agriculture MCQs – Page 131

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 Review each marked answer and report any item that may be outdated or unclear.

2601. In cotton, zn deficiency is known as_________?
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A. Mottle leaf

B. None of these

C. Fern leaf

D. Little leaf
2602. Association of two microorganisms in which one is benefited while other remains unaffected is known as:________?
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A. Competetion

B. Commensalism

C. Ammensalism

D. This statement is wrong

2603. What are diatoms?
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A. Soil Bacteria

B. None of these

C. Soil Algae

D. Soil Fungi

2604. Basalt is a __________ rock:
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A. fine-grained

B. Dark coloured

C. both A & B

D. None of the above

2605. Although some acid soils do exist in the northern mountainous regions of Pakistan (Mansehra, Sawat, Dir). Almost all cultivated soils of the country are ________________, with high base saturation and low organic matter content (generally less than 1%)?
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A. Alkaline

B. Very much acidic

C. Calcareous

D. both A & C
2606. Fossils are found in__________type of rocks:
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A. Sedimentary rocks

B. Metamorphic rocks

C. Aqueous rocks

D. both A & C
2607. swelling clay soils, develop cracks due to greater proportion of swelling type clays:
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A. Vertisols

B. Alfisols

C. None of the above

D. Ultisols

2608. C:N ratio of microorganism:
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A. 10:1-15:1

B. 15:1-20:1

C. N0ne of the above

D. 4:1-8:1

2609. Small rivulets or finger like channels formed on the surface of earth by action of water, these channels are of small depth & can be leveled by tillage operations is:
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A. None of these

B. Gully erosion

C. Stream bank erosion

D. Sheet erosio.

2610. Pakistan has _________% area under forest?
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A. None of these

B. 5.7%

C. 10%

D. 3.50%

2611. Which of the following is not the soil order prevail in Pakistan?
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A. Alfisols

B. Mollisols

C. Aridisols

D. None of the above
2612. Cotton bollworms, sugarcane borers are_____________?
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A. Key pest

B. Major pest

C. Secondary pest

D. I do not agree with above statement

2613. The major soil fertility problems in Pakistani soils deficiencies of N, P and Zn. Deficiencies K, Fe, and B also occur in specific crop genotypes or soil types, while deficiencies of S, Cu, and Mn are negligible. however, the common nutrient deficiencies are_________________: and some micronutrients including Mo?
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A. N, P, K

B. Ca, Mg, S

C. both A & B

D. The above statement is wrong

2614. The horizons O, A, E and B (other than r and C) are collectively called_____________?
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A. Regolith

B. Outer core

C. inner core

D. Solum
2615. Organic (O) horizon is absent in_________?
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A. Non-arable soils

B. Mollisols

C. Arable soils

D. Histosols

2616. Which of the following statement is wrong regarding, Soil ____________?
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A. Dirt which is threat to all living life & crop production

B. Medium for plant growth & Habitat for organisms

C. Regulates water supply & recycles waste materials

D. Engineering medium & modifies the atmosphere

2617. Each layer of phyllosilicates is composed of two types of sheets:
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A. Tetrahedral sheet

B. Triple octahedral sheet

C. Octahedral sheet

D. Both A & C
2618. _________is probably the most important growth limiting factor in acid soils especially those having pH below 5.0-5.5?
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A. Calcium

B. Potassium

C. Aluminium

D. Nitrogen

2619. Organic matter in Pakistani soils is generally:_________?
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A. less than 1 %

B. 3%

C. less than 10 %

D. 5%

2620. The resistance of a soil at various moisture contents to mechanical stresses or manipulations:
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A. Soil crusting

B. Soil consistence

C. Bulk Density

D. Both a & c