Tiêu đề Class 09 Science Chapter 15 Improvement in Food Resources.pdf ✅

Improvement in Food Resources DPP-01 [Topic: Improvement in Crop Yields] Very Short Answer Type Questions 1. Name one oil yielding crop. 2. Which one is not a source of carbohydrate? (a) Rice (b) Millets (c) Sorghum (d) Gram 3. Find out the wrong statement from the following: (a) White revolution is meant for increase in milk production (b) Blue revolution is meant for increase in fish production (c) Increasing food production without compromising with environmental quality is called as sustainable agriculture (d) None of the above 4. To solve the food problem of the country, which among the following is necessary? (a) Increased production and storage of food grains (b) Easy access of people to the food grains (c) People should have money to purchase the grains (d) All of the above 5. Find out the correct sentence (i) Hybridisation means crossing between genetically dissimilar plants (ii) Crossing between two varieties is called as inter specific hybridization (iii) Introducing of genes for a desired character into a plant gives genetically modified crop (iv) Cross between plants of two species is called as inter varietal hybridisation (a) (i) and (iii) (b) (ii) and (iv) (c) (ii) and (iii) (d) (iii) and (iv) 6. Name two fodder crops. 7. What is the time of rabi crops? 8. There was a bumper increase in crop production of food grains especially wheat in 1970. What was the name of this revolution? 9. What is yellow revolution? 10. Give one example each of Kharif and Rabi crop. 11. What are photoperiods? 12. What is meant by inter-specific crossing?
13. What is inter-generic crossing? 14. Why do we need food? 15. What is the main source of irrigation in India? 16. What is HYV? Short Answer Type Questions-I 17. How do biotic and abiotic factors affects crop production? 18. Fill in the blanks (a) Pigeon pea is a good source of ________ (b) Berseem is an important ________crop. (c) The crops which are grown in rainy season are called ________crops. (d) ________are rich in vitamins. (e) ________crops grow in winter season. 19. What is GM crop? Name any one such crop which is grown in India. 20. Name some pulses which provides us proteins. 21. What is a Kharif season? Name few Kharif crops. 22. What are the desirable agronomic characteristics of crop production? 23. Shorter the duration between sowing and harvesting, the more economical is the variety Give reason. 24. Efforts are always being made to improve production from agriculture and animal husbandry. Why is this necessary? OR Why we cannot make do with the current levels of production? 25. 'Simply increasing grain production for storage in warehouses cannot solve the problem of malnutrition and hunger'. Discuss what should be done in order to save the food crisis in India? 26. In India there has been a four times increase in the production of food grains from 1952 to 2010 with only 25% increase in the cultivable land area. How has this increase in production been achieved? Short Answer Type Questions-II 27. Explain any one method of crop production which ensures high yield. 28. What do we get from cereals, pulses, fruits and vegetables? 29. What is sustainable agriculture? Why it should be practiced now that already we are able to achieve higher rates of food production in agriculture and animal husbandry? Long Answer Type Question 30. List five objectives of Crop variety improvement.
Improvement in Food Resources DPP-02 [Topic: Crop Production Management] Very Short Answer Type Questions 1. Weeds affect the crop plants by (a) killing the plants in the field before they grow (b) dominating the plants to grow (c) competing for various resources of crops (plants) causing low availability of nutrients (d) All of the above. 2. Find out the correct sentence about manure (i) Manure contains large quantities of organic matter and small quantities of nutrients. (ii) It increases the water holding capacity of sandy soil. (iii) It helps in draining out of excess water from the clayey soil. (iv) Its excessive use pollutes the environment because it is made of animal excretory waste. (a) (i) and ( iii ) (b) (i) and (ii) (c) (ii) and (iii) (d) (iii) and (iv) 3. Preventive and control measures adopted for the storage of grains include (a) strict cleaning (b) proper disjoining (c) fumigation (d) all of the above 4. Which one of the following nutrients is not available in fertilisers? (a) Nitrogen (b) Phosphorus (c) Iron (d) Potassium 5. List the purposes for which cattle are raised. 6. Name some exotic breeds of cattle Short Answer Type Questions-I 7. Why is organic matter important for crop production? 8. If there is low rainfall in a village throughout the year, what measures will you suggest tothe farmers for better cropping? 9. Arrange these statements in correct sequence for the preparation of green manure. (a) Green plants are decomposed in the soil. (b) Green plants are cultivated for preparing manure or crop plant parts are used.