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MEDIUM
ENGLISH
Agriculture
Over-all mineral level of soil recedes due to:
A
Leaching only
Option A
B
Utilization by plants
Option B
C
Both (a) & (b)
Option C
D
Chemical reactions
Option D
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MEDIUM
ENGLISH
Agriculture
Bunds, dams and drains are constructed to prevent:
A
Stream bank erosion
Option A
B
Sheet erosion
Option B
C
Slip erosion
Option C
D
Gully erosion
Option D
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MEDIUM
ENGLISH
Agriculture
If the same crop is repeatedly grown in a field:
A
Nitrogen starvation many result
Option A
B
Specific mineral deficiency may arise
Option B
C
Soil will become prone to diseases
Option C
D
Water level in soil will recede
Option D
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MEDIUM
ENGLISH
Agriculture
If the top soil has been eroded, we retire a land and grow over it:
A
Lichens
Option A
B
Blue-green algae
Option B
C
Legumes
Option C
D
Grasses
Option D
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MEDIUM
ENGLISH
Agriculture
Erosion of very fine particles is seen on account of:
A
Saltation
Option A
B
Suspension
Option B
C
Surface creep
Option C
D
Shifting of dunes
Option D
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MEDIUM
ENGLISH
Agriculture
It occurs under normal conditions:
A
Geological erosion
Option A
B
Surface creep
Option B
C
Both (a) & (b)
Option C
D
Accelerated erosion
Option D
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MEDIUM
ENGLISH
Agriculture
The term riparian erosion is applied to:
A
Gully erosion
Option A
B
Slip erosion
Option B
C
Wind erosion
Option C
D
Stream bank erosion
Option D
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MEDIUM
ENGLISH
Agriculture
Soil erosion in plains consequent to rain fall is initiated by:
A
Rill erosion
Option A
B
Sheet erosion
Option B
C
Gully erosion
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Agriculture
To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:
A
Ley farming
Option A
B
Mulching
Option B
C
Basin listing
Option C
D
Strip cropping
Option D
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MEDIUM
ENGLISH
Agriculture
Grasses possess great regenerative power because they are:
A
Dominant species
Option A
B
Rhizomatous
Option B
C
Constantly grazed
Option C
D
fast growing
Option D
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MEDIUM
ENGLISH
Agriculture
The cutting of trees from the forests of hill near a catchment area:
A
Will have no effect on causing floods in plain
Option A
B
May cause flood in plains in rainy season
Option B
C
Will have no effect on climatic condition of that area
Option C
D
Will benefit the mankind for more area for cultivation
Option D
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MEDIUM
ENGLISH
Agriculture
The grazing animals can change the type of vegetation by:
A
Bringing in plant pathogens
Option A
B
Selective grazing
Option B
C
Cross pollination
Option C
D
Bringing the seeds of other plants
Option D
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MEDIUM
ENGLISH
Agriculture
Soil erosion can be prevented by:
A
Allowing herbivorous animals to graze excessively
Option A
B
Growing plants to form a soil cover
Option B
C
Making the land slopy
Option C
D
Increasing fertility
Option D
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MEDIUM
ENGLISH
Agriculture
When young plants are grazed too heavily they get killed because:
A
The roots are starved
Option A
B
Of the mechanical injury to roots
Option B
C
Most of the aerial parts are eaten away
Option C
D
All of the above
Option D
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MEDIUM
ENGLISH
Agriculture
Most important causative pollutant of soil may be:
A
Plastics
Option A
B
Iron junks
Option B
C
Detergents
Option C
D
Glass junks
Option D
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MEDIUM
ENGLISH
Agriculture
Which major aerosol pollutant is present in jet aircraft emission?
A
SO2
Option A
B
Fluoro-carbons
Option B
C
CCI4
Option C
D
CO
Option D
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MEDIUM
ENGLISH
Agriculture
The ultraviolet radiations from the sun cause reaction that produce:
A
Carbon monoxide
Option A
B
Sulphur dioxide
Option B
C
Ozone
Option C
D
Flourides
Option D
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MEDIUM
ENGLISH
Agriculture
Pollution can be controlled by:
A
Sewage treatment
Option A
B
Manufacturing electricity
Option B
C
By checking atomic blasts
Option C
D
All of the above
Option D
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MEDIUM
ENGLISH
Agriculture
The major cause of pollution is:
A
Man
Option A
B
Plants
Option B
C
Animals
Option C
D
Man and animals
Option D
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MEDIUM
ENGLISH
Agriculture
Most outstanding danger at present for the survival of living beings on earth is:
A
Radiation hazard
Option A
B
Desertification
Option B
C
Deforestation
Option C
D
Gleization
Option D
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