TNPSC Exam- Agriculture Officers Exam held on 2012-Part 4
76. A herbicide belonging to ‘Acetamide’ group
is
A)
Fenuron
B)
Butachlor
C)
Atrazine
D)
Nitrofen
Answer: B
77. A bio-agent used to control Salvinia molesta
is
A)
Hyacinth moth
B)
Flea beetle
C)
Curculioid weevil
D)
Scale insect
Answer: C
78. Loranthus is a
A)
Partial stem
parasite
B)
Total stem
parasite
C)
Complete root
parasite
D)
Complete leaf
parasite
Answer: A
79. Herbicide recommended for sugarcane crop is
A)
Atrazine
B)
Pendimethalin
C)
Butachlor
D)
Fluchloralin
Answer: A
80. An important pre-emergence herbicide used in
rice cultivation is
A)
Atrazin
B)
Butachlor
C)
Paraquat
D)
Propanil
Answer: B
81. A common herbicide used in sugarcane
cultivation is
A)
Atrazine
B)
Butachlor
C)
Fluchloralin
D)
Pendimethalin
Answer: A
82. Enriched FYM contains FYM & SSP in the ratio of
A)
5:2
B)
5:3
C)
5:1
D)
4:1
Answer: C
83. The major reason for global warming is the
emission of
i.
Carbon di oxide
ii.
Chlorofluro carbons
iii.
Hydrogen
iv.
Methane
A)
i, ii and iii of
the above
B)
i, ii and iv of
the above
C)
i, iii and iv of
the above
D)
i, ii, iii and iv
of the above
Answer: B
84. Which one of the
following factors is responsible for ‘guttation’ in the plants?
A)
Humidity
B)
Temperature
C)
Light
D)
Wind
Answer: A
85. Layer of the atmosphere which is subject to
changes in temperature is calle
A)
Troposphere
B)
Stratosphere
C)
Tropopause
D)
None of the above
Answer: A
86. Magnesium is constituent of
A)
Xanthophyll
B)
Anthocyanin
C)
Chlorophyll
D)
Cytokinin
Answer: C
87. Which one of the
following instruments is used to measure relative humidity?
A)
Anemometer
B)
Maximum
thermometer
C)
Minimum
thermometer
D)
Wet and dry bulb
thermometer
Answer: D
88. Acid soils are characterized by a pH of
A)
< 6
B)
7 to 8
C)
8 to 10
D)
> 10
Answer: A
89. Which of the following pairs is correctly
matched?
A)
Red Soil –
Calcareous
B)
Alkali Soil – pH9
C)
Black soil – rich
in Kaolinite
D)
Laterite Soil –
pH8
Answer: B
90. Average composition of humus includes
A)
Carbon
B)
Oxygen
C)
Nitrogen
D)
All the above
Answer: D
91. Arrangement of soil particles is known as
A)
Soil texture
B)
Soil structure
C)
Soil contour
D)
Soil order
Answer: B
92. Absorption of water by roots in saline soils
is affected by
A)
transpiration
B)
transportation
C)
osmotic effect
D)
shallow depth
Answer: C
93. Which one of the following is a CAM plant?
A)
Apple
B)
Brinjal
C)
Cowpea
D)
Pineapple
Answer: D
94. Electrical conductivity of Saline water
should be less than
A)
4.0 dSm-1
B)
5.0 dSm-1
C)
6.0 dSm-1
D)
7.0 dSm-1
Answer: A
95. Which type of soil is commonly known as
‘hungry and thirsty soil’?
A)
Black Soil
B)
Alluvial Soil
C)
Laterite Soil
D)
Red Soil
Answer: D
96. Organic matter is abundantly available in
A)
Sandy
B)
Clay loam
C)
Silt
D)
None of the above
Answer: B
97. A non expanding type of clay mineral is
A)
Chlorite
B)
Illite
C)
Kaolinite
D)
Montmorillionite
Answer: D
98. Reclamation of sodic soils can be achieved
by
i.
Applying gypsum
ii.
Green manuring
iii.
Leaching
iv.
Ponding
A)
i, ii and iii of
the above
B)
ii, iii and iv of
the above
C)
i, iii and iv of
the above
D)
i, ii, iii and iv
of the above
Answer: A
99. Carbon Sequestration is facilitated by
A)
Alley cropping
B)
Agro Forestry
C)
Monocropping
D)
Strip cropping
Answer: B
100. Which of the following is not a bio mass?
A)
Bagasse
B)
Grass
C)
Sand
D)
Wood
Answer: C
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