All Free Agriculture MCQs with Answers
Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
2,315 questions · page 24 of 116
- A. Photosynthesis
- B. Nitrogen fixation
- C. aeration
- D. Respiration
Explanation: Root nodules of leguminous plants house Rhizobium bacteria, which convert atmospheric nitrogen into forms usable by the plant.
Correct answer: Nitrogen fixation- A. Delay in germination
- B. Delay in growth
- C. Delay in ripening
- D. All the above
Explanation: Excess nitrogen promotes prolonged vegetative growth and can delay crop maturity and ripening.
Correct answer: Delay in ripening- A. Leaves
- B. All the above
- C. Grain
- D. Straw
Explanation: Potassium is relatively mobile in plants and is commonly concentrated in vegetative parts, especially straw, rather than being stored…
Correct answer: Straw- A. Active transport
- B. Passive transport
- C. Absorption
- D. Dissolution
Explanation: Active transport moves substances against their concentration gradient and therefore requires cellular energy, usually ATP.
Correct answer: Active transport- A. Woodstock (1973)
- B. Maguire (1962)
- C. Moore (1973)
- D. Germ (1950)
Explanation: Moore (1973) is associated with recommending tetrazolium staining for evaluating seed quality and viability.
Correct answer: Moore (1973)- A. Fodder crops
- B. Leguminous crops
- C. Fiber crops
- D. Cereal crops
Explanation: Cereal crops are cultivated mainly for their grains, including wheat, rice, maize and barley.
Correct answer: Cereal crops- A. Chlorosis
- B. Leucoplast
- C. Chromoplast
- D. Chromoplast
Explanation: Chlorosis is the yellowing or pale colour of normally green plant tissue, usually caused by loss of chlorophyll or a nutrient deficiency.
Correct answer: Chlorosis- A. Metabolism
- B. Photosynthesis
- C. Absorption
- D. Assimilation
Explanation: Photosynthesis uses carbon dioxide and water, with light energy, to form carbohydrates in green plants.
Correct answer: Photosynthesis- A. Yield performance
- B. Photosynthesis
- C. Root length of seeding
- D. All the above
Explanation: Drought response can be assessed through yield performance, reduced photosynthesis and traits such as seedling root length.
Correct answer: All the above470. The experimental design which control fertility level in two directions is known as________________?
- A. LSD
- B. SPD
- C. AD
- D. RBD
Explanation: A Latin square design controls variation in two directions by arranging treatments in rows and columns, while also accounting for…
Correct answer: LSD- A. Crop sequence
- B. Crop rotation
- C. Cropping system
- D. Crop management
Explanation: Crop rotation means growing different crops, and sometimes pasture or fallow, in a planned sequence on the same land to maintain…
Correct answer: Crop rotation- A. tropical
- B. Temperature
- C. Sub tropical
- D. all
Explanation: Sindh has a generally hot, dry subtropical climate, although local conditions vary between the coast, irrigated plains and desert areas.
Correct answer: Sub tropical- A. Growing different crops
- B. Growing green manures
- C. Same craps
- D. Growing fodder crops
Explanation: Crop rotation is the planned succession of different crops on the same land over successive seasons or years.
Correct answer: Growing different crops- A. Thermophytes
- B. Xerophytes
- C. Hydrophytes
- D. Haplophytes
Explanation: Xerophytes are plants adapted to dry habitats, often having deep roots, reduced leaves, or other water-conserving features.
Correct answer: Xerophytes- A. Low temperature
- B. Humidity
- C. High temperature
- D. Cloudy day
Explanation: High temperature, especially when combined with moisture stress, can cause cotton squares and flowers to shed before boll formation.
Correct answer: High temperature- A. Peshawar
- B. Islamabad
- C. Rawalpindi
- D. Chakwal
Explanation: The Barani Agricultural Research Institute is located at Chakwal, an important rainfed farming region of Punjab.
Correct answer: Chakwal477. The ratio of actual cultivated area to a total farm area over a year is called__________________?
- A. Cropping intensity
- B. Cropping pattern
- C. Cost-benefit ratio
- D. None of the above
Explanation: Cropping intensity measures how intensively land is used during a year, usually as gross cropped area divided by net cultivated or sown…
Correct answer: Cropping intensity- A. Biosystem
- B. Symbiosis
- C. Auto environment
- D. Climate
Explanation: Symbiosis is a prolonged, close association between organisms of different species, with effects that may be beneficial, harmful, or…
Correct answer: Symbiosis- A. fertilizer placement
- B. fertilizer use efficiency
- C. Balanced fertilization
- D. Nitrogen use efficiency
Explanation: Balanced fertilization supplies nutrients in suitable proportions according to crop requirements, rather than emphasizing only nitrogen or…
Correct answer: Balanced fertilization480. The total dry matter produced by a plant as a result of photosynthesis is called_________________?
- A. Crop growth
- B. Harvest index
- C. Dry matter
- D. Biological yield
Explanation: Biological yield is the total accumulated plant dry matter, including the harvested product and the remaining plant parts.
Correct answer: Biological yield