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Class 8 Science Crop Production and Management Extra Question Answer

Last updated on June 28th, 2023 at 11:09 pm

Class 8 Crop Production Extra Question Answer


Class 8 Crop Production Extra Question Answer | Crop Production and Management Class 8 Questions and Answers

Fill in the blanks:

  1. The agriculture Revolution or Green Revolution began in India in…….. [ 1960]
  2. …………are crops that are grown for human consumption or animal consumption. [Food crops]
  3. ……….crops are grown in large estates for sale in distant markets.[ Plantation]
  4. ………..Crops Are Those Crops Grown Mostly for Profit, not for the Farmer’s Use. [ Cash ]
  5. …….have funnel-shaped openings that lead to long tubes.[ Seed drills]
  6. Spreading seeds by hand into the soil is called ……….[broadcasting]
  7. ………..are used for storing grains on a large scale.[ Granaries]
  8. Rearing of Honeybees Is Called …………[apiculture]


Answer the following questions:


Q: What is the purpose of food for living organisms?

Food provides energy for their body functions.


Q: How do green plants synthesise their own food?

Green plants synthesise their own food through photosynthesis.


Q: Where do animals, including humans, get their food from?

Animals, including humans, get their food from plants or other animals.


Q: Why is food production needed on a large scale?

Food production needs to be done on a large scale to provide for a large population.


Q: What is agriculture?

Agriculture was born when humans started cultivating land and producing crops.


Q: What is a crop?

A crop refers to plants of the same kind grown in one place on a large scale.


Q: How are crops classified based on their growing season?

Crops can be classified into different types based on the season in which they grow, such as kharif crops grown in the rainy season, and rabi crops grown in the winter season.


Q: What are some agricultural practices involved in crop production?

Agricultural practices include soil preparation, sowing, adding manure and fertilisers, irrigation, weed control, harvesting, and storage.


Q: What does soil preparation involve in agriculture?

Soil preparation involves turning and loosening the soil to allow roots to penetrate easily and breathe.


Q: What do earthworms and microbes in the soil help with?

Earthworms and microbes in the soil help to further turn and loosen the soil and add humus to it.


Q: Why is soil important for plant growth?

Soil contains minerals and nutrients that are essential for plant growth.


Q: How do dead plants and animals contribute to soil fertility?

Dead plants and animals decompose in the soil, releasing nutrients that can be absorbed by plants.


Q: What is the process of turning and loosening the soil called?

Ploughing or tilling is the process of turning and loosening the soil.


Q: Why is levelling the field important for sowing and irrigation?

Levelling the field ensures uniform distribution of water and nutrients.


Q: What is manure and why is it used in agriculture?

Manure is an organic substance obtained from the decomposition of plant or animal wastes and is used to replenish the soil with nutrients.


Q: What are fertilisers and why can their excessive use be harmful?

Fertilisers are chemicals that are rich in a particular nutrient and are produced in factories. Excessive use of fertilisers can make the soil less fertile and contribute to water pollution.


Q: How can soil fertility be maintained in agriculture?

Soil fertility can be maintained by using organic manure or crop rotation to replenish nutrients in the soil. Legumes, which can fix atmospheric nitrogen in the soil, are particularly useful in crop rotation.


Q: What is crop rotation and how does it help replenish the soil with nutrients?

Crop rotation is the practice of growing different crops alternately. It helps replenish the soil with nutrients by reducing the depletion of specific nutrients that occur when the same crop is grown repeatedly.


Q: What are the sources of irrigation?

Sources of irrigation include wells, tubewells, ponds, lakes, rivers, dams, and canals.


Q: What are the traditional and modern methods of irrigation?

Traditional methods of irrigation involve lifting water from wells, lakes, and canals using pumps powered by diesel, biogas, electricity, or solar energy. Modern methods of irrigation include sprinkler and drip systems.


Q: Why is weeding necessary in crop production?

Weeding is necessary to remove undesirable plants called weeds that compete with the crop plants for water, nutrients, space, and light.


Q: What is threshing and how is it done?

Threshing is the process of separating the grain seeds from the chaff. It is carried out using a machine called a combine that is both a harvester and a thresher.


Q: How should farmers handle weedicides to avoid any harmful effects on their health?

Farmers should use weedicides very carefully and cover their nose and mouth with a piece of cloth during spraying to avoid any harmful effects on their health.

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