agriculture MCQs – Page 143

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 Review each marked answer and report any item that may be outdated or unclear.

2841. Which type of structure is dominant in grasslands:
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A. Spheroidal or Sphere-like

B. Prismatic & Columnar

C. Platy & Luminar

D. Angular blocky Sub-angular blocky

2842. Extrusive rocks are also called as ___________ in which the grain or crystalline structure is too fine to be seen by the unaided eye?
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A. Volcanic Rock

B. Igneous Rock

C. Aphantic Rock

D. Both A & B

2843. Items needed for synthesis of plant food in green leaves are _________ & the process through which it takes place is called photosynthesis:
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A. Sunlight

B. All of the above

C. Chlorophyll

D. Water & plant nutrients

2844. Plants which grow on sandy soils:_________?
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A. Psammophytes

B. None of these

C. Lithophytes

D. Chasmophytes

2845. __________________ systems play a crucial role in increasing soil organic C storage and reducing net emissions of greenhouse gases in addition to soil erosion control:
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A. All of the above

B. Agroforestry

C. Engineering

D. Cultivating

2846. calcium is immobile in plants. Therefore, under conditions of deficiency, young tissue is affected first. calcium deficiency symptoms are:
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A. Death of terminal buds; roots tips also affected

B. Abnormal dark green appearance of foliage

C. All of the above

D. Premature shedding of blossoms & buds & weakened stem

2847. In which form plant uptake phosphorus?
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A. Both

B. HPO4-2

C. Non of these

D. H2po4

2848. From the sources of plant nutrients availability in soil, which of the following statements are correct:
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A. Air & water is the source of oxygen & the chief source of soil nitrogen is organic matter & when organic matter decomposes it gives ammonia.

B. All of the above

C. The plant absorbs carbon as carbondioxides directly from the atmosphere.

D. Water is the source of hydrogen

2849. Effects of soil pollution may also include:___________?
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A. All of the above

B. Soil structure is damaged or polluted soil may no longer grow crops & fodder

C. Crops & fodder grown on polluted soil may pass the pollutants on to the consumers

D. Pollution runs-off into rivers & kills the fish, plant & other aquatic life

2850. The soil texture refers to the relative proportion of sand,__________ and clay:
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A. Soil

B. Silt

C. Stone

D. Rock

2851. The forest soils have lower bulk density than agricultural soils because of their ______ content.
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A. High organic matter

B. Low organic matter

C. Both a & b

D. None of these

2852. Generally speaking, only level to nearly level (0-2 % slope) & gently sloping lands (2-5 % slope) should be:
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A. brought under range crops

B. Forests

C. Both a & b

D. None of the above
2853. Conversion of inorganic P to organic P is known as:_________?
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A. Mineralization

B. Immobilization

C. Solubilization

D. both A & C

2854. In acidic soil which form of phosphorus uptake by plants?
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A. Both

B. None of these

C. Secondary orthophosphate

D. Primary orthophosphate
2855. Deforestation may decrease the chances of__________?
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A. land sliding

B. None of these

C. Wind erosion

D. Rainfall
2856. Auxin is_______?
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A. An enzyme

B. A vitamin

C. A protein

D. A hormone
2857. The drawbacks of erosion can be divided into:__________?
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A. Onsite damages

B. Offsite damages

C. Both A & B

D. None of the above

2858. One of the following is not a form of water erosion:
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A. Sheet erosion

B. Rainsplash erosion

C. Saltation

D. Rill erosion

2859. Availability of Phosphorus is maximum at:__________?
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A. Acidic

B. Neutral

C. None of these

D. Alkaline

2860. The study of relationship between soil properties & plant production is known as:_________?
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A. Soil Science

B. None of these

C. Agronomy

D. Pedology