1Guava is especially valued as a rich source of which vitamin?
Guava
Easy
A.Vitamin C
B.Vitamin A
C.Vitamin B12
D.Vitamin D
Correct Answer: Vitamin C
Explanation:
Guava is an excellent source of vitamin C, which supports immunity and antioxidant activity.
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2What is the botanical type of guava fruit?
Guava
Easy
A.Nut
B.Pome
C.Berry
D.Drupe
Correct Answer: Berry
Explanation:
Guava is botanically classified as a berry containing many seeds.
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3Which vegetative method is commonly used to propagate guava?
Guava
Easy
A.Seed sowing
B.Planting underground tubers after a long storage period
C.Air layering
D.Runner planting
Correct Answer: Air layering
Explanation:
Air layering is commonly used to produce true-to-type guava plants.
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4Sapota is commonly known in India by which name?
Sapota
Easy
A.Chikoo
B.Phalsa
C.Jamun
D.Aonla
Correct Answer: Chikoo
Explanation:
Sapota is widely known as chikoo or sapodilla in India.
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5Which commercial product is traditionally obtained from the latex of sapota?
Sapota
Easy
A.Natural rubber processed from mature rubber-tree plantations
B.Copra
C.Cocoa
D.Chicle
Correct Answer: Chicle
Explanation:
Sapota latex yields chicle, which was traditionally used in chewing gum.
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6Grape plants grow naturally as which type of plant?
Grape
Easy
A.Underground herbs
B.Erect shrubs
C.Climbing vines
D.Dwarf palms
Correct Answer: Climbing vines
Explanation:
Grapes are climbing vines and are commonly trained on support systems.
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7Which propagation method is commonly used for grape?
Grape
Easy
A.Division of mature plants along with their complete root systems
B.Seed sowing
C.Hardwood cuttings
D.Crown planting
Correct Answer: Hardwood cuttings
Explanation:
Grapes are commonly propagated through hardwood cuttings to maintain varietal characteristics.
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8What are dried grapes commonly called?
Grape
Easy
A.Raisins
B.Dates
C.Figs
D.Prunes
Correct Answer: Raisins
Explanation:
Raisins are produced by drying suitable grape varieties.
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9Which method is most commonly used for the vegetative propagation of litchi?
Litchi
Easy
A.Runner planting
B.Direct sowing of freshly collected seeds in deep nursery beds
C.Tuber division
D.Air layering
Correct Answer: Air layering
Explanation:
Air layering, also called gootee, is the standard commercial propagation method for litchi.
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10What is the white, juicy, edible portion of litchi called?
Litchi
Easy
A.Aril
B.Kernel
C.Seed coat
D.Endocarp
Correct Answer: Aril
Explanation:
The fleshy white portion surrounding the litchi seed is called the aril.
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11What type of fruit is pineapple botanically?
Pineapple
Easy
A.Stone fruit
B.Dry fruit
C.Simple berry
D.Multiple fruit
Correct Answer: Multiple fruit
Explanation:
Pineapple is a multiple or composite fruit formed from an entire inflorescence.
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12Which planting material is commonly used for vegetative propagation of pineapple?
Pineapple
Easy
A.True seeds
B.Large woody branches collected from mature trees
C.Suckers
D.Root cuttings
Correct Answer: Suckers
Explanation:
Pineapple is commonly propagated using suckers, slips, and crowns, with suckers being widely preferred.
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13What is the botanical name for the fruit type of pomegranate?
Pomegranate
Easy
A.Balausta
B.Hesperidium
C.Drupe
D.Pome
Correct Answer: Balausta
Explanation:
The pomegranate fruit is a specialized berry known as a balausta.
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14Which part of the pomegranate is mainly eaten?
Pomegranate
Easy
A.Dried leaves
B.Hard rind
C.Woody stem
D.Juicy arils
Correct Answer: Juicy arils
Explanation:
The juicy arils surrounding the seeds are the main edible portion of pomegranate.
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15Jackfruit is widely recognized as which of the following?
Jackfruit
Easy
A.Largest tree-borne fruit
B.Largest underground fruit
C.A seedless fruit produced only under protected cultivation
D.Smallest berry fruit
Correct Answer: Largest tree-borne fruit
Explanation:
Jackfruit is known as the largest tree-borne fruit in the world.
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16Where are male and female flowers borne in jackfruit?
Jackfruit
Easy
A.Only below ground
B.On the same tree
C.Only on nursery seedlings
D.On separate trees
Correct Answer: On the same tree
Explanation:
Jackfruit is monoecious, meaning separate male and female flowers occur on the same tree.
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17Date palm is described as dioecious because it bears male and female flowers in which way?
Date
Easy
A.Within the same flower
B.On the same branch
C.On separate plants
D.Only on plants grown from vegetative tissues under controlled conditions
Correct Answer: On separate plants
Explanation:
Date palm is dioecious, so male and female flowers are produced on separate plants.
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18Which planting material is traditionally used to propagate true-to-type date palms?
Date
Easy
A.True seeds
B.Leaf cuttings
C.Flower clusters
D.Offshoots
Correct Answer: Offshoots
Explanation:
Offshoots produce true-to-type date palms and bear fruit earlier than seedlings.
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19Ber is well suited to cultivation in which type of climate?
Ber
Easy
A.Cold alpine
B.Permanently waterlogged tropical areas with very high annual rainfall
C.Arid and semi-arid
D.Wet marshy
Correct Answer: Arid and semi-arid
Explanation:
Ber is a hardy fruit crop adapted to arid and semi-arid regions.
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20Which method is commonly used for the commercial propagation of improved ber varieties?
Ber
Easy
A.Crown planting
B.Leaf cutting
C.T-budding
D.Runner planting
Correct Answer: T-budding
Explanation:
Improved ber varieties are commonly propagated by T-budding on suitable rootstocks.
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21A guava grower wants to obtain a high-quality winter crop instead of a low-quality rainy-season crop. Which crop-regulation practice is most appropriate?
Guava
Medium
A.Retain the February–March bloom and stop irrigation during fruit development
B.Suppress the June–July bloom and encourage flowering during February–March
C.Retain all seasonal blooms and increase nitrogen application throughout the year
D.Suppress the February–March bloom and resume irrigation before the June–July bloom
Correct Answer: Suppress the February–March bloom and resume irrigation before the June–July bloom
Explanation:
Suppressing the spring bloom prevents the rainy-season crop. Encouraging the June–July bloom produces fruits during winter, when guava quality and market value are generally better.
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22In a high-density guava orchard, trees develop excessive canopy crowding and fruiting shifts away from manageable shoots. Which intervention is most suitable?
Guava
Medium
A.Prune regularly to stimulate productive current-season shoots
B.Avoid pruning to preserve all old fruit-bearing branches
C.Allow upright shoots to grow without height control
D.Remove only the roots near the irrigation channels
Correct Answer: Prune regularly to stimulate productive current-season shoots
Explanation:
Guava bears largely on current-season growth. Regular pruning controls canopy size and promotes new productive shoots under high-density planting.
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23A nursery has vigorous guava seedling rootstocks and wants to multiply a superior cultivar while maintaining its genetic identity. Which method is most appropriate?
Guava
Medium
A.Sowing seeds collected from the cultivar's largest fruits
B.Dividing the mature tree into rooted crown sections
C.Planting open-pollinated seedlings after visual selection
D.Patch budding the cultivar onto the seedling rootstocks
Correct Answer: Patch budding the cultivar onto the seedling rootstocks
Explanation:
Patch budding is a vegetative method that preserves the cultivar's genetic identity while using the established root system of a seedling rootstock.
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24A nursery manager requires uniform, true-to-type sapota plants with a strong and compatible root system. Which propagation combination should be selected?
Sapota
Medium
A.Rooting mature leaves directly in nursery beds
B.Budding the cultivar onto citrus rootstock
C.Sowing seeds from selected ripe sapota fruits
D.Grafting the cultivar onto khirni rootstock
Correct Answer: Grafting the cultivar onto khirni rootstock
Explanation:
Khirni is a widely used compatible rootstock for sapota. Grafting produces true-to-type plants and avoids the variability associated with seedlings.
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25A sapota fruit appears full-sized, but the grower is unsure whether it has reached harvest maturity. Which observation most reliably supports harvesting?
Sapota
Medium
A.The fruit becomes very soft while still attached to the tree
B.The peel turns bright red and separates naturally from the pulp
C.The skin becomes dull brown and scratching reveals yellowish tissue
D.The skin remains green and scratching releases abundant white latex
Correct Answer: The skin becomes dull brown and scratching reveals yellowish tissue
Explanation:
Mature sapota develops a dull brown surface, loses much of its scurfy coating, and shows yellowish rather than green tissue when lightly scratched.
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26A grape cultivar has poorly fruitful basal buds but highly fruitful buds farther along the cane. Which pruning strategy should be adopted?
Grape
Medium
A.Remove all one-year-old canes from the vine
B.Retain longer canes with more buds during fruit pruning
C.Head back every shoot to the permanent cordon
D.Use short spurs containing only one or two basal buds
Correct Answer: Retain longer canes with more buds during fruit pruning
Explanation:
When basal buds are unfruitful, cane pruning retains buds located farther from the cane base, increasing the number of fruitful shoots.
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27In a tropical grape-growing region following double pruning, what is the main purpose of foundation pruning and fruit pruning?
Grape
Medium
A.Foundation pruning develops canes; fruit pruning induces the crop
B.Foundation pruning induces fruit; fruit pruning develops roots
C.Foundation pruning thins berries; fruit pruning controls weeds
D.Foundation pruning ripens fruit; fruit pruning renews rootstocks
Correct Answer: Foundation pruning develops canes; fruit pruning induces the crop
Explanation:
Foundation or back pruning promotes healthy vegetative canes. Later fruit or forward pruning regulates the number of buds retained for crop production.
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28A seedless grape vineyard produces compact clusters with small berries. Which growth-regulator program would best address both problems?
Grape
Medium
A.Apply auxin only after the berries have fully ripened
B.Apply ethylene before bloom and cytokinin after harvest
C.Apply abscisic acid at bloom and again during pruning
D.Apply gibberellic acid around bloom and again after fruit set
Correct Answer: Apply gibberellic acid around bloom and again after fruit set
Explanation:
Gibberellic acid around bloom helps loosen or thin clusters, while post-set application promotes berry enlargement in seedless grapes.
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29A litchi orchard experiences severe fruit cracking after a dry period followed by heavy irrigation. Which management change is most appropriate?
Litchi
Medium
A.Maintain uniform soil moisture through irrigation and mulching
B.Withhold water completely from flowering until harvest
C.Apply a heavy nitrogen dose immediately before ripening
D.Prune all fruiting terminals during early fruit development
Correct Answer: Maintain uniform soil moisture through irrigation and mulching
Explanation:
Sudden water uptake after drought can rapidly expand the aril and split the peel. Regular irrigation and mulching reduce moisture fluctuations and cracking.
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30A large block of one litchi cultivar flowers heavily but shows poor fruit set because insect activity and pollen transfer are limited. Which action is most suitable?
Litchi
Medium
A.Exclude insects by netting the orchard during flowering
B.Introduce bee colonies and maintain compatible flowering cultivars
C.Remove all male-phase flowers from the orchard
D.Apply high nitrogen doses to suppress panicle development
Correct Answer: Introduce bee colonies and maintain compatible flowering cultivars
Explanation:
Litchi benefits from insect-mediated pollen transfer. Bee activity and compatible cultivars with overlapping bloom improve effective pollination and fruit set.
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31A pineapple grower wants the earliest possible crop from vegetative planting material. If all materials are healthy and uniform, which should be preferred?
Pineapple
Medium
A.Large suckers arising from the plant base
B.Crowns removed from harvested fruits
C.Seeds extracted from mature fruits
D.Slips developing below the fruit
Correct Answer: Large suckers arising from the plant base
Explanation:
Suckers are physiologically more advanced and generally flower and fruit earlier than slips or crowns. Pineapple seeds are unsuitable for uniform commercial production.
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32A pineapple field has plants of adequate size but highly uneven natural flowering. Which treatment is commonly used to synchronize flowering?
Pineapple
Medium
A.Spray abscisic acid to stop inflorescence emergence
B.Apply auxin paste to the harvested fruit crowns
C.Spray gibberellic acid to delay floral initiation
D.Apply an ethephon-based flower-induction treatment
Correct Answer: Apply an ethephon-based flower-induction treatment
Explanation:
Ethephon releases ethylene, which induces and synchronizes flowering in sufficiently mature pineapple plants, enabling more uniform harvesting.
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33In a pomegranate orchard where irrigation water is scarce during summer but monsoon rainfall is dependable, which flowering season is generally most practical to retain?
Pomegranate
Medium
A.Mrig bahar during June–July
B.Hasta bahar during September–October
C.Ambe bahar during January–February
D.An unrestricted crop in every flowering season
Correct Answer: Mrig bahar during June–July
Explanation:
Mrig bahar uses the June–July flowering period, allowing early crop development to benefit from monsoon moisture when summer irrigation is limited.
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34Pomegranate fruits in an orchard crack frequently near maturity after alternating dry and wet soil conditions. Which practice would most directly reduce the disorder?
Pomegranate
Medium
A.Remove leaves around every fruit to increase sun exposure
B.Increase nitrogen applications during the final ripening stage
C.Use regular irrigation and mulch to stabilize soil moisture
D.Withhold irrigation until visible wilting occurs each time
Correct Answer: Use regular irrigation and mulch to stabilize soil moisture
Explanation:
Irregular water supply causes sudden aril expansion that the rind cannot accommodate. Consistent irrigation and mulching reduce rapid moisture changes and fruit cracking.
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35A grower wants to establish a jackfruit orchard using a superior tree known for regular bearing and high-quality bulbs. Why is grafting preferable to seed propagation?
Jackfruit
Medium
A.It preserves cultivar traits and usually shortens the juvenile period
B.It eliminates the need for a compatible root system
C.It guarantees seedless fruits under all growing conditions
D.It produces greater genetic variation and delays first bearing
Correct Answer: It preserves cultivar traits and usually shortens the juvenile period
Explanation:
Jackfruit seedlings are genetically variable and often take longer to bear. Grafting maintains the selected genotype and generally results in earlier production.
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36Which group of field observations best indicates that a jackfruit has reached harvest maturity?
Jackfruit
Medium
A.Sharp spines, metallic sound, and absence of any aroma
B.Split rind, fermented odor, and complete pulp softening
C.Bright green rind, soft stalk, and rapid latex flow
D.Flattened spines, dull hollow sound, and characteristic aroma
Correct Answer: Flattened spines, dull hollow sound, and characteristic aroma
Explanation:
Mature jackfruit typically has wider or flatter spines, produces a dull hollow sound when tapped, and begins developing its characteristic aroma.
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37A date palm plantation has many healthy female palms but low fruit set because only a few male palms are present. Which practice would most effectively improve fruit set?
Date
Medium
A.Remove female inflorescences to stimulate a second flowering cycle
B.Apply nitrogen fertilizer directly to unopened female spathes
C.Place collected male flower strands within receptive female inflorescences
D.Prune all leaves surrounding the female inflorescences before opening
Correct Answer: Place collected male flower strands within receptive female inflorescences
Explanation:
Date palm is dioecious, so pollen must move from male to female palms. Hand pollination ensures adequate pollen reaches receptive female flowers.
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38A grower needs new date palms that are guaranteed to be female and identical to a high-yielding cultivar. Which planting material is most suitable?
Date
Medium
A.Healthy offshoots produced by selected female palms
B.Seedlings raised from fruits of selected female palms
C.Seedlings obtained after mixing pollen from several males
D.Root pieces collected from mature male palms
Correct Answer: Healthy offshoots produced by selected female palms
Explanation:
Offshoots are vegetative clones of the mother palm, so they preserve both the female sex and the cultivar's desirable characteristics. Seedlings are variable in sex and performance.
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39An unpruned ber orchard develops long, crowded branches and produces fewer marketable fruits. Why would annual pruning improve production?
Ber
Medium
A.Ber forms flower buds exclusively on underground suckers
B.Ber fruits only on permanent trunks older than ten years
C.Ber flowers and fruits mainly on current-season shoots
D.Ber requires complete leaf removal throughout fruit growth
Correct Answer: Ber flowers and fruits mainly on current-season shoots
Explanation:
Annual pruning stimulates new shoots, which carry the season's flowers and fruits. It also improves canopy light penetration and facilitates orchard operations.
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40A nursery wants to propagate a selected ber cultivar using hardy local seedlings as rootstocks. Which technique is most appropriate under active sap flow?
Ber
Medium
A.Divide the trunk into sections and plant them horizontally
B.Sow seeds from the cultivar directly in the orchard
C.Root detached mature leaves in a mist chamber
D.T-bud the selected cultivar onto the seedling rootstocks
Correct Answer: T-bud the selected cultivar onto the seedling rootstocks
Explanation:
T-budding is commonly used for ber when the bark slips readily during active growth. It combines a true-to-type cultivar with the hardiness of seedling rootstocks.
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41A mature guava orchard has abundant old framework branches but few flowers. Leaf analysis shows adequate nutrients, and there is no major pest incidence. Which canopy intervention most directly addresses the crop's bearing habit?
Guava
Hard
A.Head back selected shoots to stimulate new fruitful laterals
B.Retain all old wood and remove only root suckers
C.Thin only the flowers present on scaffold branches
D.Girdle the main trunk before floral differentiation
Correct Answer: Head back selected shoots to stimulate new fruitful laterals
Explanation:
Guava bears mainly on current-season shoots arising from mature wood. Judicious heading back stimulates new laterals capable of flowering.
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42A north Indian guava grower wants to minimize the low-quality rainy-season harvest and concentrate production in winter through bahar regulation. Which strategy is most appropriate?
Guava
Hard
A.Suppress the spring crop by moisture stress, then resume irrigation near the monsoon
B.Suppress monsoon flowering, then restore irrigation only in late winter
C.Irrigate heavily through summer, then impose stress during the monsoon
D.Maintain continuous irrigation and thin fruits immediately before harvest
Correct Answer: Suppress the spring crop by moisture stress, then resume irrigation near the monsoon
Explanation:
Summer moisture stress suppresses or sheds the spring crop. Restoring irrigation around the monsoon induces Mrig bahar, whose fruits mature during the higher-quality winter season.
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43A sapota nursery requires uniform, true-to-type plants suitable for relatively dry soils. Which propagation combination is agronomically most appropriate?
Sapota
Hard
A.Air layering of juvenile shoots on sapota seedlings
B.Hardwood cuttings rooted directly without a rootstock
C.Seed propagation followed by selection after orchard establishment
D.Softwood grafting of selected scions on khirni seedlings
Correct Answer: Softwood grafting of selected scions on khirni seedlings
Explanation:
Selected sapota cultivars are clonally propagated, commonly by softwood grafting or inarching on khirni (Manilkara hexandra), a hardy and compatible rootstock.
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44Sapota fruits of marketable size still release abundant milky latex when scratched and have green tissue beneath the peel. What is the best harvest decision?
Sapota
Hard
A.Harvest immediately because sapota must ripen only after detachment
B.Harvest immediately because fruit size alone indicates full maturity
C.Apply ethephon on the tree and harvest after twenty-four hours
D.Delay harvest because the fruits are still physiologically immature
Correct Answer: Delay harvest because the fruits are still physiologically immature
Explanation:
Mature sapota shows reduced latex, a corky brown surface, and loss of green tissue beneath the peel. Although it ripens after harvest, immature fruit develops poor quality.
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45A grape cultivar produces fruitful buds mainly at nodes 6–10, while its basal buds are consistently sterile. Which pruning system best preserves its yield potential?
Grape
Hard
A.Renewal pruning that removes every one-year-old cane
B.Cane pruning that retains sufficient distal fruitful buds
C.Spur pruning that retains only one or two basal buds
D.Pollarding that retains only permanent scaffold branches
Correct Answer: Cane pruning that retains sufficient distal fruitful buds
Explanation:
When basal buds are unfruitful, short spurs remove the potentially fruitful nodes. Cane pruning retains the middle and distal buds where inflorescences are initiated.
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46In a tropical grape production system using double pruning, which sequence correctly distinguishes foundation pruning from fruit pruning?
Grape
Hard
A.Foundation pruning renews vegetative shoots; later fruit pruning retains buds according to fertility
B.Foundation pruning retains fruiting canes; later fruit pruning removes all one-year wood
C.Foundation pruning removes rootstocks; later fruit pruning renews permanent cordons
D.Foundation pruning is done at bloom; later fruit pruning is done after berry softening
Correct Answer: Foundation pruning renews vegetative shoots; later fruit pruning retains buds according to fertility
Explanation:
Foundation or back pruning after harvest develops healthy canes. Subsequent forward or fruit pruning retains the number of buds required for cropping according to cultivar-specific bud fertility.
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47A seedless grape vineyard needs looser clusters before fruit set and larger berries after fruit set. Which gibberellic acid strategy best matches these objectives?
Grape
Hard
A.Use equal doses during dormancy and immediately after pruning
B.Use a high dose after veraison and a thinning treatment at harvest
C.Use a low dose before bloom and a sizing treatment after fruit set
D.Use a sizing dose before bloom and discontinue treatment after set
Correct Answer: Use a low dose before bloom and a sizing treatment after fruit set
Explanation:
Pre-bloom gibberellic acid promotes rachis elongation and cluster loosening, whereas post-set applications primarily enhance berry enlargement in seedless grapes.
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48A litchi orchard experiences severe fruit cracking following irrigation after a prolonged dry period. Which integrated response most directly addresses the underlying disorder?
Litchi
Hard
A.Remove developing panicles and irrigate heavily only at full colour
B.Impose stronger preharvest stress and apply excess nitrogen near maturity
C.Withhold all irrigation after fruit set and increase potassium chloride
D.Maintain uniform soil moisture, mulch the basin, and correct boron deficiency
Correct Answer: Maintain uniform soil moisture, mulch the basin, and correct boron deficiency
Explanation:
Cracking is intensified when rapid aril expansion follows drought while the pericarp remains inelastic. Uniform moisture, mulching, and correction of boron-related weakness reduce the disorder.
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49A breeder identifies an elite adult litchi tree and wants orchard plants that retain its fruit traits while avoiding a long juvenile phase. Which method is most suitable?
Litchi
Hard
A.Sow open-pollinated seeds and select vigorous seedlings at planting
B.Culture seeds after drying them to a low moisture content
C.Air layer mature shoots and detach them after adequate rooting
D.Root dormant hardwood cuttings without leaves or mist
Correct Answer: Air layer mature shoots and detach them after adequate rooting
Explanation:
Air layering, or gootee, clonally preserves the elite genotype and uses physiologically mature shoots. Seedlings are variable and have a longer juvenile period.
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50A uniform block of adequately mature pineapple plants remains vegetative, threatening synchronized harvesting. Which treatment is most appropriate for inducing uniform flowering?
Pineapple
Hard
A.Apply an ethylene-releasing treatment such as ethephon to the plant whorl
B.Spray auxin on immature crowns to suppress apical dominance
C.Apply cytokinin to harvested slips to initiate inflorescences
D.Apply gibberellic acid to the roots to promote floral initiation
Correct Answer: Apply an ethylene-releasing treatment such as ethephon to the plant whorl
Explanation:
Ethylene or ethylene-releasing compounds induce and synchronize flowering in physiologically mature pineapple plants. Immature plants respond inconsistently.
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51Equal-sized pineapple suckers, slips, and crowns are planted under identical conditions. What is the generally expected order from earliest to latest first harvest?
Pineapple
Hard
A.Crowns, suckers, slips
B.Slips, suckers, crowns
C.Slips, crowns, suckers
D.Suckers, slips, crowns
Correct Answer: Suckers, slips, crowns
Explanation:
Suckers are physiologically more advanced and normally crop first, slips are intermediate, and crowns generally require the longest period to reach flowering and harvest.
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52A pomegranate tree flowers profusely, but most flowers are bell-shaped, short-styled, and shed without setting fruit. Which interpretation is most accurate?
Pomegranate
Hard
A.The crop has an excessive proportion of long-styled female flowers
B.The flowers are cleistogamous and cannot receive external pollen
C.The crop has an excessive proportion of functionally male flowers
D.The flowers are hermaphroditic but lack viable ovules after fertilization
Correct Answer: The crop has an excessive proportion of functionally male flowers
Explanation:
Bell-shaped, short-styled pomegranate flowers are functionally male and normally abscise. Urn-shaped, long-styled hermaphrodite flowers account for most fruit set.
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53Pomegranate fruits crack near maturity after alternating drought and heavy irrigation, but no infectious lesions are visible. Which management change is most appropriate?
Pomegranate
Hard
A.Stabilize soil moisture and ensure adequate boron and calcium nutrition
B.Withhold irrigation permanently once the fruits begin rapid enlargement
C.Increase irrigation fluctuations and apply additional ammoniacal nitrogen
D.Apply a contact fungicide and remove all flowers from the next flush
Correct Answer: Stabilize soil moisture and ensure adequate boron and calcium nutrition
Explanation:
Physiological cracking results from abrupt changes in water availability and weak rind development. Uniform irrigation and balanced boron and calcium nutrition improve rind elasticity.
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54A pomegranate orchard develops oily, water-soaked spots on leaves and fruits; the fruit lesions later enlarge and crack. Which diagnosis best fits this symptom complex?
Pomegranate
Hard
A.Bacterial blight caused by Xanthomonas
B.Anthracnose caused by Colletotrichum
C.Wilt caused by a soilborne disease complex
D.Cercospora leaf spot caused by Cercospora
Correct Answer: Bacterial blight caused by Xanthomonas
Explanation:
Oily or water-soaked lesions followed by cracking are characteristic of pomegranate bacterial blight, commonly associated with Xanthomonas citri pv. punicae.
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55A jackfruit tree produces many male spikes on slender peripheral branches but few female inflorescences. Where should management preserve bearing sites most carefully?
Jackfruit
Hard
A.On thin shoots inside the current flush
B.On the youngest terminal extension shoots
C.On the trunk and older primary branches
D.On root suckers below the graft union
Correct Answer: On the trunk and older primary branches
Explanation:
Jackfruit is monoecious and strongly cauliflorous. Female inflorescences are borne mainly on the trunk and older primary branches, while male spikes are common on younger branches.
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56A nursery must rapidly multiply a superior jackfruit genotype, but stored rootstock seeds show sharply declining germination. Which protocol is most suitable?
Jackfruit
Hard
A.Dry seeds thoroughly and use the resulting seedlings as scions
B.Root mature hardwood scions directly under dry field conditions
C.Store seeds for a year and propagate the cultivar by seed
D.Sow fresh seeds immediately and softwood-graft the selected scion
Correct Answer: Sow fresh seeds immediately and softwood-graft the selected scion
Explanation:
Jackfruit seeds are recalcitrant and rapidly lose viability. Fresh seedlings provide rootstocks, while softwood grafting clonally preserves the superior cultivar.
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57A date plantation is designed with 320 productive female palms. If the operational standard permits no more than 40 female palms per male pollinizer, what is the minimum number of male palms required?
Date
Hard
A.8 male palms
B.10 male palms
C.6 male palms
D.12 male palms
Correct Answer: 8 male palms
Explanation:
The minimum is . Date palm is dioecious, so male palms or an equivalent reliable pollen source are essential for commercial fruit set.
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58A dry-date cultivar is intended for long storage and must be harvested at the fully ripened stage with the lowest moisture content. Which developmental stage is appropriate?
Date
Hard
A.Khalal stage
B.Tamr stage
C.Rutab stage
D.Kimri stage
Correct Answer: Tamr stage
Explanation:
Tamr is the fully ripe, relatively dry stage suited to dry dates and extended storage. Khalal is crisp and mature, while rutab is soft and only partly ripened.
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59An unpruned ber orchard develops dense old wood and progressively fewer fruits despite adequate irrigation and nutrition. Which intervention best exploits the crop's bearing habit?
Ber
Hard
A.Prune annually to stimulate vigorous current-season fruiting shoots
B.Girdle scaffold branches because fruits form on two-year-old wood
C.Retain all shoots because fruits form only on permanent spurs
D.Remove only current-season shoots after they begin flowering
Correct Answer: Prune annually to stimulate vigorous current-season fruiting shoots
Explanation:
Ber bears primarily on current-season growth. Annual pruning renews productive shoots and prevents the canopy from becoming dominated by unproductive old wood.
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60A single-cultivar ber block flowers heavily and has abundant bee activity, yet controlled self-pollination shows poor pollen-tube growth and negligible fruit set. What is the most effective corrective action?
Ber
Hard
A.Apply additional nitrogen to overcome pollen incompatibility
B.Introduce compatible pollinizer cultivars with overlapping bloom
C.Remove all pollinating insects during peak flowering
D.Convert the orchard to a single clone by top-working
Correct Answer: Introduce compatible pollinizer cultivars with overlapping bloom
Explanation:
The evidence indicates self-incompatibility rather than inadequate pollen transfer. Compatible cultivars flowering at the same time provide effective cross-pollen for fruit set.
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