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 a use of microorganisms? Preparation of curd To increase soil fertility Preparation of bread Harvesting of crops None 2. In crop rotation, growing of crop plants like wheat is alternated with growing of Weeds Fruits Legumes Rice None 3. Which of the following is not the major group in which microorganisms are classified? Pathogens Fungi Protozoa Bacteria None 4. How does ploughing help in the process of weeding It uproots majority of weeds. It cuts down the weeds. It dessicates the weeds. It does not provide the weeds with nutrition. None 5. Pick odd one out. Wheat, gram Soybean, pea Paddy, groundnut Mustard, Linseed None 6. Mahesh is a farmer who cultivates sugarcane crop in his field. Which of the following statement is true in this regard? He alternates planting of sugarcane with that of wheat plants. He plants sugarcane in between rice and wheat plants in his field. He alternates planting of sugarcane with that of rice plants He only plants sugarcane in his field. None 7. Why should food grains be stored at temperatures below 30 degree C? To prevent wild animals from attacking the food grains. To minimize the damage of food materials. To help them germinate. To prevent evaporation of moisture. None 8. What is the role of legumes in crop rotation programme? To prevent soil erosion To prevent diseases of crop plants To prevent water loss from the soil, To increase soil fertility None 9. Which of the following statements is/are false about manure? It can remove specific nutrient deficiency of soil. It adds large amount of organic matter to soil. It is a natural substance. It is insoluble in water. None 10. Which system of irrigation includes main pipeline, perpendicular pipes, rotating nozzles and pump Sprinkler system Moat system Rahat system Drip system None 11. Continuous growing of a particular crop in a field without manuring will result in Poor yield High yield Normal yield Bumper crop None 12. 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. Rahat Chain pump Moat Dhekli None 13. What will be the effect of large amount of moisture present in food grains during storage? 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. The organisms present in the food grains will not be able to grow. None 14. The process of removing unwanted plants is called. Threshing Tilling Sowing Weeding None 15. What is the role of legumes in crop rotation programme? To increase soil fertility To prevent soil erosion. To prevent diseases of crop plants. To prevent water loss from the soil. None 16. Chemical fertilizers may get washed into water bodies through a process called: Manuring Broadcasting Leaching Sowing None 17. The pulley, chain pump, dhekli are; traditional tools for irrigation Seeds Fertilizers modern tools for irrigation None 18. Which of the following is not a single-celled microorganism? Bacteria Protozoa Some Algae Fungi, None 19. 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) -(c), (ii) - (b), (iii) -(a) (i) - (c), (ii) - (a), (iii) - (b) (i) - (b), (ii) - (a), (iii) - (c) (i) - (a), (ii) - (c), (iii) - (b) None 20. 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 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.
