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