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. Why should food grains be stored at temperatures below 30 degree C? To prevent wild animals from attacking the food grains. To prevent evaporation of moisture. To help them germinate. To minimize the damage of food materials. None 2. Chemical fertilizers may get washed into water bodies through a process called: Manuring Broadcasting Sowing Leaching None 3. 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 4. Continuous growing of a particular crop in a field without manuring will result in High yield Bumper crop Poor yield Normal yield None 5. 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 Chain pump Rahat Moat None 6. 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 7. 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 8. Which of the following is not a single-celled microorganism? Some Algae Protozoa Fungi, Bacteria None 9. Which of the following statements is/are false about manure? It is insoluble in water. It can remove specific nutrient deficiency of soil. It is a natural substance. It adds large amount of organic matter to soil. None 10. What will be the effect of large amount of moisture present in food grains during storage? The organisms present in the food grains will not be able to grow. The enzymes present in food grains may dissolve. The food grains can be stored for a long time. It will increase the rate of decay of food materials. None 11. The process of removing unwanted plants is called. Threshing Tilling Weeding Sowing None 12. How does ploughing help in the process of weeding It does not provide the weeds with nutrition. It cuts down the weeds. It dessicates the weeds. It uproots majority of weeds. None 13. Which of the following is not a use of microorganisms? Harvesting of crops Preparation of bread To increase soil fertility Preparation of curd None 14. Find the correct match of both the columns: Crops Months 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) - (b), (ii) - (a), (iii) - (c) (i) - (c), (ii) - (a), (iii) - (b) None 15. In crop rotation, growing of crop plants like wheat is alternated with growing of Legumes Fruits Rice Weeds None 16. What is the role of legumes in crop rotation programme? To prevent soil erosion. To increase soil fertility To prevent water loss from the soil. To prevent diseases of crop plants. None 17. The pulley, chain pump, dhekli are; modern tools for irrigation traditional tools for irrigation Fertilizers Seeds None 18. Pick odd one out. Soybean, pea Mustard, Linseed Paddy, groundnut Wheat, gram None 19. Which of the following is not the major group in which microorganisms are classified? Bacteria Pathogens Protozoa Fungi None 20. Which system of irrigation includes main pipeline, perpendicular pipes, rotating nozzles and pump Drip system Moat system Sprinkler system Rahat system 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 comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
