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Agriculture Optional Subject Solved Questions & Answers | GkSeries

77 At optimum level of output, the marginal return should be
1 positive
2 negative
3 equal to average return
4 zero

Answer:zero
78 Which of the following is not a factor of production?
1 Land
2 Labour
3 Capital
4 Crop

Answer: Crop
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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

Answer: soil-borne
81 Which of the following is organochlorine?
1 Malathion
2 Parathion
3 DDT
4 Aldicarb

Answer:Aldicarb
82 Pedology is a study of
1 soil
2 water
3 rock
4 diseases

Answer:soil
83 Tilt angle of disc furrow is
1 10°
2 20°
3 30°
4 40°

Answer:20°
84 Corn stunt disease is caused by
1 spiroplasma
2 phytoplasma
3 viroid
4 virusoid

Answer: spiroplasma
85 The length of a body tube of a compound microscope is
1 10 cm
2 16 cm
3 20 cm
4 25 cm

Answer: 16 cm
86 Crystallization of virus was first done by
1 Adolf Mayer
2 M. W. Beijerinck
3 D. I. Ivanovsky
4 W. M. Stanley

Answer:W. M. Stanley
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

Answer:75 kg/ha
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

Answer:Oilseeds
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

Answer:E. J. Butler
94 The scientific journal, Phytopathology is regularly published from
1 India
2 Russia
3 China
4 USA

Answer:USA
95 The system of rice intensification (SRI) was developed in
1 China
2 Indonesia
3 Madagascar
4 Japan

Answer:Madagascar

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