All Free Agriculture MCQs with Answers

• A. Maguire (1962)
• B. Kotowski (1962)
• C. Baskin (1972)
• D. Nicolls &Heydecker (1968)

Explanation: The mean germination time formula is credited to Nichols and Heydecker (1968) and gives the average time required for seeds to germinate.

• A. Barries ei al. (1969)
• B. Maguire (1963)
• C. Moore (1973)
• D. Woodstock (1976)

Explanation: Burris and colleagues (1969) reported a positive relationship between tetrazolium staining patterns and soybean seed quality.

• A. Burries etc (1969)
• B. Moore (1973)
• C. Maguare (1962)
• D. Kotowski (1926)

Explanation: Moore (1973) described tetrazolium testing for seed-quality assessment and interpreted the topographical staining patterns of seed…

• A. 1:2
• B. 1:3
• C. 1:4
• D. 1:5

Explanation: For breeder-seed multiplication involving A and B lines, the commonly prescribed planting ratio is 1:4, with the male or maintainer rows…

• A. 500 plant progenies
• B. 400 plant progenies
• C. 300 plant progenies
• D. 200 plant progenies

Explanation: Nucleus seed production in pulses requires at least 500 plant progenies so that superior, uniform plants can be selected and their…

• A. Oxidation
• B. Plasmolysis
• C. Osmosis
• D. Deplasmolysis

Explanation: Plasmolysis occurs when a plant cell loses water and its protoplasm shrinks away from the cell wall, usually in a hypertonic solution.

• A. Cotton varieties
• B. Sugarcane varieties
• C. Wheat varieties
• D. All the above

Explanation: The Green Revolution began chiefly through the development and adoption of high-yielding, fertilizer-responsive wheat varieties…

• A. Apomictie crop
• B. Often cross pollinated crop
• C. Cross pollinated crop
• D. Self pollinated crop

Explanation: Wheat is predominantly self-pollinated because its flowers usually pollinate within the same floret before opening.

• A. Lodging
• B. Insect pest
• C. Disease
• D. Viruses

Explanation: Dwarf wheat varieties have shorter and stronger culms, so they are less likely to bend or fall under wind, rain or heavy grain heads.

• A. Accaumatization
• B. Domestication
• C. Selection
• D. Introduction

Explanation: The adjustment of crop plants to a new environment is called acclimatization, commonly spelled acclimatisation in British usage.

• A. Grow better then cultivated plants
• B. Serve, as valuable fodder plants
• C. Needed to understand the origin of cu;cultivated plants
• D. Carrying many useful genes which are lost in cultivated plants

Explanation: Wild relatives often retain resistance, quality and environmental-adaptation genes that were lost during crop domestication and selection.

• A. 70
• B. 20
• C. 85
• D. 90

Explanation: Foundation groundnut seed is required to have a minimum germination percentage of 85% under the usual seed standards.

• A. Orthodox seeds
• B. Active seeds
• C. Recalcitrant seeds
• D. Certified seeds

Explanation: Orthodox seeds tolerate drying to low moisture content and can be stored at low temperatures without losing viability.

• A. Pruning
• B. Weeding
• C. Rouging
• D. None of the above

Explanation: Rouging means identifying and removing off-type or diseased plants from a crop so varietal purity is maintained.

• A. G.arbarieum and G. rainmundii
• B. G.arbarieum and G.thurberii
• C. G.arbarieum and G.barbadense
• D. G.arbarieum and G.herbaceum

Explanation: Gossypium hirsutum, the main American or upland cotton, is traditionally described as arising from a cross between G. arboreum and G.

• A. Diploid
• B. Tetraploid
• C. Triploid
• D. Haploid

Explanation: Gossypium arboreum is diploid, with 2n = 26 chromosomes, and belongs to the Old World cotton group. Tetraploid cottons include G.

• A. G. arborium
• B. G. hirsutum
• C. G. barb dense
• D. Non of these

Explanation: Gossypium hirsutum is commonly called American cotton or upland cotton and is the most widely cultivated cotton species. G.

• A. Xanthomonas campestris
• B. Ustilago maydis
• C. Puccinia graminis
• D. Phytophthora infestansAgronomy study materials

Explanation: Late blight is caused by the oomycete Phytophthora infestans, especially under cool, humid conditions.

• A. Either DNA or RNA
• B. DNA
• C. RNA
• D. Both RNA and DNA

Explanation: A plant virus contains either RNA or DNA as its genetic material, but normally not both.

• A. Aphid
• B. Brown plant hopper
• C. Mango hopper
• D. White-backed plant hopper

Explanation: Rice hopper burn is classically associated with brown planthopper feeding, which removes sap and injects toxic substances into the plant.