Introduction to Pomology MCQs (Quiz 20) Posted on July 25, 2026Author agropublishers 0 1. The principal purpose of applying GA₃ after berry set in table grapes is to _________________________ Delay fruit ripening Induce flowering Increase berry size Prevent fruit cracking 2. In table olives, plant growth regulator ______________ is typically applied to reduces flower and fruit set promote larger fruit size and reduce the need for manual thinning Gibberellic acid (GA3) None of these 2,4-D (2,4-dichlorophenoxyacetic acid) Abscisic acid 3. Which orchard system depends most heavily on dwarfing rootstocks? Alley cropping Ultra High-Density Planting Rainfed orchards Traditional orchards 4. Post-bloom GA3 application in table grapes primarily acts by ___________________ Accelerating anthocyanin synthesis in the berry skin Inhibiting gibberellin biosynthesis in the pedicel Elongating the pedicel and rachis to reduce cluster compactness while enlarging berries Triggering abscission of immature florets 5. __________________ is the resumption of growth after dormancy Vernalization Anthesis Fruit set Bud break 6. In modern orchards, the principal purpose of canopy management is to optimize _______________________________________________________ Root respiration Pollination Nitrogen fixation Light interception and photosynthetic efficiency 7. _______________________________ is a direct consequence of having fewer sinks after thinning Increased transpiration Reduced leaf area Increased sugar availability per fruit Reduced sugar production 8. Potential disadvantage of somaclonal variation in commercial micropropagation includes ________________ Loss of desirable clonal traits in some regenerants Increased genetic uniformity Elimination of all epigenetic changes Complete sterility of all regenerated plants 9. The principal function of scaffold branches is to _______________ Conduct photosynthesis Support the framework of the tree crown Produce bark Absorb water 10. Fruit thinning is usually performed to optimize the tree’s _________________ Root respiration Source–sink balance Water absorption Seed dormancy Loading … Question 1 of 10
