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