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