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Humanities/Arts Exam  >  Humanities/Arts Questions  >  Which of the following soils contain a large ... Start Learning for Free
Which of the following soils contain a large proportion of sodium, potassium and magnesium?
  • a)
    Forest soil
  • b)
    Usara soil
  • c)
    Yellow soil
  • d)
    Laterite soil
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Which of the following soils contain a large proportion of sodium, pot...
Usara soil is also known as saline soil. It contains a large proportion of sodium, potassium and magnesium. It has salts largely because of the dry climate and poor drainage.
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Most Upvoted Answer
Which of the following soils contain a large proportion of sodium, pot...
Usara soil contains a large proportion of sodium, potassium, and magnesium.

What is Usara soil?
Usara soil is a type of soil commonly found in arid and semi-arid regions. It is characterized by its high salt content, alkalinity, and low organic matter. The name "Usara" is derived from the Arabic word for salty or saline. This type of soil is formed through the process of salinization, where the accumulation of salts in the soil exceeds the leaching capacity of water.

Composition of Usara soil:
Usara soil contains a large proportion of sodium, potassium, and magnesium. These elements are present in high concentrations due to the accumulation of salts in the soil. Other common elements found in Usara soil include calcium, chloride, and sulfate.

Factors contributing to the high content of sodium, potassium, and magnesium:
1. Salinization: Usara soil is formed through the process of salinization, which results in the accumulation of salts in the soil. These salts contain high levels of sodium, potassium, and magnesium.

2. Arid and semi-arid climate: Usara soil is commonly found in arid and semi-arid regions where the evaporation rate exceeds the precipitation rate. The limited rainfall and high temperatures lead to the concentration of salts in the soil.

Effects of high sodium, potassium, and magnesium content:
1. Alkalinity: The high content of sodium, potassium, and magnesium contributes to the alkalinity of Usara soil. This alkalinity affects the pH of the soil, making it less suitable for many plant species.

2. Poor fertility: Usara soil has low organic matter content and lacks essential nutrients for plant growth. The high salt content further inhibits the growth of crops and other vegetation.

3. Low water infiltration: The presence of salts in Usara soil reduces water infiltration and drainage. This can lead to waterlogging and further exacerbate the salinity issues.

Conclusion:
Usara soil is characterized by its high salt content, alkalinity, and low organic matter. It contains a large proportion of sodium, potassium, and magnesium, which are responsible for its salinity. Due to these characteristics, Usara soil is not suitable for most plant species and poses challenges for agriculture in arid and semi-arid regions.
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Which of the following soils contain a large proportion of sodium, pot...
Option B is correct
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Direction: Read the case study given below and answer any three of the questions that follow.Saline soils contain a larger proportion of sodium, potassium and magnesium, and thus, they are infertile, and do not support any vegetative growth. They have more salts, largely because of dry climate and poor drainage. They occur in arid and semi-arid regions, and in waterlogged and swampy areas. Their structure ranges from sandy to loamy. They lack in nitrogen and calcium. Saline soils are more widespread in western Gujarat, deltas of the eastern coast and in Sunderbans areas of West Bengal. In the Rann of Kachchh, the Southwest Monsoon brings salt particles and deposits there as a crust. Seawater intrusions in the deltas promote the occurrence of saline soils. In the areas of intensive cultivation with excessive use of irrigation, especially in areas of Green Revolution, the fertile alluvial soils are becoming saline. Excessive irrigation with dry climatic conditions promotes capillary action, which results in the deposition of salt on the top layer of the soil. In such areas, especially in Punjab and Haryana, farmers are advised to add gypsum to solve the problem of salinity in the soil.Q. Why do saline soils have more salts?

Direction: Read the case study given below and answer any three of the questions that follow.Saline soils contain a larger proportion of sodium, potassium and magnesium, and thus, they are infertile, and do not support any vegetative growth. They have more salts, largely because of dry climate and poor drainage. They occur in arid and semi-arid regions, and in waterlogged and swampy areas. Their structure ranges from sandy to loamy. They lack in nitrogen and calcium. Saline soils are more widespread in western Gujarat, deltas of the eastern coast and in Sunderbans areas of West Bengal. In the Rann of Kachchh, the Southwest Monsoon brings salt particles and deposits there as a crust. Seawater intrusions in the deltas promote the occurrence of saline soils. In the areas of intensive cultivation with excessive use of irrigation, especially in areas of Green Revolution, the fertile alluvial soils are becoming saline. Excessive irrigation with dry climatic conditions promotes capillary action, which results in the deposition of salt on the top layer of the soil. In such areas, especially in Punjab and Haryana, farmers are advised to add gypsum to solve the problem of salinity in the soil.Q. In Punjab and Haryana, farmers are advised to add _________to solve the problem of salinity in the soil.

Direction: Read the case study given below and answer any three of the questions that follow.Saline soils contain a larger proportion of sodium, potassium and magnesium, and thus, they are infertile, and do not support any vegetative growth. They have more salts, largely because of dry climate and poor drainage. They occur in arid and semi-arid regions, and in waterlogged and swampy areas. Their structure ranges from sandy to loamy. They lack in nitrogen and calcium. Saline soils are more widespread in western Gujarat, deltas of the eastern coast and in Sunderbans areas of West Bengal. In the Rann of Kachchh, the Southwest Monsoon brings salt particles and deposits there as a crust. Seawater intrusions in the deltas promote the occurrence of saline soils. In the areas of intensive cultivation with excessive use of irrigation, especially in areas of Green Revolution, the fertile alluvial soils are becoming saline. Excessive irrigation with dry climatic conditions promotes capillary action, which results in the deposition of salt on the top layer of the soil. In such areas, especially in Punjab and Haryana, farmers are advised to add gypsum to solve the problem of salinity in the soil.Q. Saline soils lack in

Direction: Read the case study given below and answer any three of the questions that follow.Saline soils contain a larger proportion of sodium, potassium and magnesium, and thus, they are infertile, and do not support any vegetative growth. They have more salts, largely because of dry climate and poor drainage. They occur in arid and semi-arid regions, and in waterlogged and swampy areas. Their structure ranges from sandy to loamy. They lack in nitrogen and calcium. Saline soils are more widespread in western Gujarat, deltas of the eastern coast and in Sunderbans areas of West Bengal. In the Rann of Kachchh, the Southwest Monsoon brings salt particles and deposits there as a crust. Seawater intrusions in the deltas promote the occurrence of saline soils. In the areas of intensive cultivation with excessive use of irrigation, especially in areas of Green Revolution, the fertile alluvial soils are becoming saline. Excessive irrigation with dry climatic conditions promotes capillary action, which results in the deposition of salt on the top layer of the soil. In such areas, especially in Punjab and Haryana, farmers are advised to add gypsum to solve the problem of salinity in the soil.Q. Where can the saline soils be found?

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Which of the following soils contain a large proportion of sodium, potassium and magnesium?a)Forest soilb)Usara soilc)Yellow soild)Laterite soilCorrect answer is option 'B'. Can you explain this answer?
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