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