 7

    Saline-alkaline soils around Sambhar, Didwana, Pachpadra and the Luni tract result from aridity, evaporation, weak drainage and salt accumulation.

  8. 8

    Watershed treatment and Soil Health Cards connect Rajasthan soil conservation with runoff control, nutrient diagnosis and location-specific farm advice.

CORE Classification and area frame

A Rajasthan Forest Department manual citing NBSS&LUP says Rajasthan soils are classified into five orders: Entisols about 36 percent of total area, Inceptisols about 23 percent, Aridisols about 20 percent, Vertisols about 2 percent and Alfisols below 1 percent; older exam-use groups include desert/sandy soils, dunes and associated soils, brown soils, sierozems, red loams, hill soils, saline-sodic soils, and alluvial and black soils.

PREDICTED Predicted RAS Questions

Based on PYQ trends and 2026 syllabus analysis

1 MCQ Which soil belt best explains the dominant soil setting of Jaipur, Dausa and Alwar in eastern Rajasthan?
  1. A Deep western desert sand of Jaisalmer type
  2. B Yellow-brown submontane or alluvial-transition soils Correct answer
  3. C Black cotton soil of Kota-Baran type
  4. D Salt crust soil of Sambhar lake bed only

Explanation

Option B fits the eastern Aravalli-foothill and nearby alluvial setting of Jaipur, Dausa and Alwar. Option A belongs to the far-western desert core, option C belongs to Hadoti, and option D narrows the answer to a salt-lake bed.