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Class 9 Science Chapter 12 Practice Question Answers - Improvement in Food Resources

  1. Give one example of plant source which provides protein.
  2. Give one example of animal source which provides carbohydrates proteins and fats.
  3. When are Kharif crops sown ?
  4. Name the oldest method of crop improvement.
  5. Give one example each of kharif and rabi crops.
  6. What is fertigation?
  7. What is irrigation?
  8. Define the trickle irrigation ?
  9. Name one crop which can tolerate waterlogging in the field and one which cannot.
  10. At what time is irrigation required by all crops ?
  11. Define water logging.
  12. Why we should adopt crop rotation ?
  13. State any two advantages of mixed cropping.
  14. Why are legumes desirable in crop rotation ?
  15. Define intercropping.
  16. Give one example of mixed cropping.
  17. Mention one criterion for selection of the mixed crops.
  18. Mention one advantage of intercropping.
  19. Write two common weeds found in the field. How can weeds be controlled ?
  20. Define pesticide and Herbicide.
  21. Write the two example fungicide.
  22. Write the full form of 2,4-D, MCPA.
  23. Name one seed borne disease.
  24. How do biotic and abiotic factors affect crop production ?
  25. What are the desirable agronomic characteristics for crop improvements ?
  26. What are macro-nutrients and why are they so called ?
  27. Why should preventive measures and biological control methods be preferred for protecting crops ?
  28. What factors may be responsible for losses of grains during storage ?
  29. How does the use of fertilisers improve crop production ?
  30. How do insect-pests attack the crops ?
  31. Write two advantages of using chemical fertilisers over manure.
  32. Though fertilisers increase crop production, they are to be used in limited amount. Why ?
  33. Why is chemical method of controlling pests not considered good ?
  34. What are the various ways of controlling weeds ?
  35. What are the advantages of using manures ?
  36. Why do we irrigate our crops ?
  37. Name the nutrients which plants get from air, water and soil.
  38. Why are kharif crops more susceptible to infestation than the rabi crops ?
  39. How do moisture and temperature affect the life of food materials ?
  40. Why is it necessary to increase the production of crops ?
  41. What are the basic objectives of mixed cropping ?
  42. State any two advantages of mixed cropping.
  43. Compare the use of manures and fertilisers in maintaing soil fertility.
  44. Explain any one method of crop production which ensures high yields.
  45. What are the advantages of intercropping and crop rotation ?
  46. What is genetic manipulation ? How is it useful in agricultural practices ?
  47. How do storage grain losses occur ?
  48. What are the various ways of controlling weeds ?
  49. What are the advantages of using manures ?
  50. Differentiate between fumigation and spraying.
  51. Explain how excessive use of nitrate fertilisers in agricultural fields affect human life.
  52. How does manure differ from chemical fertiliser ? Mention two advantages of using chemical fertilisers over manure ?
The document Class 9 Science Chapter 12 Practice Question Answers - Improvement in Food Resources is a part of the Class 9 Course Science Class 9.
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FAQs on Class 9 Science Chapter 12 Practice Question Answers - Improvement in Food Resources

1. What are the different factors affecting food production?
Ans. There are several factors that affect food production. Some of the key factors include availability of water, quality of soil, climate conditions, availability of seeds and fertilizers, and agricultural practices adopted by farmers. These factors play a crucial role in determining the quantity and quality of food produced.
2. How can we increase food production to meet the growing population?
Ans. To increase food production and meet the growing population, various strategies can be adopted. These include implementing modern agricultural practices such as using high-yielding crop varieties, efficient irrigation techniques, proper pest and disease management, and effective use of fertilizers. Additionally, promoting sustainable farming methods, providing farmers with access to credit and technology, and improving infrastructure can also contribute to increased food production.
3. What are the advantages of organic farming?
Ans. Organic farming has several advantages. Firstly, it promotes the use of natural fertilizers and pesticides, reducing the environmental impact of chemical-based farming. It also helps in maintaining soil fertility and biodiversity. Organic farming practices also result in healthier and safer food products as they are free from chemical residues. Furthermore, organic farming supports rural livelihoods by providing employment opportunities and promotes sustainable agriculture.
4. What is the role of biotechnology in improving food resources?
Ans. Biotechnology plays a significant role in improving food resources. It involves the use of genetic engineering techniques to develop genetically modified crops with desirable traits such as resistance to pests, diseases, and environmental stress. This technology helps in increasing crop yield, improving nutritional content, and reducing post-harvest losses. Biotechnology also contributes to the development of drought-resistant and salt-tolerant crop varieties, which are crucial in combating climate change and ensuring food security.
5. How can food wastage be reduced?
Ans. Food wastage can be reduced through various measures. Firstly, raising awareness about the importance of minimizing wastage can help in changing consumer behavior. Proper storage and preservation techniques can be adopted to extend the shelf life of food. Implementing efficient supply chain management systems can reduce losses during transportation and distribution. Additionally, promoting the concept of "farm-to-fork" can help in reducing wastage by ensuring that food is consumed locally and not wasted in the process of long-distance transportation.
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