Ncert – class 9- science – Chapter 12 – Improvement in Food Resources 1 Welcome to your Ncert - class 9- science - Chapter 12 – Improvement in Food Resources 1 1. Identify the correctly matched pair. Sericulture - Fish Pisciculture - Silk moth Aquaculture - Mosquito Apiculture - Honey bee None 2. Crop rotation is employed for Increasing nitrogen content of soil Community development Checking soil erosion Enhancing soil fertility None 3. Tallness and profuse branching are ideal for Wheat Both B and C Fodder crops Rice None 4. The method of incorporating desirable qualities in crop varieties is.. Crop- rotation Intercropping Hybridisation Multiple cropping None 5. Why is dwarfness preferred in cereal crops? They would consume less minerals They would be resistant to pests They would provide more yield All of the above None 6. Mixed farming involves combination of _____ with crop production. Fishing Rearing of livestock Hunting Bee keeping None 7. _________ is growing of two or more crops simultaneously on the same piece of land in a definite pattern. Intercropping Terrace farming Crop rotation All of the above None 8. What will improve the quantity of food production Pesticides Education and guidance for consumers Optimum use of land for agriculture Synthetic hormones None 9. Berseem and Sudan grass are grown to be used as Manure Green manure Food for livestock Food for humans None 10. Which of the following characteristic can be obtained when quality breeding is done? Higher yields of crop in a shorter period of time Carrying out photosynthesis at night Cropping without irrigation Increased lifespan of crops by 10 years None 11. Which of the following is true for animal husbandry? In addition to supplying milk, meat, eggs, wool and hides, animals, mainly bullocks, are the major source of power for farmers. Both A and B Non of these Animal husbandry is the management and care of farm animals by humans, in which genetic qualities and behaviour, considered to be advantageous to humans, are further developed. None 12. Which of the following methods of cultivation will result in the loss of soil fertility?I.Crop rotationII. Inter-croppingIII. Excessive use of chemical fertilizers I, II and Ill III only I and II only I and III only None 13. Rotation of crops is carried out to Increase variation in the mineral content of soil Increase in nitrogen content of the soil Increase convenience for the farmers Increase diversity of plant habitats None 14. What are genetically modified crops? None of these Plants containing genes that have been introduced into them Plants which are crossed with plants of different genera Plants having superior genes None 15. What is hybridisation? Introduction of new genes into a plant None of the above Fusion between male and female gametes Crossing between genetically dissimilar plants None 16. Which of the following statements are correct regarding mixed cropping? (I) There is a definite pattern of sowing seeds.(ii) It increases biodiversity.(iii) It removes some nutrients specifically.(iv) Outbreaks of pests and diseases can spread very rapidly.(v) The crops with different maturation times are grown together. (vi) Same fertilizers and pesticides are used for all crops.(vii) The risk of total crop failure due to uncertain monsoon is reduced. (i), (ii), (v), (vi) (ii), (v), (vi), (vii) (i), (ii), (iv), (vii) (iii), (iv), (v), (vi) None 17. Which of the following is a food-fodder mixed farming system? Growing crops which can be used as food and fodder by using more fertilizers. Growing food crops alone Growing food crops and fodder crops in the same field Growing fodder crops alone None 18. __________ is the practice of growing a series of different types of crops in the same area in subsequent seasons. Soil erosion Manure farming Crop rotation All of the above None 19. The organic manure is considered better than fertilisers because It is less rich in plant nutrient. It decreases the water holding capacity of the soil. It can be prepared in the factories. It improves the texture of the soil. None 20. Which of the following states has the highest percentage of irrigated land? Punjab Haryana Himachal Pradesh Rajasthan None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
