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All questions of Soils for OPSC OCS (Odisha) Exam
Assertion (A): Black soils are suitable for cotton cultivationReason (R): They are rich in humus.Select the correct answer from the codes given below :- a)Both (A) and (R) are true, and (R) is the correct explanation of (A).
- b)(A) is true, but (R) is false.
- c)(A) is false, but (R) is true.
- d)Both (A) and (R) are true, but (R) is not the correct explanation of (A).
Correct answer is option 'B'. Can you explain this answer?
Assertion (A): Black soils are suitable for cotton cultivation
Reason (R): They are rich in humus.
Select the correct answer from the codes given below :
a)
Both (A) and (R) are true, and (R) is the correct explanation of (A).
b)
(A) is true, but (R) is false.
c)
(A) is false, but (R) is true.
d)
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
 | Deepa Iyer answered |
Black soil rich in iron oxide, alumina but very low in humus, phosphates and nitrogen. Also named as regur and best soil for cotton cultivation.
In soil, water that, is readily available to plant roots is- a)gravitational water
- b)capillary water
- c)hygroscopic water
- d)bound water
Correct answer is option 'B'. Can you explain this answer?
In soil, water that, is readily available to plant roots is
a)
gravitational water
b)
capillary water
c)
hygroscopic water
d)
bound water
 | Maheshwar Kulkarni answered |
Answer : Capillary water
- b)capillary water
is retained on the soil particles by the nature of surface tensions. The gravity cannot remove the strong force from the soil particles. The molecules of capillary water are present in a liquid state. Plant roots are able to absorb it.
Consider the following statements regarding laterite soils of India :1. Laterite soils are generally red2. Laterite soils are rich in nitrogen And Potash3. Laterite soils are well developed in Rajasthan and up4. Tapioca and cashew nuts grow well in this soilWhich of the statements given above is/are correct?- a)1 only
- b)2, 3 and 4
- c)1 and 4 only
- d)1, 2 and 4
Correct answer is option 'C'. Can you explain this answer?
Consider the following statements regarding laterite soils of India :
1. Laterite soils are generally red
2. Laterite soils are rich in nitrogen And Potash
3. Laterite soils are well developed in Rajasthan and up
4. Tapioca and cashew nuts grow well in this soil
Which of the statements given above is/are correct?
a)
1 only
b)
2, 3 and 4
c)
1 and 4 only
d)
1, 2 and 4
 | Meera Singh answered |
- Laterite soil is characterized by the possession of iron oxides with red colour. Nitrogen, Phosphorus and potash are not present in proper quantities so it shows low fertile texture.
- Tapioca and cashew nuts are generally grown in such soil. This soil is found loss or more in states- Odisha, Maharashtra, Andhra, Tamil Nadu, Karnataka, Meghalaya and West Bengal.
The main aim of watershed management strategy of India is- a)promoting silviculture
- b)hillslope management
- c)arid land management
- d)soil conservation
Correct answer is option 'D'. Can you explain this answer?
The main aim of watershed management strategy of India is
a)
promoting silviculture
b)
hillslope management
c)
arid land management
d)
soil conservation
 | Suresh Reddy answered |
The main objectives of the watershed management strategy of India are to restore the ecological balance by harnessing, conserving and developing degraded natural resources such as soil, vegetative cover and water.
Which of the following statements about alluvial soils of India are correct?1. These are mostly clay soils and form deep cracks during the dry season.2. Usually they are very productive soils.3. These soils occur at high elevations as well as at low elevations.4. Many of these soils are deficient in nitrogen, humus and phosphorus.- a)1 and 2
- b)2 and 4
- c)1, 3 and 4
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements about alluvial soils of India are correct?
1. These are mostly clay soils and form deep cracks during the dry season.
2. Usually they are very productive soils.
3. These soils occur at high elevations as well as at low elevations.
4. Many of these soils are deficient in nitrogen, humus and phosphorus.
a)
1 and 2
b)
2 and 4
c)
1, 3 and 4
d)
1, 2 and 3
| | Kavita Mehta answered |
The alluvial soil is spread all over the plains of north India.
They are also found in the four delta regions of the south. Strips
Tea — Assam, West
Bengal, Tamil Nadu
Jute — West Bengal, Bihar,
Assam, Orissa
Rubber — Kerala, Tamil Nadu, Karnataka
Tobacco — Andhra Pradesh, Gujarat, Karnataka, Tamil Nadu
Farming - State
of alluvium occur along rivers in the plateau as well as in the mountains. Alluviums are mainly loamy, i.e. mixtures of sand and clay.
Red soil colour is caused by- a)aluminium compounds
- b)mercury compounds
- c)iron compound
- d)clay
Correct answer is option 'C'. Can you explain this answer?
Red soil colour is caused by
a)
aluminium compounds
b)
mercury compounds
c)
iron compound
d)
clay
 | Pooja Shah answered |
- Red soils develop in a warm, temperate, wet climate under deciduous forests and have thin organic and mineral layers overlying a yellowish-brown leached layer resting on a red layer made of iron oxide(ferric oxide).
- Red soils generally form from iron-rich sediments. They are usually poor growing soils, low in nutrients and humus and difficult to cultivate.
Leaching is the maximum in the soil type of- a)Laterite
- b)Red
- c)Regur
- d)Desert
Correct answer is option 'A'. Can you explain this answer?
Leaching is the maximum in the soil type of
a)
Laterite
b)
Red
c)
Regur
d)
Desert
 | Vikram Kapoor answered |
In agriculture, leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. The rate of leaching increases with the amount of rainfall, high temperatures, and the removal of protective vegetation. In areas of extensive leaching, many plant nutrients are lost, leaving quartz and hydroxides of iron, manganese, and aluminium. This remainder forms a distinctive type of soil, called laterite.
Mulching, an agronomic measure of soil conservation, is veryeffective because it :1. protects soil from gully erosion.2. protects soil from sheet wash and wind erosion.3. helps soil to retain moisture and nutrients.Select the correct answer using the code given below.- a)1 only
- b)1 and 2 only
- c)2 and 3 only
- d)1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Mulching, an agronomic measure of soil conservation, is very
effective because it :
1. protects soil from gully erosion.
2. protects soil from sheet wash and wind erosion.
3. helps soil to retain moisture and nutrients.
Select the correct answer using the code given below.
a)
1 only
b)
1 and 2 only
c)
2 and 3 only
d)
1, 2 and 3
| | Meera Singh answered |
Mulches are materials placed over the soil surface to maintain moisture and improve soil conditions. Mulching has proven to be an effective soil conservation practice, reducing both wind and water erosion during the winter period.
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