All Free Agriculture MCQs with Answers

• A. S. mavretiana
• B. S. aphylla
• C. S. oleaides
• D. Sesbania sesban

Explanation: Jantar is commonly identified botanically as Sesbania sesban, a leguminous plant used for green manuring.

• A. Arid
• B. Tropical
• C. Temperature
• D. None of the above

Explanation: A climate with warm summers and clearly pronounced winters is temperate, not tropical or arid.

• A. And
• B. Temperature
• C. Tropical
• D. None of the above

Explanation: Tropical conditions are characterised by high temperatures and little or no true winter.

• A. Linear planting
• B. Retrogression
• C. Biodiversity
• D. Succession

Explanation: Succession is the gradual replacement of one plant community by another over time.

• A. Tundra
• B. Barren land
• C. Glaciers
• D. None of the above

Explanation: Tundra is the treeless, cold biome of the Arctic and other high-latitude regions.

• A. SO3
• B. SO2
• C. SO4
• D. None

Explanation: Sulfur dioxide is released directly from fuel combustion and industrial sources, so it is a primary air pollutant.

• A. Mirgation
• B. Ecosystem
• C. Ecology
• D. Biodiversity

Explanation: Biodiversity means the variety of living organisms, including animals, plants and crop species, within different ecosystems.

• A. Conservation
• B. Substainability
• C. Biodiversity
• D. Environment

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

• A. Product
• B. Substrate
• C. Mycotoxin
• D. None of the above

Explanation: The substrate is the reactant or substance that fits into an enzyme's active site and is converted into product.

• A. Certified seed
• B. Pre-basic seed
• C. Basic seed
• D. Pure seed

Explanation: In the usual seed-certification colour code, a white label identifies basic seed, while certified seed is commonly marked with a blue…

• 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.