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