Ncert – class 8- science – Chapter 1: Crop Production and Management 2 Welcome to your Ncert - class 8- science - Chapter 1: Crop Production and Management 2 1. Which of the following is not the major group in which microorganisms are classified? Pathogens Protozoa Bacteria Fungi None 2. What is the role of legumes in crop rotation programme? To prevent water loss from the soil. To prevent diseases of crop plants. To increase soil fertility To prevent soil erosion. None 3. What will be the effect of large amount of moisture present in food grains during storage? The organisms present in the food grains will not be able to grow. It will increase the rate of decay of food materials. The food grains can be stored for a long time. The enzymes present in food grains may dissolve. None 4. The process of removing unwanted plants is called. Threshing Sowing Tilling Weeding None 5. Find the correct match of both the columns:CropsMonths when grown(i)Kharif(a)March to June(ii)Zaid(b)October to March(iii)Rabi(c)June to September (i) - (b), (ii) - (a), (iii) - (c) (i) - (a), (ii) - (c), (iii) - (b) (i) -(c), (ii) - (b), (iii) -(a) (i) - (c), (ii) - (a), (iii) - (b) None 6. Mahesh is a farmer who cultivates sugarcane crop in his field. Which of the following statement is true in this regard? He only plants sugarcane in his field. He plants sugarcane in between rice and wheat plants in his field. He alternates planting of sugarcane with that of rice plants He alternates planting of sugarcane with that of wheat plants. None 7. Which of the following statements is/are false about manure? It is insoluble in water. It can remove specific nutrient deficiency of soil. It adds large amount of organic matter to soil. It is a natural substance. None 8. Which of the following is not a single-celled microorganism? Fungi, Some Algae Protozoa Bacteria None 9. Chemical fertilizers may get washed into water bodies through a process called: Broadcasting Leaching Manuring Sowing None 10. What is the role of legumes in crop rotation programme? To prevent soil erosion To prevent water loss from the soil, To prevent diseases of crop plants To increase soil fertility None 11. Why is it essential to provide good care, food and shelter to animals? To provide good poultry To provide good honey All of these They provide with good dairy None 12. The pulley, chain pump, dhekli are; traditional tools for irrigation modern tools for irrigation Seeds Fertilizers None 13. In crop rotation, growing of crop plants like wheat is alternated with growing of Legumes Weeds Fruits Rice None 14. Continuous growing of a particular crop in a field without manuring will result in Bumper crop Poor yield Normal yield High yield None 15. Why should food grains be stored at temperatures below 30 degree C? To prevent wild animals from attacking the food grains. To prevent evaporation of moisture. To help them germinate. To minimize the damage of food materials. None 16. A particular tribe mostly irrigates their fields by a dipping lift, from temporary wells or from water-holes in rivers. In this form of lift, there is a hollowed tree trunk worked on a fulcrum, with a weight at one end and a bucket or kerosene tin suspended from the other. This raises the water a few feet. Identify the irrigation system used by the tribe. Chain pump Dhekli Moat Rahat None 17. Which of the following is not a use of microorganisms? Harvesting of crops Preparation of curd To increase soil fertility Preparation of bread None 18. Which system of irrigation includes main pipeline, perpendicular pipes, rotating nozzles and pump Moat system Sprinkler system Rahat system Drip system None 19. How does ploughing help in the process of weeding It does not provide the weeds with nutrition. It dessicates the weeds. It uproots majority of weeds. It cuts down the weeds. None 20. Pick odd one out. Paddy, groundnut Soybean, pea Mustard, Linseed Wheat, gram 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.
