77
At optimum level of output, the marginal return should be
1
positive
2
negative
3
equal to average return
4
zero
78
Which of the following is not a factor of production?
1
Land
2
Labour
3
Capital
4
Crop
79
Which one of the following is not a method of mass contact?
1
Circular letter
2
Television
3
Result demonstration
4
Leaflet
Answer: Result demonstration
80
Wilt pathogen is mainly
1
airborne
2
seed-borne
3
waterborne
4
soil-borne
81
Which of the following is organochlorine?
1
Malathion
2
Parathion
3
DDT
4
Aldicarb
82
Pedology is a study of
1
soil
2
water
3
rock
4
diseases
View Answer
84
Corn stunt disease is caused by
1
spiroplasma
2
phytoplasma
3
viroid
4
virusoid
View Answer
85
The length of a body tube of a compound microscope is
1
10 cm
2
16 cm
3
20 cm
4
25 cm
View Answer
86
Crystallization of virus was first done by
1
Adolf Mayer
2
M. W. Beijerinck
3
D. I. Ivanovsky
4
W. M. Stanley
View Answer
91
The recommended seed rate for direct-seeded upland rice for Assam is
1
25 kg/ha
2
50 kg/ha
3
75 kg/ha
4
100 kg/ha
View Answer
92
In which of the following groups of crops, the requirement of sulphur is more?
1
Sugar crop
2
Pulses
3
Forage crop
4
Oilseeds
View Answer
93
Who among the following is considered as the father of phytopathology in India?
1
M. K. Patel
2
S. P. Raychaudhuri
3
E. J. Butler
4
B. B. Mundkur
View Answer
94
The scientific journal, Phytopathology is regularly published from
1
India
2
Russia
3
China
4
USA
View Answer
95
The system of rice intensification (SRI) was developed in
1
China
2
Indonesia
3
Madagascar
4
Japan
View Answer
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