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