Free Agronomy MCQs with Answers

• A. Siliviculture
• B. Sericulture
• C. Regeneration
• D. Nursery

Explanation: Regeneration is the establishment of a new crop or stand, either naturally from existing seed and growth or artificially through human…

• A. Sericulture
• B. Agro forestry
• C. range forestry
• D. Forestry

Explanation: Forestry is the science and practice of establishing, managing, and raising trees and forest resources.

• A. Long day plants
• B. Short day plants
• C. Photoperiod
• D. Phototropism

Explanation: Long-day plants begin flowering when day length exceeds a critical duration, or when the uninterrupted night becomes sufficiently short.

• A. Fates
• B. Starch
• C. Cellulose
• D. Protein

Explanation: Cotton fibre is a long, greatly elongated plant cell whose wall is composed mainly of cellulose.

• A. None of the above
• B. Phagocytosis
• C. Imbibitions
• D. Pinoeytosis

Explanation: Pinocytosis is the uptake of liquid or dissolved substances by forming tiny vesicles from the cell membrane, so it is often called cell…

• A. Albinism
• B. Acrodsome
• C. Agoun
• D. None of the above

Explanation: Albinism in plants refers to the absence or severe deficiency of chlorophyll, producing pale or white tissues.

• A. All the above
• B. Castor
• C. Colocasia
• D. Maize

Explanation: Maize, castor and Colocasia bear separate male and female flowers on the same plant, which makes each species monoecious.

• A. Chloroplast
• B. Chromoplast
• C. Leucoplast
• D. Chlorsis

Explanation: Chlorosis is the loss or reduction of green chlorophyll colour, causing leaves to appear pale yellow.

• A. Hydrogen
• B. Carbon dioxide
• C. Nitrogen
• D. Oxygen

Explanation: During daylight, photosynthesis generally exceeds respiration in green plants, giving a net release of oxygen.

• A. 800-1200 Kg
• B. 1200 Kg
• C. 500 Kg
• D. 5000 Kg

Explanation: Potato seed tuber requirements commonly range from about 800 to 1,200 kg per hectare, depending on tuber size and planting distance.

• A. Transportation
• B. Fermentation
• C. Sterilization
• D. Ripening

Explanation: Fermentation is the anaerobic breakdown of organic substances when oxygen is absent, often producing alcohol or organic acids.

• A. Leucoplast
• B. Protoplast
• C. Chromoplast
• D. Chloroplast

Explanation: Chloroplasts contain chlorophyll and the enzymes of photosynthesis, with light reactions occurring in their thylakoid membranes and carbon…

• A. 25-35°C
• B. 18-24°C
• C. 20-25°C
• D. 10-20°C

Explanation: Warm-season crops grow best under relatively high temperatures, commonly about 25–35°C.

• A. 0°C
• B. -1°C
• C. 1°C
• D. 2°C

Explanation: Tender crops are injured by freezing conditions, so they generally cannot tolerate temperatures at or below 0°C.

• A. Absolute temperature
• B. Various temperature
• C. Cardinal temperature
• D. All the above

Explanation: The minimum, optimum and maximum temperatures for a crop are its cardinal temperatures.

• A. Heat of vaporization
• B. Heat energy
• C. Heat of fusion
• D. Mechanical heat

Explanation: Heat required to convert one kilogram of liquid into vapour at its boiling point is the latent heat of vaporization.

• A. 1
• B. 2
• C. 3
• D. 4

Explanation: In Pakistan, potato is commonly grown in three seasonal crops: autumn, spring and summer, with the summer crop mainly associated with…

• A. Senescence
• B. Partial Senescence
• C. Complete Senescence
• D. All the above

Explanation: Complete senescence occurs when the whole plant body dies while the seeds remain viable for continuation of the species.

• A. Fruit ripening
• B. Maturity
• C. Both a & b
• D. Senescence

Explanation: Senescence is the genetically regulated aging process in which plant tissues deteriorate and eventually die.

• A. Hypocotyle
• B. Micropyle
• C. Epictyl
• D. None of the above

Explanation: The hypocotyl is the embryonic stem region below the cotyledons and above the radicle.