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