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