MCQ
Soil MCQ - Practice Questions with Answers
Solve 137 Soil questions for RAS/RPSC preparation.
Practice questions
Q1The Soil Health Card scheme was launched by the Government of India in which year?
The Soil Health Card (SHC) scheme was launched on 19 February 2015 by PM Narendra Modi from Suratgarh, Rajasthan. It tests 12 parameters: N, P, K and S as macro-nutrients; Zn, Fe, Cu, Mn and B as micro-nutrients; plus pH, electrical conductivity and organic carbon. Cards are issued every 2 years.
Q2Consider the following statements: 1. In Rajasthan, alluvial soil of the eastern plains is associated with wheat and rice. 2. Sandy desert soil of western Rajasthan is mainly associated with soybean and cotton. 3. Black soil of the Hadaoti region is associated with soybean and cotton. Which of the statements given above are correct?
Statement 1 is correct because alluvial soil in the eastern plains, including Bharatpur, Alwar and Jaipur, is linked with wheat and rice. Statement 2 is incorrect because sandy or desert soil in western Rajasthan is associated with drought-tolerant bajra and jowar, not soybean and cotton. Statement 3 is correct because black soil in Hadaoti, including Kota, Bundi and Jhalawar, is linked with soybean and cotton.
Q3Saline/Alkaline soils in Rajasthan are concentrated around which of the following lake regions?
Saline and alkaline soils (locally called Usar, Kalar, or Reh) in Rajasthan are concentrated around the salt lake basins of Sambhar (Nagaur/Jaipur), Didwana (Nagaur), and Pachpadra (Barmer). These salt lakes evaporate seasonally, leaving sodium chloride and sodium sulphate deposits that raise soil salinity. Reclamation involves gypsum (calcium sulphate) application, which replaces sodium ions with calcium, improving soil structure.
Q4Saline (usar) soil in Rajasthan is predominantly found in:
Saline (usar/reh) soil in Rajasthan is found in and around the salt lake basins such as Sambhar, Didwana, Pachpadra, and Lunkaransar. High evaporation and poor drainage lead to salt accumulation in these areas.
Q5Consider the following statements about Rajasthan's soils: 1. Organic carbon in Rajasthan's soils generally increases from the western arid belt towards the eastern regions. 2. Western arid soils often have organic carbon below 0.5 percent due to sparse vegetation, high temperature and low rainfall. 3. Deep ploughing alone is sufficient for permanent reclamation of saline-alkali soils. 4. Zinc deficiency is the most widespread micronutrient deficiency in Rajasthan's agricultural soils. Which of the statements given above are correct?
Statement 1 is correct because the organic-carbon pattern is described as a clear west-to-east gradient. Statement 2 is correct because western arid soils often have organic carbon below 0.5 percent, linked to sparse vegetation, high temperatures and low rainfall. Statement 3 is incorrect because deep ploughing alone gives only temporary or incomplete improvement; gypsum, leaching, drainage and biological measures are needed for lasting reclamation. Statement 4 is correct because zinc deficiency is identified as the most widespread micronutrient deficiency in Rajasthan's soils.
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6Consider the following statements about soils and crops in Rajasthan: 1. Black cotton soil in the Hadoti region is linked with the Deccan Trap and is suitable for cotton and soybean. 2. Soybean cultivation is concentrated in Kota, Bundi, Jhalawar and Baran because of black soil. 3. Alluvial soil is mainly found in the western sandy desert and is deposited by wind action. 4. Vertisols are dark cracking clay soils with high shrink-swell character, found in south-eastern Rajasthan. Which of the statements given above are correct?
7Consider the following statements about Rajasthan's soils: 1. Sandy arid soil of the western Thar region is low in organic matter and nitrogen. 2. Alluvial soil is mainly found in the eastern plains and is considered the most fertile soil type in Rajasthan. 3. The Alwar-Bharatpur-Dholpur-Karauli belt is known mainly for sandy desert soil deposited by wind. Which of the statements given above are correct?
8Consider the following statements about soil types in Rajasthan: 1. Red soils occur mainly in Dungarpur, Banswara, Chittorgarh and Udaipur districts. 2. The red colour of these soils is due to diffused iron oxide or haematite. 3. One old Rajasthan soil classification groups soils into eight categories, including desert, dunes-associated, brown, sierozem, red loam, hill, saline-sodic, and alluvial or black soils. 4. Alluvial soils of Rajasthan are found mainly in western dunes and are described as the least fertile soils. Which of the statements given above are correct?
9Consider the following statements about black cotton soil in Rajasthan: 1. It has very high water retention. 2. It contains montmorillonite clay that swells when wet. 3. It is sandy in texture and therefore dries out very quickly. Which of the statements given above are correct?
10Consider the following statements about laterite soil in Rajasthan: 1. It is found in the southern tribal districts of Banswara, Dungarpur, Udaipur and Pratapgarh. 2. Its occurrence is linked with heavy rainfall and leaching. 3. It is mainly found in the western desert districts of Jaisalmer and Barmer due to wind deposition. Which of the statements given above are correct?
11Consider the following statements about selected soil groups in Rajasthan: 1. Red loam soils are common in Dungarpur, Banswara and parts of Udaipur and Chittorgarh. 2. Hill soils are common in the foothills of the Aravalli in districts such as Sirohi, Pali and Udaipur. 3. Saline-sodic soils are common in natural depressions such as Pachpadra and Sambhar. Which of the statements given above are correct?
12Which of the following statements about the impact of overgrazing on soils of western Rajasthan is/are CORRECT? 1. Overgrazing removes the sparse vegetation cover, accelerating wind erosion and desertification. 2. Loss of organic matter reduces soil water retention, making the soil more prone to drought stress. 3. Overgrazing increases soil compaction through trampling, reducing infiltration rates. 4. Overgrazing improves soil structure and infiltration rates in degraded rangelands.
13Consider the following statements about soil-crop associations in Rajasthan: 1. Black soil of the Hadoti belt is linked with soybean and cotton. 2. Alluvial soil of eastern plains is linked with wheat and rice. 3. Sandy or desert soil of western Rajasthan is linked with bajra and jowar. 4. Soybean cultivation is concentrated in Ganganagar and Hanumangarh because of black soil. Which of the statements given above are correct?
14With reference to organic carbon (OC) content in Rajasthan's soils, which of the following is CORRECT?
15Laterite soil in Rajasthan is found in which districts?