Correct Answer:
(A)
Clayey soil
Smaller the pore of the soil, more effective is the cell activity and bigger the pore of any soil, less effective will be its cell activity. In clay soil, the cell activity is most effective and it is least in sandy soil. The effectiveness of the cell activity in these four soils are as follows:
Clayey > silt soil > loamy soil > sandy soil
Ques:
32
Arrange in chronological order:
Patpara formation
Khetaurhi formation
Baghor formation
Sihawal formation
Code:
Correct Answer:
(B)
4, 1, 3, 2
Ques:
33
Conservation of soil is the process in which –
Correct Answer:
(D)
Soil is conserved from harm
In a broad sense, the meaning of soil conservation is not only controlling erosion, rather it aims at maintaining high-level fertility of the land. The improvement in land use is called soil conservation. Hence, correct answer is (d).
Ques:
34
The formal development of Terrarossa takes place in that part of land which consists of
Correct Answer:
(A)
Limestone
Terrarossa is a type of red clay soil produced by the weathering of limestone rocks.
Ques:
35
Soil leaching is a major problem –
Correct Answer:
(A)
In tropical rainforests
Tropical rain forest regions of the world are facing the soil leaching problem due to heavy rainfall throughout the year. Hence , the correct answer is option (a).
Ques:
36
Halophytes grow well in –
Correct Answer:
(D)
Saline soils
Halophytes grow well in saline soil. Cryophytes grow well in cold soil. Plants growing in strong rocks are called Lithophyte and xerophytes grow in tropical desert areas. Hydrophytes grow well in water-logged areas.
Ques:
37
Which of the following is concerned with soil?
Correct Answer:
(A)
Edaphic
Edaphic means an abiotic factor relating to the physical or chemical composition of the soil found in a particular area.
Ques:
38
Which of the following adds/add nitrogen to the soil?
Excretion of urea by animals
Burning of coal by man
Death of vegetation
Select the correct answer using the codes given below :
Correct Answer:
(C)
1 and 3 only
Excretion of urea by animals and dead vegetation are decomposed by decomposers. This process helps plants getting nutrients from them. In this way, the continuous process of nitrogen cycle goes on and the soil gets the required amount of nitrogen.
Ques:
39
Contour bunding is a method of soil conservation used in –
Correct Answer:
(D)
None of the above
Contour bunding method of soil conservation is used in mountain regions. Slowing the flow of water during rain it checks soil erosion. In this process, farming on mountain slopes is done by contour bunding. Contours facilitate easy flow of water thus reducing soil erosion.
Ques:
40
Match List-I and List-II and select the correct answer by using the codes given below:
List-I (Soils) List-II (Climate region)
Podzol (i) Temperate cold steppe
Chernozem (ii) Cold temperate
Spodosols (iii) Hot and humid
Laterite (iv) Humid cold temperate
Code:
A B C D
Correct Answer:
(A)
ii i iv iii
The correct match of list-I with list-II is as follows :
(Soils) (Climate region)
Podzol – Cold temperate
Chernozem – Temperate cold steppe
Spodosols – Humid cold temperate
Laterite – Hot and humid