Horticulture Practice Papers

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Practice Papers on Horticulture

1. Tarai soils favour the growth of
(a) Grasses
(b) Coconut
(c) Coffee
(d) Aonla

2. Water table should be below_____at all times of the year for good aeration and adequate drainage
(a) 1 m
(b) 2 m
(c) 1.5 m
(d) 0.8 m

3. Planting distance for citrus is generally
(a) 4.5m x 4.5 m
(b) 6.5m x 6.5m
(c) 4.5m x 5.5m
(d) 5 – 6 m x 5 – 6 m

4. Wind breaks are planted to
(a) Protect orchards from high velocity winds which could cause uprooting of trees, breaking of branches, fruit drop etc
(b) Keep out animals and trespassers and to prevent pilferage
(c) Protect the orchard from hot winds
(d) Provide natural fencing to the orchard

5. Which one of the following is not used as a windbreak
(a) Eucalyptus
(b) Artocarpus hirsute
(c) Opuntia sp
(d) Carissa carandas

6. In a Quincunx planting system, if the distance between the ends of each square is 10 m, then the total plant population for 1 Ha area is
(a) 100
(b) 200
(c) 181
(d) 220

7. Which of the following is also known as ‘Septule System’ of planting
(a) Hexagonal
(b) Square
(c) Rectangular
(d) Quincunx

8. When crops of different height, rooting pattern and duration are grown simultaneously on the same piece of land for efficient utilization of vertical space and trapping of solar radiation, the system of cropping is called as
(a) Ratoon cropping
(b) Relay cropping
(c) Multi-tier cropping
(d) Mixed cropping

9. System of planting fruit trees along with forest trees is known as
(a) Agri-Horti system
(b) Horti-Silvicultural system
(c) Horti-Silvi-Pastoral system
(d) Agri-Hort-Silvicultural system

10. Which of the following physical methods of weeding leaves the lower part of the weed undamaged and hence is not useful for weeding of crops regenerated by roots, tubers, rhizome etc
(a) Digging
(b) Mowing
(c) Cheering
(d) Burning

11. Which of the following chemical weedicide is specifically used for control of weeds with narrow leaves
(a) Metribuzin
(b) 2,4-D
(c) Treflan
(d) Glyphosate

12. Which amongst the following is not a macro-nutrient
(a) Ca
(b) B
(c) Mg
(d) S

13. Single Super Phosphate (SSP) fertilizer contains
(a) 16 % P and 12 % S
(b) 32 % P and 4 % S
(c) 18 % P and 10 % S
(d) 46 % P and 3 % S

14. A hormone used as a herbicide
(a) 2,4-D
(b) IAA
(c) Ethrel
(d) Giberellei acid

15. Micronutrients are generally applied through
(a) Localized placement
(b) Foliar application
(c) Pellet placement
(d) Fertigation

16. Besides fluctuations in temperature, soil and air moisture content, cracking in litchi can also occur due to deficiency of
(a) Z
(b) B and Ca
(c) N
(d) None of these

17. Drip irrigation is more suitable for
(a) Fruit crops
(b) Vegetable crops
(c) Aromatic and medicinal plants
(d) Annual flowers

18. Annual water requirement of onion is
(a) 900 – 1200 mm
(b) 1000 – 1150 mm
(c) 350 – 500 mm
(d) 350 – 550 mm

19. The most preferred system of irrigation in rose is
(a) Sprinkler
(b) Drip irrigation
(c) Bubbler system
(d) All of these

20. To ensure good crop, pineapple should be irrigated during hot months at an interval of
(a) 5 – 10 days
(b) 28 – 30 days
(c) 20 – 25 days
(d) 10 – 15 days

21. Which amongst the following has poor salt tolerance
(a) Avocado
(b) Date palm
(c) Olive
(d) Pomegranate

22. When stamens and carpels of a flower mature at the same time it is known as
(a) Cleistogamy
(b) Homogamy
(c) Allogamy
(d) Dichogamy

23. Acetocarmine test is done to analyse
(a) Photosynthetic rate
(b) Seed viability
(c) Pollen viability
(d) None of these

24. Under north Indian conditions, mango starts flowering during
(a) March – April
(b) Late April
(c) December – January
(d) Late January – early February

25. Which of the following is associated with unfruitfulness
(a) Duodichogamy
(b) Protandry
(c) Monoecy
(d) All of these

26. There is heavy drop of hermaphrodite flowers and young fruits amounting to 99% or more in
(a) Mango
(b) Papaya
(c) Bael
(d) Sapota

27. Translocation of water and nutrients from roots to above ground parts of plants takes place through
(a) Phloem
(b) Xylem
(c) Vascular bundles
(d) Cambium

28. The required dose of 2,4-D for control of pre-harvest drop in Mandarin orange is
(a) 5 ppm
(b) 20 ppm
(c) 10 ppm
(d) 35 ppm

29. Which of the following types of storage works on the principle of evaporative cooling effect of water
(a) Hypobaric Storage
(b) Pit Storage
(c) Zero Energy Cool Chamber
(d) Modified Atmospheric Storage

30. Peak harvesting time of pineapple in Mizoram is
(a) May -June
(b) April – May
(c) November – December
(d) July- August

31. Roses are best harvested
(a) In the evening
(b) At night
(c) In the morning
(d) In the afternoon

32. The established way for evaluating maturity in tomato is
(a) Scale of fruit surface
(b) Astringency
(c) Colour
(d) Waxiness

33. Which of the following is used for harvesting grape bunches
(a) Scissor
(b) Secateur
(c) Sickle
(d) Knife

34. The concentration of salt used for preservation of food is
(a) 15 – 20%
(b) 1 – 2 %
(c) 2 – 5 %
(d) 5 – 10 %

35. The most widely used chemical used for suppressing sprouts in tomato is
(a) Maleic hydrazide (MH)
(b) Benzyl adenine (BA)
(c) Methyl naphthaleneacetic acid (MENA)
(d) 3- chloroisopropyl-N-phenylcarbamate (CIPC)

36. Passion fruit can be properly stored for 3 weeks when stored at
(a) 5.6 – 7.2°C & 85 – 90% RH
(b) 0 – 1.7°C & 75 – 80% RH
(c) 2 – 5°C & 90 -95% RH
(d) 11.5 – 12°C & 85 -90% RH

37. The chemical commonly used for products having natural colours such as anthocynin pigmnet is
(a) Acetic acid
(b) Sorbic acid
(c) KMS
(d) Sodium Benzoate

38. A distinct sound of grains cracking inside when slightly pressed from outside is a good maturity index for
(a) Jackfruit
(b) Banana
(c) Pomegranate
(d) Sapota

39. Which of the following propagation method is used for repairing damaged woods near the collar region
(a) Bridge grafting
(b) Tongue grafting
(c) Cleft grafting
(d) Whip grafting

40. In acid scarification of seeds, seeds are placed in containers and covered with conc.H2SO4 or HCl in the ratio of
(a) 2 parst seed and 1 part acid
(b) 1.5 parst seed and 2 parts acid
(c) 1 part seed and 2 parts acid
(d) 0.5 part seed and 3 parts acid

41. The usual stratification temperature for breaking of seed dormancy is
(a) 0 – 2°C
(b) 8 – 10 °C
(c) 5 – 8 °C
(d) 4 – 7 °C

42. Graft incompatibility occurs because of
(a) Adverse physiological responses between the grafting partners
(b) Virus or phytoplasma transmission
(c) Anatomical abnormalities of vascular tissue in the callus bridge
(d) All of these

43. The introduction of a suitable interstock overcomes the incompatibility of scion and rootstock in
(a) Translocated incompatibility
(b) Delayed incompatibility
(c) Localized incompatibility
(d) Pathogen induced incompatibility

44. The commonly used citrus rootstock for mandarin orange in Mizoram is
(a) Rough lemon
(b) Troyer Citrange
(c) Cleopatra
(d) None of these

45. Which of the following commercial cultivar is a budsport or that has arisen out of bud mutation
(a) Ruby Red of Grapefruit
(b) Allahabad Safeda og Guava
(c) Red Lady of Papaya
(d) Arka Samrat of tomato

46. Clonal propagation in banana is mainly done using
(a) Callus culture
(b) Meristem culture
(c) Cell culture
(d) Embryo culture

47. True Potato Seed (TPS) seed rate is
(a) 250 – 500 g/ Ha
(b) 50 – 100 g/Ha
(c) 100 – 120 g/Ha
(d) None of these

48. The commercial method of propagation in rose is
(a) T-budding
(b) Root cutting
(c) Stem cuttings
(d) All of these

49. Lotus seed germinate after
(a) 50 – 60 days
(b) 150 – 200 days
(c) 200 – 250 days
(d) 20 – 30 days

50. The most preferred period for budding of Mandarin orange in Mizoram is
(a) September
(b) February
(c) August
(d) April