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Agriculture and Crops | [ Science Set 15] | UPPSC Prelims PYQ of Last 30 Years |Important Objective Question Answer, MCQ and QUIZ

 1. The most common fertilizer for foliar spraying is 

a) Sodium nitrate

b) Ammonium Chloride

c) Urea

d) D.A.P

Answer. c) Urea;

The most common fertilizer for foliar spraying is a water-soluble fertilizer like Urea, which can be easily absorbed by plant leaves.

2. Humus is an example of 

a) Soil Structure

b) Crystalloids

c) Organic Colloids

d) None of these

Answer. c) Organic Colloids;

Humus is a dark, organic material ( Organic Colloids) that forms as a result of the decomposition of plant and animal matter in the soil. It is rich in nutrients and is a valuable component of fertile soil. Humus improves soil structure, water retention, and nutrient-holding capacity. It also provides a habitat for beneficial microorganisms that help break down organic matter and release nutrients for plants. Adding humus to soil can enhance its fertility and overall health, making it an essential component in agriculture and gardening practices.

3. The most suitable crop for green manuring is

a) Potato

b) Sugarcane

c) Sunhemp

d) Gram

Answer. c) Sunhemp;

Sunhemp is a leguminous plant that is commonly used for green manuring in agriculture. Green manuring involves growing a cover crop, like sunhemp, and then incorporating it into the soil while it's still green and succulent. 

4. Which of the following is not correctly matched?

a) Bluegreen Algae: Paddy

b) Rhizobium Leguminiserum: Peas

c) Azotobacter: Wheat

d) Ajola: Maize

Answer. d) Ajola: Maize;

Blue-Green Algae (Cyanobacteria): Blue-green algae, or cyanobacteria, are photosynthetic microorganisms that can fix atmospheric nitrogen. They form a symbiotic relationship with certain plants, such as some types of rice and ferns. 

Rhizobium leguminosarum: Rhizobium leguminosarum is a type of soil bacterium that forms symbiotic relationships with leguminous plants, such as beans, peas, and clover. These bacteria reside in the root nodules of the host plant and perform nitrogen fixation. They convert atmospheric nitrogen into ammonia, which benefits the host plant.

Azotobacter: Azotobacter is a genus of free-living nitrogen-fixing bacteria that can be found in the soil. These bacteria are not symbiotic like rhizobia but can fix atmospheric nitrogen independently. They contribute to soil fertility by increasing the availability of nitrogen to plants.

Ajola (Azolla):  Azolla can be grown in rice paddies, where it contributes to nitrogen availability for rice plants.

5. Which one of the following is produced through Viticulture

a) Silk

b) Earthworm

c) Honey

d) Grapes

Answer. d) Grapes;

Viticulture is the science and practice of grape cultivation.

6. In Vermiculture, the worm used is

a) Tapeworm

b) Silkworm

c) Threadworm

d) Earthworm

Answer. d) Earthworm;

Vermiculture is the practice of using earthworms to break down organic matter, such as food scraps and other organic waste, into nutrient-rich compost through a process called vermicomposting. Vermiculture is a sustainable and environmentally friendly way to recycle organic waste and produce high-quality compost for gardening and agriculture.

7. What is hydroponics?

a) Growing plants without soil

b) Grafting plant

c) Study of vegetables

d) Soil conservation

Answer. a) Growing plants without soil;

Hydroponics is a method of growing plants without soil, where plants receive all of their nutrients through a nutrient-rich water solution. Instead of relying on soil to provide essential nutrients, hydroponic systems deliver these nutrients directly to the plant roots. This approach has several advantages and is commonly used in modern agriculture and indoor gardening

 8. Heroin is obtained from

a) Indian hemp

b) Opium Poppy

c) Tobacco

d) Areca nut

Answer. b) Opium Poppy;

Heroin is derived from morphine, which is a natural substance found in the opium poppy plant (Papaver somniferum). 

8. Opium is obtained from

a) Dried leaves

b) Roots

c) Latex from unripe fruit

d) Latex from ripe fruit

Answer. c) Latex from unripe fruit;

Opium is obtained from the milky latex or sap of the opium poppy plant.

9. The main constituent of opium is 

a) Morphine

b) Heroin

c) Atropine

d) Quinine

Answer. a) Morphine;

The main constituent of opium is morphine. 

10. Which of the following is a source of bio-fertilizer?

a) Yeast

b) Chlorella

c) Azola

d) Mold

Answer. c) Azola;

Azolla is used as a green manure in rice paddies, where it contributes to nitrogen availability for rice plants.

11. In Which of the following crops, Indigo green algae are mainly used as biofertilizers?

a) Wheat

b) gram

c) Paddy

d) Mustard

Answer. c) Paddy;

12. Blue-green algae is used to supply nitrogen to

a) Bajra

b) Maize

c) Paddy

d) Wheat

Answer. c) Paddy;

13. Azolla is often used as a biofertilizer because it is associated with

a) Blue-green algae

b) Red algae

c) Mold

d) Moss

Answer. a) Blue-green algae;

14. Aqueous fern, which is used as a bio-fertilizer, is

a) Salvinia

b) Azola

c) Marsilia

d) Teridium

Answer. b) Azola

15. Which of the following microorganisms are used as biofertilizers?

a) Cyanobacteria

b) Protozoa

c) Virus

d) Neither of the above

Answer. a) Cyanobacteria;

Cyanobacteria, also known as blue-green algae, can be used as biofertilizers in agriculture. 

16. "Nitrogen Utilization Potential" can be increased in crop production

a) Bye repeated use of fertilizer quantity

b) Using a nitrogen inhibitor

c) By the use of fertilizers which release nitrogen

d) By all of the above

Answer. d) By all of the above

17. Which bacteria is responsible for nitrogen fixation in soybeans?

a) Rhizobium Leguminosarum

b) Rhizobium Japonicum

c) Rhizobium Fajioleai

d) Rhizobium Traitolai

Answer. b) Rhizobium Japonicum;

18. 2, 4 D is

a) An insecticide

b) An explosive

c) A fungicide

d) A Herbicide

Answer. d) A Herbicide;

2,4-D, which stands for 2,4-Dichlorophenoxyacetic acid, is a synthetic herbicide that is widely used in agriculture to control broadleaf weeds and woody plants. 

19. Which of the following crops is covered for price control under the price stabilization fund of the Government of India? ( UPPSC PYQ)

a) Wheat

b) Potato

c) Rice

d) None of the above

Answer. b) Potato.

The Price Stabilization Fund (PSF) in India is a government initiative aimed at stabilizing the prices of agricultural commodities and ensuring remunerative prices to farmers. It was established to address the issue of price volatility in agricultural markets, which can adversely affect both farmers and consumers.

20. Which of the following is not correctly matched? ( UPPSC PYQ)

a) Maize-Tasseling

b) Groundnut -Pegging

c) Chick pea-Tillering

d) Tobacco -Topping

Answer. c) Chick pea-Tillering;

21. Turmeric is an example of an underground stem, known as ( UPPSC PYQ)

a) Bulb

b) Tuber

c) Corm

d) Rhizome

Answer. d) Rhizome

22. Application of Gypsum provides which of the following elements to the plants? ( UPPSC PYQ)

a) Phosphorus

b) Sulphur

c) Magnesium

d) Iron

Answer. b) Sulphur;

Gypsum, a naturally occurring mineral, is primarily composed of calcium sulfate dihydrate (CaSO4·2H2O). 

23. Bolting is related to which crop? ( UPPSC PYQ)

a) Sugarcane

b) Mustard

c) Sugarbeet

d) Barley

Answer. c) Sugarbeet;

"Bolting" is a term commonly associated with the cultivation of certain leafy vegetables.

24. Which one of the following is NOT correctly matched? ( UPPSC PYQ)

        Name of disease                    Related Crop

a) Charcol rot:                       Sugarcane

b) Black rust:                        Barley

c) Bacterial leaf blight:        Paddy

d) Sterility:                         Pigeon Pea

Answer. a) Charcol rot:                       Sugarcane;

25. What is Nutriponics?  ( UPPSC PYQ)

a) Cultivation is soil

b) Cultivation in water

c) Cultivation of nutrients

d) Non of these

Answer. b) Cultivation in water;

26. Roguing is performed to ( UPPSC PYQ)

a) Control disease in plants

b) Control of weeds in crops

c) Removal of plants other than the desired plants

d) None of the above

Answer. c) Removal of plants other than the desired plants;

27. Which of the following is NOT correctly matched? ( UPPSC PYQ) 

        Crop                Disease

a) Potato         -        Late Blight

b) Brinjal        -    Red rot

c) Tomato        -    Early blight

d) Okra            -    Yellow vein mosaic

Answer. b) Brinjal        -    Red rot ( sugarcane);

28. Match List-I with List-II and select the correct answer using the codes given below the lists. (UPPSC PYQ)

         List-I                        List-II

     ( Plants)                ( Propagation Method)

A. Grape                1. Runner

B. Banana               2. Softwood cutting

C. Tea                    3. Hardwood cutting

D. Strawberry        4. Sword sucker


            A    B    C    D

a)         3    2    4    1

b)        3    4    2    1

c)        3    1    4    2

d)        4    3    1    2

Answer. b)        3    4    2    1;

29. Male sterility is used for hybrid seed production in many crops because- ( UPPSC PYQ)

a) It increases heterosis

b) It increases the yield

c) It is a means of genetic emasculation

d) It helps in acclimatization

Answer. a) It increases heterosis;

30. Which of the following is NOT a Kharif season weed? ( UPPSC PYQ)

a) Chenopodium album

b) Amaranthus viridis

c) Echynochloa colonum

d) Commelina Benghalensis

Answer. a) Chenopodium album;

31. Match List-I with List-II and select the correct answer using the codes given below: ( UPPSC PYQ)

            List-I                    List-II

        ( Disease)            ( Treatment)

A. Loose smut of wheat    1. Sulphex

B. Powdery mildew of pea    2. Zinc sulphate

C. Damping off in vegetables    3. Vita vax

D. Khaira    Disease                    4. Soil solarisation


        A    B    C    D

a)     2    1    4    3

b)    3    1    2    4

c)    1    2    3    4

d)    3    1    4    2

Answer. d)    3    1    4    2;

32. ATIC is a component of ( UPPSC PYQ)





Answer. a) NATP;

ATIC- Agriculture Technology Information Center

NATP-National Agricultural Technology Project

33. Litchi Plants are commercially multiplied by (UPPSC PYQ)

a) Seeds

b) Budding

c) Air layering

d) Venner grafting

Answer. c) Air layering;

34. Consider the following statements: ( UPPSC PYQ)

1. Maize is a C4 plant

2. Kranz anatomy present in C4 plant

3. Photorespiration does not occur in C3 plants.

Which of the statements given above is/are correct?

a) Only 1

b) Only 1 and 3

c) Only 2 and 3

d) Only 1 and 2

Answer. d) Only 1 and 2;

35. Which of the following is NOT correctly matched?

            Name of insect            Order

a) House fly                  -        Coleoptera

b) Fruit fly                     -    Diptera

c) Mustard saw fly        -    Hymenoptera

d) Dragonfly -                Odonata

Answer. a) House fly                  -        Coleoptera ( it is Diptera)

36. Fruit fly lays eggs under the skin of which fruit? ( UPPSC PYQ)

a) Okra

b) Brinjal

c) Pumpkin

d) Tomato

Answer. d) Tomato

37. Among the following liming materials, ----- has the highest neutralizing value. (UPPSC PYQ)

a) Basic slag

b) Dolomite

c) Calcium hydroxide

d) Calcium oxide

Answer. d) Calcium oxide

38. Riceyness is a physiological disorder related to which crop? ( UPPSC PYQ)

a) Chili

b) Cauliflower

c) Brinjal

d) Tomato

Answer. b) Cauliflower

39. Consider the following pairs: ( UPPSC PYQ)

    Class of seed:         Colour of Tag

1. Breeder - Golden Yellow

2. Foundation Seed - White

3. Certified seed - Purple

4. T.L seed - Blue

Which of the above pairs are correctly matched?

a) 1 and 2

b) 1 and 3

c) 1 and 4

d) 1, 2,3, and 4

Answer. a) 1 and 2;

40. Match List-I with List-II and select the correct answer using the codes given below the lists.

            List-I                 List-II

A. Indicator crop 1. Berseep

B. Silage crop    2. Sunflower

C. Avenue crop   3. Pigeonpea

D. Ware crop        4. Potato


     A    B    C    D

a) 1    2    3    4

b) 2    1    3    4

c) 4    3    2    1

d) 3    4    2    1

Answer. b) 2    1    3    4;

41. Which method of breeding is NOT appropriate for cross-pollinated crops?

a) Mass selection

b) Back cross method

c) Heterosis breeding

d) Recurrent selection

Answer. d) Recurrent selection;

42. The Silk produced by Spiders is called 

a) Tussar silk

b) Gossamer silk

c) Munga silk

d) Ahimsa silk

Answer. b) Gossamer silk;

Tussar Silk: Tussar silk, also known as "Kosa silk," is a type of silk produced by the silkworm species Antheraea mylitta. It is primarily found in India and some other parts of South Asia. Tussar silk is known for its natural golden or beige color, which gives it a distinct appearance. It is often used to create textured and breathable fabrics, making it suitable for warm climates.

43. Which of the following pair/s is/are correctly matched?

1. Beet -Sugar

2. Honey -Glucose and Fructose

3. Cotton - Cellulose

4. Milk - Lactose

Select the correct answer using the code given below-


a) Only 1,2, and 3

b) Only 2,3, and 4

c) Only 1,2, and 4

d) 1,2,3 and 4

Answer. d) 1,2,3 and 4

44. The "Blue Revolution" in India is related to -

a) Agricultural Production

b) Oil Seeds Production

c) Fish Production

d) Pulse Production

Answer. c) Fish Production

45. Which of the following is the salt-tolerant crop?

a) Muskmelon

b) Pea

c) Cowpea

d) Suagr beet

Answer. a) Muskmelon

46. Photosynthesis is done from the invisible part of sunlight, by some-

a) Trees

b) Fungi

c) bacteria

d) mold

Answer. c) bacteria

47. Which of the following fertilizer release the most acid in the soil?

a) Urea

b) Ammonium Sulfate

c) Ammonium Nitrate

d) Calcium ammonium nitrate

Answer. b) Ammonium Sulfate

48. Urea is

a) A nitrogen-containing organic compound

b) A nitrogen-containing inorganic compound

c) Plant hormones

d) An energy absorbent

Answer. a) A nitrogen-containing organic compound

49. Which of the following chemical fertilizers is relatively more soluble in water at 20 degrees centigrade?

a) Ammonium Sulphate

b) Urea

c) Diammonium Phosphate

d) Ammonium Chloride

Answer. b) Urea

50. The plant receives Nitrogen in the form of

a) Nitric Oxide

b) Nitrate

c) Ammonia

d) Nitride

Answer. b) Nitrate

51. Which among the following is a man-made cereal?

a) Secale Cereal

b) Pomato

c) Triticale

d) None of these

Answer. c) Triticale

52. "Spongy tissue" is such a serious problem due to which the export of the mango species is being adversely affected. It is

a) Alphonso

b) Dashehari

c) Neelum

d) Langra

Answer. a) Alphonso

53. Redness in apples is due to

a) Anthocyanin 

b) Lycopene

c) Carotene

d) Xanthophyll

Answer. a) Anthocyanin ;

54. The red color of the tomato is due to

a) Capsaicin

b) Lycopene

c) Xanthophyll

d) None of these

Answer. b) Lycopene

55. Mushroom used for making juicy vegetables is a

a) Fungus

b) Alga

c) Green Vegetable

d) Flesh of animal

Answer. a) Fungus

56. Noscapine is obtained from

a) Poppy

b) Bail ( Tulsi)

c) Eucalyptus

d) Ephedra

Answer. a) Poppy


57. Match List-I with List-II and select the correct answer using the code given below the lists: ( UPPSC PYQ)

         List-I                List-II

     ( Revolution)       ( Field)

a) Yellow Revolution   1. Milk Production

b) White Revolution   2. Food grains Production

c) Blue Revolution   3. Oil Seeds Production

d) Green Revolution   4. Fish Production


    a    b    c    d

a) 2    4    3    1

b) 3    1    4    2

c) 3    4    2    1

d) 4    2    1    3

Answer. b) 3    1    4    2

58. Monoculture is a typical characteristic of- ( UPPSC PYQ)

a) Shifting cultivation

b) Subsistence farming

c) Specialized horticulture

d) Commercial grain farming

Answer. d) Commercial grain farming

59. Scientific management of Honey bees for commercial production of honey is known as? ( UPPSC PYQ)

a) Sericulture

b) Lac culture

c) Mariculture

d) Apiculture

Answer. d) Apiculture

60.  Bagassosis is due to inhalation of ( UPPSC PYQ)

a) Cotton dust

b) Sugarcane dust

c) Silica dust

d) Coal dust

Answer. b) Sugarcane dust

61. Grassy Shoot disease of sugarcane is caused by ( UPPSC PYQ)

a) Fungi

b) Bacteria

c) Virus

d) Mycoplasma

Answer. b) Bacteria;

Grassy shoot disease, also known as "Sugarcane Grassy Shoot," is a significant viral disease that affects sugarcane plants (Saccharum officinarum). It is caused by a type of phytoplasma, which is a microscopic, cell wall-less bacterium-like organism that can infect plants.

62. For how many crops Minimum Support Price is announced by the Cabinet Committee on Economic Affairs?

a) 18

b) 30

c) 12

d) 22

Answer. d) 22

63. Match the following

List I ( Cultivation of)

A.  Grapes

B.  Fish

C. Silkworms

D.  field crop production and soil management

List II ( Known as)

1. Agronomy

2. Sericulture

3. Pisciculture

4. Viticulture


        A    B    C    D

a)    1    2    3    4

b)    2    1    4    3

c)    2    1    3    4

d)    4    3    2    1

Answer. d)    4    3    2    1


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