agriculture MCQs – Page 122

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

2421. The soil samples are dried at _______________, for gravimetric soil analysis?
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A. 110 <sup>0</sup>C

B. 120 <sup>0</sup>C

C. both A and B

D. 105 0C
2422. following are types of weathering:
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A. Geo chemical weathering

B. Judo weathering

C. Pedo chemical weathering

D. both a and c
2423. The body of an insect is covered by a protective __________________ formed from chitin and protein. Depending upon its precise composition and thickness, the cuticle may be soft and flexible or hard and rigid; according to requirements, it may or may not be permeable or waterproof:
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A. Six- layered skin (cuticle)

B. Two-layered skin (cuticle)

C. None of the above

D. three-layered skin (cuticle)
2424. Wind transported materials if it is silt dominated is__________?
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A. Eolian

B. Loess

C. Colluvial

D. Alluvial

2425. Exposure of the manures to rains causes highest loss of___________?
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A. Cl

B. P

C. N

D. Cu

2426. Some times, AB/EB/BA/BE horizons in soil profile are present which are called__________?
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A. Transition horizons

B. All of the above

C. Little horizons

D. Master horizons

2427. According to the Soil survey of Pakistan, the total waterlogged summer-rain area in the country is:_________?
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A. 5.16 mha

B. 4.11 mha

C. 22.5 mha

D. The above statement is wrong

2428. Nitrosomonas and nitrobacter are together as called_____________?
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A. Nitosomonas

B. Nitrobacteria

C. Ammonification

D. Nitrification

2429. The credit for identifying the essentality of nitrogen to plants goes to________?
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A. Theodore-saussure

B. Dr.Muhammad Sharif

C. Sach and knoop

D. Shafiq Baloch at.el

2430. In Pakistan, approximately __________ mha of irrigated land is affected by salinization:
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A. 8.2 mha

B. 5.7 mha

C. 12.6 mha

D. None of the above

2431. Which of the following not iodine rich vegetable crops?
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A. Okra

B. French bean & capsicum

C. Brinjal

D. both B & C
2432. Silica tetrahedron is__________?
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A. Six sided arrangement

B. Eight sided arrangement

C. Four sided arrangement

D. both A & B

2433. Oxygen and Silicon together comprise approximately ______ %of the earth crust?
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A. 73%

B. 75 %

C. 64%

D. 79%

2434. Based on their diameters, soil pores are divided into:_________?
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A. Macro pores

B. Meso pores & Micro pores

C. Both A & B

D. The above statement is wrong

2435. __________ particles range in diameter between 0.02 to 0.002 mm:
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A. Sand

B. None of the above

C. Clay

D. Silt
2436. Specific heat is higher in:
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A. Clay

B. Humus

C. both A & B

D. Only Clay

2437. In Pakistan, Nitrophos is manufactured in_________?
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A. Multan

B. Sawat

C. Lasbella

D. Shikarpoor

2438. The insect head is essentially a capsule which encloses the brain and bears the usually external (ectognathous) mouthparts, the eyes and a pair of sensory antennae. The mouth part comprise basic sections as:
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A. a tongue-like hypopharynx; the jaws (mandibles)

B. All of these

C. The paired maxillae and a lower lip (labium).

D. An upper lip (labrum), lower (ventral) surface of which forms the epipharynx

2439. What is the effect of application of P2O5 fertilizer to a green manure leguminous crop in the availability of phosphorus to the succeeding crop?
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A. It does not affect the availability of phosphorous to succeeding crop

B. Green manure increases the availability in organic from to the next crop

C. Greater amount of phosphorus is taken up and converted into organic form, which is released on decomposition of green matter

D. It fixes the P2O5 through humus and reduces the availability..

2440. The mineral component of soil consists of_________?
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A. Air

B. Water

C. both A and B

D. none of the above