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11
Which of the following district of Tamil Nadu is not suitable for farming due to rising salinity in soil?
Discuss
Answer & Solution
Answer: Option A
Solution:
It has been observed that in Tiruchirapalli which is located along the Kaveri river the salinity levels are increasing the soil making it unfit for agriculture.
12
In India the problem of utilisation of agricultural wastes is in
Discuss
Answer & Solution
Answer: Option A
Solution:
In India the problem of utilisation of agricultural wastes is in conversion of cellulose into sugar.
13
The soil of northern plain of India is formed by
Discuss
Answer & Solution
Answer: Option B
Solution:
Soil of northem plains is alluvial soil which is the result of deposition of sediments by the process of aggradation. These soil cover almost 40% of the area of India.
14
Soil of Western Rajasthan have a high content of
Discuss
Answer & Solution
Answer: Option B
Solution:
Soil of western Rajasthan have a high content of Calcium. These soils have rich content of iron- oxide and devoid of calcium salts because calcium salts soluble in water and are easily washed away.
15
Black cotton soil of the Deccan region of India is associated with ________ rocks.
Discuss
Answer & Solution
Answer: Option A
Solution:
Black cotton soil of the Deccan region of India is associated with volcanic rocks. Deccan relates more specifically to that area of rich volcanic soils and lava-covered plateaus in the northern part of the peninsula between the Narmada and Krishna rivers.
16
Which of the following is/are not the characteristics of red soils?
I. They are derived from weathering of old crystalline and metamorphic rocks
II. They contain iron oxides
III. They have high water retention capacity
IV. They have high nitrogen content
Discuss
Answer & Solution
Answer: Option D
Solution:
The following that are not the characteristics of red soils are they have high water retention capacity and they have high nitrogen content.
17
Which of the following soils is formed under typical monsoonal conditions?
Discuss
Answer & Solution
Answer: Option C
Solution:
Laterite Soils is formed under typical monsoonal conditions. The alternation of wet and dry seasons leads to the leaching away of the siliceous matter of the rocks and the formation of laterite soils. The soils on the higher areas are generally more acidic than on the low lying areas.
18
Which of the following types of soils have a marked capacity to retain water?
Discuss
Answer & Solution
Answer: Option D
Solution:
Regur soil have a marked capacity to retain water. Black soil is also called Regur soil. It is black in color and ideal for growing cotton. This type of soil is typical of the Deccan trap (Basalt) region spread over North-West Deccan plateau and is made up of lava flows.
19
Which of the following statements regarding red soils of India is/are correct?
1. The colour of the soil is-red due to ferric oxide content.
2. Red soils are rich in lime, humous and potash.
3. They are porous and have friable structure.
Discuss
Answer & Solution
Answer: Option B
Solution:
The following statements that are correct regarding red soils of India are: The colour of the soil is-red due to ferric oxide content and they are porous and have friable structure.
20
Which of the following can be used to correct acidic soil?
Discuss
Answer & Solution
Answer: Option B
Solution:
Lime can be used to correct acidic soil. It increases the pH of acidic soil (the lower the pH the more acidic the soil); in other words, soil acidity is reduced and alkalinity increased. it provides a source of calcium and magnesium for plants. it permits improved water penetration for acidic soils.