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