| Consider the following statements regarding Saline soils. |
| 1. Saline soils also known as Usara soils occur in arid and semi-arid region and in water logged and swampy areas. |
| 2. Their structure ranges from sandy to loamy. They lack in nitrogen and calcium |
| 3. In the areas of intensive cultivation with excessive use of irrigation, especially in areas of green revolution the fertile alluvial soils are becoming saline soils. |
| Which of the statements] given above is/are correct? |
A) Only 1
B) Only 2
C) 1 and 3
D) All of these
Correct Answer: D
Solution :
[d] Saline soils are also known as Usara soils. Saline soils contain a larger proportion of sodium, potassium and magnesium. They occur in arid and semi-arid regions and in water logged and swampy areas. Their structure ranges from sandy to loamy. In the areas of intensive cultivation with excessive use of irrigation, especially in areas of green revolution the dry climatic conditions promotes capillary action, which results in the deposition of salt on the top layer of the soil.
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