Free Agronomy MCQs with Answers

• A. Impaction
• B. Abrasion
• C. Stratification
• D. Scarification

Explanation: Impaction breaks dormancy by striking or hitting a seed against a hard surface, which can crack or weaken the seed coat.

• A. Barani crop
• B. Dubari crop
• C. Ratoon crop
• D. Sure crop

Explanation: A dubari crop is grown on the residual moisture left in the soil after the main crop, commonly rice, is harvested.

• A. Exudation
• B. Respiration
• C. Transpiration
• D. Evaporation

Explanation: Transpiration is the loss of water vapour from plant surfaces, mainly through stomata in the leaves.

• A. Protein activator
• B. None of the above
• C. Starch activator
• D. Enzyme activator

Explanation: Magnesium activates many plant enzymes and is also the central atom in chlorophyll.

• A. Kittock and Law (1963)
• B. Germ and Keitreiber (1954)
• C. Maguire (1963)
• D. Moore (1973)

Explanation: Kittock and Law described a vigour-estimation method based on the intensity of staining in seeds, with stronger staining indicating more…

• A. Whole plant
• B. Leaves
• C. Stem only
• D. Flowers only

Explanation: Foliar application places a nutrient solution directly on the leaves, where it can enter through the leaf surface and stomata.

• A. Plumule
• B. Radicle
• C. Coleoptile
• D. Coleorluza

Explanation: The radicle is the embryonic root and grows downward to form the primary root.

• A. Photosynthesis
• B. Aeration
• C. Nitrogen fixation
• D. Respiration

Explanation: Root nodules of legumes contain Rhizobium bacteria, which convert atmospheric nitrogen into forms usable by the plant.

• A. 43560 Sq ft in an acre
• B. 40560 Sq ft in an acre
• C. 46560 Sq ft in an acre
• D. 47560 Sq ft in an acre

Explanation: One acre is a standard land unit equal to 43,560 square feet. The other figures are incorrect variations of this conversion.

• A. 75-90 NP kg/ha
• B. 136-85 NP kg/ha
• C. 110-60 NP kg/ha
• D. 100-70 NP kg/ha

Explanation: For wheat on medium loamy soil, the listed recommendation is 136 kg nitrogen plus 85 kg phosphorus per hectare, expressed as NP.

• A. 5
• B. 3
• C. 4
• D. 1

Explanation: Sindh is commonly divided into four agro-ecological regions, reflecting differences in climate, soils, irrigation, and physiography.

• A. Sugarcane
• B. Sorghum
• C. Make
• D. All the above

Explanation: Sugarcane, sorghum and maize are all C4 plants, using the Hatch-Slack pathway and showing high efficiency in hot, bright conditions.

• A. Okra
• B. Methi
• C. Cucurbits
• D. Wee

Explanation: Melilotus alba, or white sweet clover, is recognized as an objectionable weed contaminating methi seed and crop fields.

• A. Carbon cycle
• B. Nitrogen cycle
• C. Nutrient cycle
• D. None of the above

Explanation: A nutrient cycle is the complete movement and transformation of a nutrient through living organisms and the environment until it returns…

• A. 2.8 million hac
• B. 3.75 million hac
• C. 4.00 million hac
• D. 4.5 million hac

Explanation: Sindh’s total cropped area is approximately 4.0 million hectares according to the commonly used agricultural statistics for the province.

• A. And climate
• B. Semi-and climate
• C. Wet climate
• D. None of the above

Explanation: A region receiving less than about 10 inches of annual rainfall is classified as arid, meaning water availability is very limited and…

• A. Intercropping
• B. Monocropping
• C. Doubling cropping
• D. Cropping pattern

Explanation: Growing two successive crops on the same land within one year is called double cropping; “doubling cropping” is the option’s intended…

• A. Dry matter
• B. Seed index
• C. Total yield
• D. Harvest index

Explanation: Harvest index is calculated as economic yield divided by biological yield, multiplied by 100.

• A. Conservation
• B. Sustainability
• C. Crop residue management
• D. None of above

Explanation: Conservation means protecting and wisely managing natural resources so they remain available for future use.

• A. Absolute growth
• B. Indeterminate growth
• C. Assimilation
• D. Determinate growth

Explanation: Indeterminate plants continue producing vegetative and reproductive structures without a fixed endpoint, so flowering and growth may…