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. Which of the following characteristic can be obtained when quality breeding is done? Higher yields of crop in a shorter period of time Increased lifespan of crops by 10 years Carrying out photosynthesis at night Cropping without irrigation None 2. __________ is the practice of growing a series of different types of crops in the same area in subsequent seasons. Soil erosion Crop rotation All of the above Manure farming None 3. What are genetically modified crops? Plants which are crossed with plants of different genera Plants containing genes that have been introduced into them Plants having superior genes None of these None 4. Tallness and profuse branching are ideal for Rice Both B and C Fodder crops Wheat None 5. Berseem and Sudan grass are grown to be used as Food for humans Green manure Manure Food for livestock None 6. 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 and II only I and III only III only I, II and Ill None 7. The organic manure is considered better than fertilisers because It can be prepared in the factories. It decreases the water holding capacity of the soil. It is less rich in plant nutrient. It improves the texture of the soil. None 8. _________ is growing of two or more crops simultaneously on the same piece of land in a definite pattern. Terrace farming Intercropping Crop rotation All of the above None 9. Why is dwarfness preferred in cereal crops? All of the above They would consume less minerals They would provide more yield They would be resistant to pests None 10. 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) (i), (ii), (iv), (vii) (iii), (iv), (v), (vi) (ii), (v), (vi), (vii) None 11. The method of incorporating desirable qualities in crop varieties is.. Crop- rotation Hybridisation Multiple cropping Intercropping None 12. What is hybridisation? Introduction of new genes into a plant Crossing between genetically dissimilar plants Fusion between male and female gametes None of the above None 13. Which of the following states has the highest percentage of irrigated land? Rajasthan Haryana Himachal Pradesh Punjab None 14. Mixed farming involves combination of _____ with crop production. Rearing of livestock Hunting Fishing Bee keeping None 15. Which of the following is true for animal husbandry? 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. Non of these Both A and B In addition to supplying milk, meat, eggs, wool and hides, animals, mainly bullocks, are the major source of power for farmers. None 16. Rotation of crops is carried out to Increase diversity of plant habitats Increase convenience for the farmers Increase variation in the mineral content of soil Increase in nitrogen content of the soil None 17. What will improve the quantity of food production Optimum use of land for agriculture Pesticides Education and guidance for consumers Synthetic hormones None 18. Which of the following is a food-fodder mixed farming system? Growing food crops and fodder crops in the same field Growing fodder crops alone Growing food crops alone Growing crops which can be used as food and fodder by using more fertilizers. None 19. Crop rotation is employed for Enhancing soil fertility Community development Increasing nitrogen content of soil Checking soil erosion None 20. Identify the correctly matched pair. Sericulture - Fish Pisciculture - Silk moth Apiculture - Honey bee Aquaculture - Mosquito 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.
