Question

Class 8 Science MCQ Questions of Crop Production and Management with Answers?

Answer 1

Class 8 Science MCQ Questions of Crop Production and Management with Answers is accessible here. Students can likewise overhaul with Class 8 Science notes Crop Production and Management to realize their arrangement level. Rehearsing these MCQ questions will assist you with responding to each question that is being posed in the tests. 

MCQ Questions for Class 8 Science with Answers are ready on the premise most recent exam Pattern. At Sarthaks eConnect, you can get to Multiple Choice Questions for Class 8 with Answers of Crop Production and Management. Objective types questions assist the understudies with understanding the ideas altogether and to score great marks.

Practice Class 8 Science MCQ Questions chapterwise 

1. The process of loosening of the soil is called

(a) tilling
(b) harvesting
(c) spraying
(d) weeding

2. 2, 4-D is a 

(a) Insecticide
(b) Weedicide
(c) Fungicide
(d) Rodenticide

3. Seed drill is used for

(a) harvesting
(b) cleaning the seed
(c) sowing
(d) weeding

4. Rabi crop is harvested in

(a) January
(b) March
(c) October
(d) September

5. Maize grows well during

(a) June
(b) January
(c) April
(d) October

6. Tool used for removal of weed is called as________________

(a) Seed drill
(b) Plough
(c) Hoe
(d) Cultivator

7. Transplantation of seedling is done in

(a) coffee
(b) cocoa
(c) rice
(d) mango

8. Compost is a

(a) manure
(b) fertiliser
(c) pesticide
(d) weedicide

9. BHC (Benzene hexachloride) is a

(a) insecticide 
(b) fertiliser
(c) fungicide
(d) pesticides

10. The chemical substances rich in nutrients are called

(a) fertilizer
(b) weedicide
(c) pesticides
(d) herbicides

11. The process of separation of grain from the chaff after harvesting is known as

(a) tilling
(b) Winnowing
(c) spraying
(d) weeding

12. The soil matter formed by decayed organic matter is called

(a) pesticide
(b) fertiliser
(c) humus
(d) biocide

13. Supply of water to crops at appropriate intervals is called

(a) cultivation
(b) irrigation
(c) harvesting
(d) sowing

14. Which instrument is used for spraying weedicides?

(a) Sprayer
(b) Cultivator
(c) Plough
(d) Combine

15. The branch of science that deals with growing plants and raising livestock for human use is

(a) agriculture
(b) horticulture
(c) pisciculture
(d) animal husbandry

16. The growing two or more crops at a time in a field is called as

(a) Crop rotation
(b) Intercropping
(c) Mixed cropping
(d) None of the above

17. Levelling of soil helps to prevent

(a) soil erosion
(b) cultivation
(c) sowing
(d) drought

18. Which of the following is used for tilling the land by cultivator?

(a) Tractor
(b) Bullock
(c) Buffalo
(d) Horse

19. What is NPK?

(a) Fertiliser
(b) Manure
(c) Weedicide
(d) Weed

20. The management of rearing of animals for food and other products is known as

(a) granaries
(b) animal husbandry
(c) poultry
(d) warehouse

21. Rhizobium bacteria fix atmospheric

(a) nitrogen
(c) carbon dioxide
(b) oxygen
(d) hydrogen

22. The sources of irrigation are:

(a) wells
(b) dam
(c) canals
(d) all of these

23. Which of the following plants would have nitrogen-fixing bacteria?

(a) Pea plant
(b) Tomato plant
(c) Cabbage plant
(d) Bottle gourd plant

24. Take a beaker and fill half of it with water. Put some wheat seeds in it, stir it and wait for some time. Which of the following holds true regarding the observation and inference of this experiment?

(a) Healthy seeds being lighter float on the surface of the water
(b) Damaged seeds being lighter float on the surface of the water
(c) Some healthy seeds and some damaged seeds float on the surface of the water
(d) Damaged seeds being heavier settle down at the bottom

25. Which of the following should be used by a farmer with a large farm to harvest his crops quickly and efficiently?

(a) Winnowing machine
(b) Combine
(c) Sickle
(d) Seed drill

Answer 2

1. Answer: (a) tilling

Explanation: The process of loosening and turning of soil is called tilling or ploughing. This is done by using a plough, hoe, or cultivator.

2. Answer:  (b) Weedicide

Explanation: 2, 4-D is a weedicide. 2,4-Dichlorophenoxyacetic acid  is a common systemic herbicide used in the control of broadleaf weeds. It is a synthetic auxin (plant hormone) and one of the most widely used herbicides in the world. 2,4-D is a possible carcinogen per WHO.

2,4-D was one of the ingredients in Agent Orange, a herbicide widely used during the Vietnam War. 2,4-D is primarily used as a selective herbicide which kills many terrestrial and aquatic broadleaf weeds, but not grasses. It acts by mimicking the action of the plant growth hormone auxin, which results in uncontrolled growth and eventually death in susceptible plants.

Weed is a wild plant growing where it is not wanted and in competition with cultivated plants. Weedicide is the chemical which kills weeds.

3. Answer: (c) sowing

Explanation: Nowadays the seed drill is used for sowing with the help of tractors. This tool sows the seeds uniformly at proper distances and depths. 
It ensures that seeds get covered by the soil after sowing. This prevents damage caused by birds. Sowing by using a seed drill saves time and labor.

4. Answer: (b) March

Explanation: The Arabic translation of the word”Rabi” is spring. These crops’ harvesting happens in the springtime hence the name. The Rabi season usually starts in November and lasts up to March or April. Rabi crops are mainly cultivated using irrigation since monsoons are already over by November. In fact, unseasonal showers in November or December can ruin the crops. The seeds are sown at the beginning of autumn, which results in a spring harvest. Wheat, barley, mustard and green peas are some of the major rabi types of crops that grow in India.

5. Answer: (a) June

Explanation: It is a Kharif crop and thus it grows best in the rainy season. In India, the rainy season starts in the month of June and ends in the month of September. Thus, maize is grown from June to September in India.

6. Answer: (c) Hoe

Explanation: A hoe is an ancient and versatile agricultural hand tool used to shape the soil, control weeds, clear soil, and harvest root crops. 

7. Answer: (c) rice

Explanation: Generally, within fifteen to forty typical days following sowing, rice seedlings cultivated are gently removed and replanted into puddled and leveled fields.

8. Answer: (a) manure

Explanation: Compost is a mixture of organic residues (manure, animal carcasses, straw, etc.) .Compost can be applied to agricultural fields as a fertilizer, added to improve soil structure, substituted for peat in horticulture and used as a microbial additive to increase enzyme activities.

9. Answer: (a) insecticide 

Explanation: BHC is a highly toxic, non-specific organochlorine insecticide used mostly for a wide variety of agricultural applications.

10. Answer: (a) fertiliser

Explanation: The chemical substances rich in nutrients are called Fertilisers. ... Substances like urea, ammonium sulphate, potassium chloride, potassium sulphate, NPK (nitrogen, phosphorus, and potassium) etc. are various types of fertilisers used by farmers.

11. Answer: (b) Winnowing

Explanation: Winnowing is a process by which chaff is separated from grain. It can also be used to remove pests from stored grain. Winnowing usually follows threshing in grain preparation.

12. Answer: (c) humus

Explanation: Humification is the process of formation of dark colored humus on the soil. The decomposed organic matter is called as humus.

13. Answer: (b) irrigation

Explanation: The supply of water to crops at regular intervals is called irrigation. The time and frequency of irrigation varies from crop to crop, soil to soil and season to season.

14. Answer: (a) Sprayer

Explanation: A sprayer is an instrument that is used for spraying weedicides.

15. Answer: (a) agriculture

Explanation: The branch of science that deals with growing plants and raising livestock for human use is called agriculture.

Answer 3

16. Answer: (c) Mixed cropping

Explanation: When the same land is used for the cultivation of more than one crop is known as mixed cropping. The same field is divided into smaller regions. The seeds of different crops are sown and cultivation of different crops is carried out in the same piece of land. 

17. Answer: (a) soil erosion

Explanation: Levelling of soil prevents soil erosion because:It prevents the soil from getting blown away by wind or drained off by water. It also prevents collection of water in the fields during irrigation as the soil in uniform and levelled.

18. Answer: (c) Buffalo

Explanation: Buffalo farming is an important occupation for many people in the Indian subcontinent. The buffaloes are especially very suitable for tilling rice fields, and their milk is richer in fat and protein than that of dairy cattle.

19. Answer: (a) Fertiliser

Explanation: A ratio of percentages of the three nutrients—nitrogen, phosphorus, and potassium—that are especially important in a plant fertilizer. 

20. Answer: (b) animal husbandry

Explanation: Animal husbandry is the branch of agriculture concerned with animals that are raised for meat, fiber, milk, eggs, or other products. 

It includes day-to-day care, selective breeding, and the raising of livestock. The breeding, maintenance, and slaughter of these animals, known as animal husbandry. 

It is a component of modern agriculture that has been practiced in many cultures since humanity's transition to farming from hunter-gatherer lifestyles. 

Animal husbandry practices have varied widely across cultures and time periods.

21. Answer: (a) nitrogen

Explanation: Rhizobium–legume symbioses are of great ecological and agronomic importance, due to their ability to fix large amounts of atmospheric nitrogen. These symbioses result in the formation on legume roots of differentiated organs called nodules, in which the bacteria reduce nitrogen into ammonia used by the host plant.

22. Answer: (d) all of these

Explanation: Based on the availability of surface (river) and groundwater, relief, soils, and climatic conditions, different means of irrigation are utilised in India. The conventional means of irrigation include wells, tanks and inundation canals. 

23. Answer: (a) Pea plant

Explanation: Nitrogen fixing bacteria are found in the root nodules of leguminous plants. Pea plant being a legume such bacteria would be found in its roots.

24. Answer: (b) Damaged seeds being lighter float on the surface of water

Explanation: If some wheat seeds are added into a beaker half filled with water, the damaged seeds will float on the surface of water after some time. At the same time, the healthy seeds will settle down at the bottom. This is because the damaged seeds are lighter and healthy seeds are heavier. Thus, the correct answer is 'Damaged seeds being lighter float on the surface of water.

25. Answer: (b) Combine

Explanation: Cutting of the crop close to the ground after it is mature is called harvesting. Farmers with small farms harvest their crops manually using tools like a sickle. However, after harvesting, they need to manually undertake threshing and winnowing. Whereas, farmers with huge farms cannot deploy manual labour for harvesting and threshing as it is more time-consuming. Instead, it is more efficient for them to use machines such as a combine. A combine performs the function of both harvester as well as thresher. This saves a lot of time and manual labor.

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