Q16: 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

View Answer

Ans: (a)
Explanation: Agriculture is the broad field that encompasses the cultivation of crops and the rearing of animals for various human purposes.

Q17: Products obtained from the crops are called
(a) yield
(b) produce
(c) crop
(d) fertilisers

View Answer

Ans: (b)
Explanation: The term "produce" refers to the items that are harvested or yielded from cultivated crops.

Q18: The practice of growing two or more dissimilar crops in the same field one after another is
(a) crop rotation
(b) tilling
(c) plantation
(d) weeding

View Answer

Ans: (a)
Explanation: Crop rotation involves the systematic planting of different crops in the same field over time to maintain soil fertility, prevent pest and disease buildup, and optimize yields.

Q19: The unwanted plants that grow along with the crops are called
(a) fertilisers
(b) manure
(c) weeds
(d) kharif crops

View Answer

Ans: (c)
Explanation: Weeds are unwanted plants that compete with cultivated crops for resources like nutrients, water, and sunlight.

Q20: The ideal months for harvesting kharif crop are
(a) June/July
(b) August/September
(c) September/October
(d) November/December

View Answer

Ans: (b)
Explanation: Kharif crops are typically sown during the monsoon season (June-July) and harvested around August-September.

Q21: Which of the following is an example of rabi crop?
(a) Potato
(b) Onion
(c) Jute
(d) Pulses

View Answer

Ans: (a)
Explanation: Rabi crops are winter crops sown around October-November and harvested in the spring. Potato is an example of a rabi crop.

Q22: The method of loosening the soil is called
(a) harvesting
(b) ploughing
(c) levelling
(d) threshing

View Answer

Ans: (b)
Explanation: Ploughing is the process of breaking and loosening the soil using a plough or other tools to prepare it for planting.

Q23: Levelling of soil helps to prevent
(a) soil erosion
(b) cultivation
(c) sowing
(d) drought

View Answer

Ans: (a)
Explanation: Levelling the soil helps to prevent water runoff and soil erosion by promoting uniform water distribution across the field.

Value-Based Questions

Q24: Rajan felt worried about the condition of water scarcity in his village during the cropping season. He went to Ministry of Agriculture and Farmers Welfare of his area to get the solution of this problem. There he came to know about effective method of irrigation and drought resistant varieties of crop.
He requested the head of department of the ministry to arrange some workshop on this topic to educate the farmers in these methods.

Name modern methods of irrigation that help us to use water economically.
What is drought resistant varieties of crop?
Can you name some crops that require less amount of water?
What value of Raj an is shown here?

View Answer

Ans:

Drip irrigation system and sprinkler method.
Crops that need very little amount of rainfall or irrigation to grow are called drought resistant varieties of crop.
Sorghum, pearl millet, chickpea, groundnut, etc.
Rajan is concerned, aware, sensitive and intelligent.

Q25: Krishi Vigyan Kendra (KVK), a constituent extension centre of Tamil Nadu Veterinary and Animal Sciences University, organised a farmer’s workshop on organic farming in vegetable cultivation at Kalayarkoil to commemorate the World Soil Day.
(a) What is organic farming?
(b) What is the advantage of organic farming?
(c) What are the health benefits of organic farming?
(d) What values of KVK are shown here?

View Answer

Ans: (a) Organic farming is a form of agriculture that relies on techniques such as crop rotation, green ma-nure, compost and biological pest control.
(b) Advantages of organic farming are:

Do not use any harmful chemicals
Crops have better taste and nutrition
Eco-friendly
Cost effective

(c) Organic farming uses all the natural ways to provide nutrients and to get rid of the pests. So it reduces the harmful effects of pesticides and fertilisers on human beings.
(d) Krishi Vigyan Kendra shows concern about the growing use of pesticides, fertilisers, etc., and their adverse effect on human health. It is spreading awareness amongst farmers about eco-friendly ways of cultivating crops.

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FAQs on Class 8 Science Chapter 1 Practice Question Answers - Crop Production and Management

1. What are the factors that affect crop production?

Ans. There are several factors that affect crop production, such as availability of water, quality of soil, presence of pests and diseases, availability of sunlight, and proper management practices.

2. How can farmers improve crop production?

Ans. Farmers can improve crop production by adopting various methods such as proper irrigation, using high-quality seeds, following crop rotation, applying fertilizers and pesticides, and practicing proper soil management techniques.

3. What are the different methods of irrigation used in crop production?

Ans. The different methods of irrigation used in crop production include sprinkler irrigation, drip irrigation, flood irrigation, and sub-surface irrigation. Each method has its own advantages and is chosen based on the type of crop and the availability of water.

4. How does crop rotation help in crop production?

Ans. Crop rotation is the practice of growing different crops in a specific sequence on the same piece of land. It helps in improving soil fertility, reducing soil erosion, controlling pests and diseases, and maximizing crop yields.

5. What are the common pests and diseases that affect crop production?

Ans. Common pests that affect crop production include insects like aphids, caterpillars, and beetles, while common diseases include fungal infections, viral infections, and bacterial infections. Regular monitoring and timely application of appropriate pesticides can help prevent and control these pests and diseases.

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