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MEDIUM
ENGLISH
Agriculture
Proximity of water level at low depths of soils results in development of:
A
No roots at all
Option A
B
Curved roots
Option B
C
Long roots
Option C
D
Shallow roots
Option D
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MEDIUM
ENGLISH
Agriculture
Commensalism is a relationship between two organism in which:
A
One is benefitted, other remains unaffected
Option A
B
One is benefitted, other remains unaffected
Option B
C
Both are benefitted
Option C
D
Both are unaffected
Option D
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MEDIUM
ENGLISH
Agriculture
Relationship between nitrogen fixing bacteria and a legume plant is described as:
A
Mutualistic
Option A
B
Parasitic
Option B
C
Saprophytic
Option C
D
Commensal
Option D
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MEDIUM
ENGLISH
Agriculture
The phenomenon of mimicry was first observed by:
A
Bates
Option A
B
Darwin
Option B
C
Lamark
Option C
D
Darlington
Option D
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MEDIUM
ENGLISH
Agriculture
The association of nodule bacteria with leguminous roots is known as:
A
Saprophytism
Option A
B
Symbiosis
Option B
C
Epiphytism
Option C
D
Parasitism
Option D
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MEDIUM
ENGLISH
Agriculture
Which one of the following factors is biotic?
A
Photoperiod
Option A
B
CO2 content to the soil
Option B
C
Texture and porosity of soil
Option C
D
Rainfall
Option D
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MEDIUM
ENGLISH
Agriculture
The zonels where no penetration of light occurs in a like:
A
Littoral zone
Option A
B
Limnetic zone
Option B
C
Both (a) & (b)
Option C
D
Profundal zone
Option D
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MEDIUM
ENGLISH
Agriculture
Mycorrhiza is a symbiotic association between:
A
Algae and fungi
Option A
B
Algae and bryophytes
Option B
C
Algae and roots of gymnosperms
Option C
D
Fungi and roots of higher plants
Option D
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MEDIUM
ENGLISH
Agriculture
Mark the correct relationship:
A
Holard – Chesard = Ecard
Option A
B
Chesard – Ecard = Holard
Option B
C
Holard + Ecard = Chesard
Option C
D
Ecard – Chesard = Holard
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following is a malacophyllous xerophyte?
A
Prosopis
Option A
B
Tephrosia
Option B
C
Nerium
Option C
D
Aloe
Option D
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MEDIUM
ENGLISH
Agriculture
The term ‘ecard’ refers to:
A
Available water
Option A
B
Unavailable water
Option B
C
Run off water
Option C
D
Total atmospheric precipitation
Option D
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MEDIUM
ENGLISH
Agriculture
The mesofauna of the soil is constituted by:
A
Rats and moles
Option A
B
Bacteria and fungi
Option B
C
Termites and nematodes
Option C
D
Algae and actinomycetes
Option D
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MEDIUM
ENGLISH
Agriculture
Amount the following water plants, heterophylly is found in:
A
Free floating
Option A
B
Rooted emergent
Option B
C
Submerged floating
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
The L- and H-layers are differentiated in:
A
Mull
Option A
B
Mor
Option B
C
Peat
Option C
D
Muck
Option D
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MEDIUM
ENGLISH
Agriculture
By chemical composition the humus has maximum percentage of:
A
Nitrogen
Option A
B
Oxygen
Option B
C
Carbon
Option C
D
Hydrogen
Option D
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MEDIUM
ENGLISH
Agriculture
The term ‘holard’ refers to:
A
Gravitational water
Option A
B
Capillary water
Option B
C
Water holding capacity
Option C
D
Field capacity
Option D
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MEDIUM
ENGLISH
Agriculture
The acidity of soil is primarily due to
A
H+
Option A
B
AI+3
Option B
C
Both (a) & (b)
Option C
D
H+ and Zn+2
Option D
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MEDIUM
ENGLISH
Agriculture
Melanization generally involves the following zone:
A
Horizon-B
Option A
B
Horizon-A
Option B
C
Horizon-C
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Agriculture
In coarse textured soils:
A
There is no soil air
Option A
B
Water retaining capacity is high
Option B
C
Pore space is narrow
Option C
D
Pore frequency is low
Option D
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MEDIUM
ENGLISH
Agriculture
The science dealing with study of soil is called:
A
Geology
Option A
B
Pedology
Option B
C
Both (a) & (b)
Option C
D
None of these
Option D
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