Class 8 Exam  >  Class 8 Notes  >  Very Short Answers - Crop Production and Management, Science, Class 8

Very Short Answers - Crop Production and Management, Science, Class 8 PDF Download

VERY SHORT ANSWER TYPE QUESTIONS
 

Ques 1: How green plants synthesise their own food?
Ans: 
Green plants synthesise their own food by the process of photosynthesis. 

Fig: Green plantsFig: Green plants

Ques 2: Where do animals get their own food?
Ans: 
Animals get their food from plants and other animals.


Ques 3: What do you mean by crop?
Ans: 
When plants of same kind are grown and cultivated at one place on a large scale, it is called crop.


Ques 4: Name two broad cropping patterns.
Ans: 
(i) Kharif crops (ii) Rabi crops.
 

Ques 5:Mention the names of two kharif crops.
Ans:
(i) Paddy crops (ii) Maize crops.

Fig: Paddy fieldsFig: Paddy fieldsQues 6: Write the names of two rabi crops.
Ans:
(i) Wheat crops (ii) Gram crops.
 

Ques 7: What are agricultural practices?
Ans:
The various steps to grow crops and storage of grains are collectively known as agricultural practices.
 

Ques 8: What do you mean by the tilling or ploughing?
Ans: 
The process of loosening and turning of the soil is called tilling or ploughing.
 

Ques 9: What is plough?
Ans:
The device used for tilling or ploughing is called plough.
Fig: PloughFig: Plough

Ques 10: Name two materials used to make a plough.
Ans: 
Wood and iron.
 

Ques 11: What are crumbs?
Ans:
The big pieces of soil are called crumbs.
 

Ques 12: Name some tools used in agriculture.
Ans:
Plough, hoe, cultivator.
 

Ques 13: Write two uses of plough.
Ans:
(i) It is used for tilling of soil.
(ii) It is used to remove the weeds. 


Ques 14: Write two uses of hoe.
Ans: 
(i) It is used to remove the weeds.
(ii) It is used to loosen the soil.
Fig: HoeFig: Hoe

Ques 15: What is traditional tool used for sowing?
Ans:
The tool used traditionally for sowing is funnel-shaped tool.


Ques 16: What is manure?
Ans: 
Manure is an organic substance obtained from the decomposition of plant and animal wastes.
 

Ques 17: What do you mean by manuring?
Ans: 
The process of providing manure to replenish the soil with nutrients is called manuring.
 

Ques 18: What are fertilisers?
 Ans: 
Fertilisers are the chemical substances which are rich in a particular nutrient.


Ques 19: Which is better to use manure or the fertilizers?
Ans: 
Manure is better than the fertilizers.


Ques 20: What do you mean by the term irrigation?
Ans:
The supply of water to crops at different intervals is called irrigation.
 

Ques 21: Is the time and frequency of irrigation same for all the crops?
Ans:
The time and frequency of irrigation varies from crop to crop.
 

Ques 22: Write some sources of irrigation.
Ans:
Wells, tubewells, ponds, rivers and canals are the main sources of irrigation.
 

Ques 23: Mention traditional methods of irrigation.
Ans:
(i) Moat
(ii) Chain pump
(iii) Dhekli
(iv) Rahat.


Ques 24: What is the use of pumps?
Ans: 
Pumps are commonly used for lifting water.
 

Ques 25: What are the modern methods of irrigation?
Ans:
(i) Sprinkler system
(ii) Drip system.
Fig: SprinklersFig: Sprinklers

Ques 26: What are weeds?
Ans:
The unwanted plants growing naturally with the main crop are called weeds.


Ques 27: What is weeding?
Ans: 
The process of removal of weeds is called weeding.
 

Ques 28: What are weedicides?
Ans: 
The chemical substances which are used to control the weeds are called weedicides.
 

Ques 29: Name a weedicide which is commonly used by the farmers.
Ans:
The weedicides commonly used by the farmers are 2, 4‑D.
 

Ques 30: Define harvesting.
Ans: 
The cutting of crop after it is mature is called harvesting.
 

Ques 31: What is threshing?
Ans:
The process by which grains are separated from the chaff is called threshing.
 

Ques 32: Name a machine which is combined harvester and thresher.
Ans:
Combine.
 

Ques 33: What is winnowing?
Ans: 
It is a process of separation of grain and chaff.
Fig: WinnowingFig: Winnowing

Ques 34: Name some harvest festivals.
Ans:
Pongal, Baishakhi, Nabanya, and Bihu are some harvest festivals.
 

Ques 35: What do you mean by storage?
Ans:
The process to keep grains for a longer time by saving them from moisture, insects, rats and microorganisms is called storage.
 

Ques 36: Why is it necessary to dry grains before storage?
Ans:
The grains are properly dried in the sun to reduce the moisture in them. This prevents the attack by insects, pests, fungi and bacteria.  


Ques 37: Name two devices which are used to store grains at large scale.
 Ans:
(i) Silos
(ii) Granaries.
Fig: GranariesFig: Granaries

Ques 38: Name some animals which provide food.
Ans: 
Cow, buffalo, hen, pig and fish, etc.


Ques 39: Name two milk yielding animals.
 Ans:
(i) Cow
(ii) Buffalo.
Fig: Cow: milk yielding animalFig: Cow: milk yielding animal

Ques 40: Mention the name of three animals which provide meat. 

Ans: Goat, pig and fish.


Ques 41: What do you mean by animal husbandry?
Ans:
Animal husbandry is the process to provide  proper food, shelter and care to animals at large scale.


Ques 42: Name a vitamin which is found in cod liver oil.
Ans: 
Vitamin D.

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FAQs on Very Short Answers - Crop Production and Management, Science, Class 8

1. What are the different methods of crop production and management?
Ans. The different methods of crop production and management include ploughing, sowing, irrigation, fertilization, weeding, and harvesting.
2. How does irrigation help in crop production and management?
Ans. Irrigation helps in providing water to crops when there is a shortage of rainfall. It ensures that crops receive enough water for their growth and development.
3. What is the importance of fertilization in crop production and management?
Ans. Fertilization is important in crop production as it provides essential nutrients to the soil, which are necessary for the healthy growth of plants. It helps in improving soil fertility and increasing crop yield.
4. What are the different types of pests that affect crop production and how can they be managed?
Ans. Different types of pests that affect crop production include insects, weeds, and diseases. They can be managed through the use of pesticides, crop rotation, biological control methods, and proper sanitation practices.
5. How does harvesting play a role in crop production and management?
Ans. Harvesting is the process of gathering mature crops from the field. It marks the completion of the crop production cycle and ensures that the crops are collected at the right time to avoid any losses. Proper harvesting techniques help in preserving the quality of the crops and maximizing the yield.
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