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) - (a), (ii) - (c), (iii) - (b) (i) -(c), (ii) - (b), (iii) -(a) (i) - (c), (ii) - (a), (iii) - (b) (i) - (b), (ii) - (a), (iii) - (c) None 2. Pick odd one out. Soybean, pea Wheat, gram Mustard, Linseed Paddy, groundnut None 3. Mahesh is a farmer who cultivates sugarcane crop in his field. Which of the following statement is true in this regard? 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 He alternates planting of sugarcane with that of wheat plants. None 4. The pulley, chain pump, dhekli are; Seeds modern tools for irrigation traditional tools for irrigation Fertilizers None 5. Which of the following statements is/are false about manure? It is insoluble in water. It adds large amount of organic matter to soil. It can remove specific nutrient deficiency of soil. It is a natural substance. None 6. Which of the following is not a single-celled microorganism? Fungi, Bacteria Protozoa Some Algae None 7. What is the role of legumes in crop rotation programme? To prevent diseases of crop plants. To prevent water loss from the soil. To increase soil fertility To prevent soil erosion. None 8. The process of removing unwanted plants is called. Sowing Weeding Threshing Tilling None 9. 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 10. 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 Dhekli Moat None 11. 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 help them germinate. To prevent wild animals from attacking the food grains. None 12. How does ploughing help in the process of weeding It dessicates the weeds. It uproots majority of weeds. It cuts down the weeds. It does not provide the weeds with nutrition. None 13. Which system of irrigation includes main pipeline, perpendicular pipes, rotating nozzles and pump Rahat system Drip system Sprinkler system Moat system None 14. Which of the following is not the major group in which microorganisms are classified? Pathogens Fungi Bacteria Protozoa None 15. In crop rotation, growing of crop plants like wheat is alternated with growing of Legumes Weeds Rice Fruits None 16. Why is it essential to provide good care, food and shelter to animals? To provide good honey They provide with good dairy All of these To provide good poultry None 17. Continuous growing of a particular crop in a field without manuring will result in Normal yield Bumper crop High yield Poor yield None 18. 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 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. None 19. Chemical fertilizers may get washed into water bodies through a process called: Sowing Manuring Leaching Broadcasting None 20. Which of the following is not a use of microorganisms? Harvesting of crops Preparation of curd Preparation of bread To increase soil fertility 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.
