Free Agronomy MCQs with Answers
312 Agronomy MCQs from Agriculture, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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- A. All of Above
- B. SSP
- C. Nitrophos
- D. DAP
Explanation: DAP, SSP and nitrophos are all commercially important phosphatic fertilizers used in Pakistan.
Correct answer: All of Above- A. Top dressing
- B. Broad casting
- C. Basal placement
- D. both A and B
Explanation: Phosphorus moves very little in soil, so phosphatic fertilizer is best applied as a basal dose near or below the seed before or at sowing.
Correct answer: Basal placement- A. Soil Productivity
- B. Increased crop production
- C. both a and B
- D. None of theseFind Geological Maps
Explanation: INM combines mineral fertilizers with organic manures, crop residues and biofertilizers to maintain soil productivity while supporting…
Correct answer: both a and B- A. P
- B. Cu
- C. Cl
- D. N
Explanation: Rain leaches and washes soluble nitrogen compounds from exposed manure, making nitrogen the nutrient most readily lost.
Correct answer: N- A. Quantom sensor
- B. Pyrgeometer
- C. Pyrheliometer
- D. Both A & C
Explanation: A quantum sensor measures photosynthetically active radiation, usually expressed as photosynthetic photon flux in the 400–700 nm range.
Correct answer: Quantom sensor- A. Sun hemp
- B. Dhaincha
- C. Both of the above
- D. None of the above
Explanation: Dhaincha is widely regarded as an outstanding green-manure crop because it produces abundant biomass and fixes atmospheric nitrogen…
Correct answer: Dhaincha- A. Wheat
- B. Cotton
- C. Mustard
- D. Rice
Explanation: Rice prefers and efficiently absorbs nitrogen in ammonium form because flooded soils become reducing and favour ammonium over nitrate.
Correct answer: Rice- A. Decreases
- B. Increases
- C. Constant
- D. None of theseAccess Government Careers
Explanation: More chlorophyll means greater absorption of incoming solar radiation for photosynthesis, so less radiation passes through or is…
Correct answer: Decreases- A. Harmful
- B. Beneficial
- C. Both a and b
- D. None of the above
Explanation: Silicon is a beneficial, rather than generally essential, element for most higher plants, and it can improve resistance to pests…
Correct answer: Beneficial- A. All of these
- B. Hemicellulose
- C. Lignin
- D. Cellulose
Explanation: Cellulose is the most abundant organic compound in nature because it forms the structural cell walls of plants and is produced in enormous…
Correct answer: Cellulose- A. Nickle
- B. Cobalt
- C. Sodium
- D. Vanadium
Explanation: Nickel was recognized as the seventeenth essential plant nutrient, so “seventieth” is a typographical error for “seventeenth.” The other…
Correct answer: Nickle- A. 10%
- B. 20%
- C. 30%
- D. 35%
Explanation: Earth reflects about 30% of the incoming solar radiation back to space; this reflectivity is its albedo.
Correct answer: 30%- A. Tofography
- B. topograpy
- C. Topography
- D. All of the above
Explanation: Topography describes the configuration of a surface, including the arrangement and relationships of its natural and human-made features.
Correct answer: Topography- A. Growing of pastures in between two widely spaced rows of fast growing trees
- B. Growing of field crops in between two widely spaced rows of fast growing trees
- C. Growing of only short duration crops in between two widely spaced rows of fast growing trees
- D. Growing of only fooder crops in between two widely spaced rows of first growing trees
Explanation: Alley cropping places ordinary field crops between widely spaced rows of trees or shrubs.
Correct answer: Growing of field crops in between two widely spaced rows of fast growing trees- A. Etiolation is not a reversible process
- B. Etiolation is genetically while albinism is physiological
- C. Etiolation is physiological while albinism is genitival
- D. Etiolation and albinism are synonyms
Explanation: Etiolation is a reversible physiological response to darkness, producing pale, elongated plants, whereas albinism is generally a…
Correct answer: Etiolation is physiological while albinism is genitival- A. Glaciers
- B. Tundra
- C. Barren land
- D. None of the above
Explanation: The tundra is a cold, treeless biome found mainly in Arctic regions, with low-growing vegetation and permanently or seasonally frozen…
Correct answer: Tundra- A. 14%
- B. 46%P
- C. 40%P
- D. 50%P
Explanation: Triple superphosphate is conventionally graded as about 46% P₂O₅, the fertilizer-label form of phosphorus, and contains little or no…
Correct answer: 46%P- A. 21
- B. 23
- C. 33
- D. 39
Explanation: Ammonium nitrate contains about 33 to 34% nitrogen, commonly stated as 33% in basic MCQs.
Correct answer: 33- A. Troposphere
- B. Thermosphere
- C. Mesosphere
- D. Stratosphere
Explanation: The troposphere is the lowest atmospheric layer and lies directly above Earth’s surface.
Correct answer: Troposphere- A. SO
- B. SO2
- C. SO3
- D. None of the above
Explanation: Sulfur dioxide is a primary pollutant because it is emitted directly from sources such as coal combustion and industrial processes.
Correct answer: SO2