Ncert – class 8- science – Chapter 1: Crop Production and Management 1 Welcome to your Ncert - class 8- science - Chapter 1: Crop Production and Management 1 1. The term used for the process of separation of grains from chaff is threshing winnowing hand picking sieving None 2. Which of the following is not true for fertilisers? They are environment friendly. They increase the yield. Their excessive use disturbs the balance of nutrients in soil. They are generally used in small quantity. None 3. Propagation of ginger is generally done using stem (rhizome) leaf seed root None 4. The method of irrigation in which water is transported through narrow pipes to one or more central locations: Drip irrigation Centre Pivot irrigation Furrow irrigation Sprinkler irrigation None 5. Given below are statements about the harmful effects of weeds on crop plants. They interfere in harvesting.They help crop plants to grow healthily.They compete with crop plants for water, nutrients, space and light.They affect plant growth.Choose the correct combination of statements. (i), (iii), (iv) (iii) only (i), (ii), (iii), (iv) (iii), (iv) None 6. What do we call the structures made of concrete or steel that store water used for irrigation? Canals Tanks Wells Tube well None 7. The process of loosening and turning of soil is called irrigation and manuring digging and winnowing. tilling and ploughing. harvesting and storage. None 8. Read the statements given below. Seeds require moisture for germination.Plants can absorb nutrients mostly in dissolved form.Irrigation protects crops from both frost and hot air currents.Irrigation improves soil texture.Choose the combination of statements which indicate the need to irrigate crops. (i) and (iii) (i), (ii), (iii) (i) and (ii) (i), (ii), (iii), (iv) None 9. Which of the following is not a traditional method of irrigation? Sprinkler system Dhekli system Moat system Rahat system None 10. What is the advantage of turning and loosening of soil before sowing? The colour of the soil particles can be maintained by this process. The nutrients of the top layers can get a chance to go below to facilitate the growth of burrowing animals. This brings the nutrient-rich soil to the top so that plants can use the nutrients present in the lower layer. The nutrients present in the soil can get evaporated by this process. None 11. Which statement is true regarding harvest? The harvest is the celebration for beginning of agricultural activities of a new season. The harvest marks the time that manuring is needed The harvest marks the time that seeds have to be sown in a field. The harvest marks the end of the growing cycle for a particular crop. None 12. The monsoon season in our country is during the month. April to December. November to March. January to May. June to September. None 13. Which is the first agricultural practice followed by farmers while cultivating crops? Protection from weeds Preparation of soil Irrigation Sowing None 14. Identify the correct statement: Hoe and plough are tractor driven whereas cultivator is pulled by animals Cultivator and plough are pulled by animals whereas hoe is tractor driven Hoe and plough are pulled by animals whereas cultivator is tractor driven Cultivator and hoe are pulled by animals whereas plough is tractor driven None 15. Which of the following statements is not true for organic manure? It improves texture of soil. It enhances water holding capacity of soil. It has a balance of all plant nutrients. It provides humus to soil. None 16. How will you compare manures and fertilizers, with respect to their ease of storage and transportation? Both are difficult to store and transport. Both are easy to store and transport. It is easy to store and transport fertilizer but difficult to store and transport manure. It is easy to store and transport manure but difficult to store and transport fertilizer. None 17. The production of fish on a large scale by farming fish culture in fish nurseries is called Dairying Pisciculture Poultry Apiculture None 18. Which of the following tools would a farmer use to remove weeds from the field? Cultivator Plough Hoe Axe None 19. Which oil is obtained from fish? Tallow oil Cod-liver oil Olive oil Corn oil None 20. The system of irrigation wherein water is supplied drop by drop near the roots of plants, is called 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.
