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