When plants of the same kind are grown and cultivated at one place on a large scale, it is called a crop. This page is prepared by academic team of entrancei for chapter-9 - Reproduction in Animals.Get MCQ based objective questions and HOT Questions with solution for chapter-9 - Reproduction in Animals.Extra Questions for 9 - Reproduction in Animals are with detail solutions. B. tomatoes Answer: Harmful effects caused by the excessive use of fertilizers are-. Answer: Lakhmir Singh Science Solutions Class 8 Chapter 3 Synthetic Fibers And Plastics: View Pdf Question 39. What are the various practices necessary for raising animals for food and Other purposes. Solution: Carbon dioxide is the gas which is mainly responsible for causing global warming. (i) Many people living in the ……….areas consume fish as a major part of their diet. Question 33 B. Arrange the following practices in the correct order as they appear in the sugarcane crop production: Once the soil is ploughed, levelled and manured, it is ready for sowing of seeds. Name any two fertilizers. Here we give Chapter 6 all solution of class 8. 2)Due to force by air and water. C. paddy Class – 8. Question 8. A. chain pump irrigation system Text Book – SCIENCE. In the sprinkler system of irrigation, a main pipeline is laid in the field. This page is prepared by academic team of entrancei for chapter-14 - Chemical Effects of Electric Current.Get MCQ based objective questions and HOT Questions with solution for chapter-14 - Chemical Effects of Electric Current.Extra Questions for 14 - Chemical Effects of Electric Current are with detail solutions. Water is absorbed by the plant roots. A machine called combine is used for harvesting and threshing (Cutting of standing crop and recovering grains). Answer: Give two examples of crops. Some crops like need more water whereas other crops require less water. Name one crop which can tolerate standing water (water-logging) in the field and one which cannot. Question 66 B. The process of transplantation helps to select only healthy seedlings for the cultivation of crops. D. potato the process of removing unwanted plants from a crop field is called? Question 47. Sandy soil is highly porous having highly permeability. What are the advantages of manure ? So, weedicides should be used vary carefully. Lakhmir Singh s Science for Class 8. Harvesting: The cutting and gathering of mature food crop like wheat or paddy is known as harvesting. 1. Question 56. Question 79. C. FCI Question 24. Lakhmir Singh Science Class 8 Solutions: Lakhmir Singh and Manjit Kaur Science Class 8 Solutions free pdf download are available here.S Chand Science Class 8 Solutions are series of books which conforms to the NCERT syllabus. Lakhmir Singh’s Science for Class 8 7. What is the process of ‘transplantation’ in agriculture? What is weeding? It is not very rich in plant nutrients like nitrogen, phosphorus, potassium. Lakhmir Singh Science Solutions Class 8 Chapter 2 Micro-Organisms Friends And Foe: View Pdf. 3)Force. Lakhmir Singh Solutions for Class 8 Science Chapter 1 deals with agricultural practices related to crop production and their management. What are the two types of crops based on seasons ? Farmers adopt many ways to remove weeds and control their growth. Access Lakhmir Singh Science Class 8 Solutions For Chapter 18. (f) irrigation C. meat as well as eggs Answer: D. halogen Fish liver oil is rich in : B and C Rabi crops – The crops grown in winter season are called rabi crops. Question 32. The loosening and turning the soil by ploughing is beneficial because of the following reasons: Question 52 A. C. transportation from the soil are essential. What is the advantage of storing food grains in gunny bags? Text Book – SCIENCE. A student lists the following agricultural practices for crop production: The practice used for cultivating paddy is transplantation. Question 78. Why Answer: Wheat, Paddy, Gram, Maize, Mustard, Cotion, Soyabean, Linseed, Peas, Groundnut Question 20. Name one weedicide. One of the important task in agriculture is to turn the soil and loosen it. Question 82. B. Ignition temperature is different for different substances. Answer: D. paddy (A) Vitamin A Question 16. Answer: Name any one weed found in a crop field. Why do farmers carry out levelling of the ploughed fields? The seeds should be sown at proper spacing. Good quality seeds basically mean the most competent seeds, which will definitely give rise to a healthy plant, which would bear more healthy seeds. Question 65. This page is prepared by academic team of entrancei for chapter-12 - Friction.Get MCQ based objective questions and HOT Questions with solution for chapter-12 - Friction.Extra Questions for 12 - Friction are with detail solutions. D. seeds should not be sown in highly wet Soil Question 71. Answer: Fish liver oil is rich in both vitamin A and vitamin D. This page is prepared by academic team of entrancei for chapter-3 - Synthetic Fibres and Plastics.Get MCQ based objective questions and HOT Questions with solution for chapter-3 - Synthetic Fibres and Plastics.Extra Questions for 3 - Synthetic Fibres and Plastics are with detail solutions. C. wheat There are two types of soil- sandy soil and clayey soil. The nitrogen-fixing bacteria present in root nodules of leguminous plants is rhizobium bacteria. Text Book – SCIENCE. It includes an overview of different crops, their climatic and nutritional necessities and the preparation of soil for the complete development of the crops. (c) nutrients; water Also, visit Lakhmir Singh Solutions for Class 8 Science to get complete solutions for all chapters. Rotation of crops (leguminous and non-leguminous crops) in the same field replenishes the soil with nitrogen naturally and increases the soil fertility. Question 26. This one is: If wheat is sown in the kharif season, it will not grow well as plants cannot tolerate too much water of the rainy season. (d) Damaged seeds would ……….. on top of water. Paddy, tomatoes and chillies are grown by transplantation. Question 85. We get cod liver oil from fish which is rich in vitamin D. Question 14. Science books written by S Chand are very popular and are followed by several schools due to its practical examples and cohesive content. Question 17. B and C These solutions help students in exams as well as their daily homework. State two advantages of the process of transplantation in growing crops. What is ‘animal husbandry’? Name the tool (or implement) used in the traditional harvesting of crops. Best wheat seeds would be ones who’s color, shape and size are normal (not brownish, oddly shaped, tiny or bloated). Answer: Ignition temperature is the lowest temperature at which a substance catches fire. Answer: A. Answer: Page no: 335. D. only D A. chillies How do the irrigation requirements of a wheat crop differ from that of a paddy crop ? A. chain pump system Answer: Question 29 B. pea Winnowing: The process in which grains are separated from chaff with the help of wind is called winnowing. Food grains are stored on a large scale in silos and granaries (gunny bags). Chapter 3 of Lakhmir Singh Science Class 8 Solutions is introduced to give you all the information about man-made fabric and plastic that we use in our day-to-day life. This is the time span in which the child develops into an adult. C. sprinkler irrigation system This will clear students doubts about any question and improve application skills while preparing for board exams. C. seeds should be sown in dry soil Excessive use of fertilizers makes the soil less fertile. All the solutions of Motion - Physics explained in detail by experts to help students prepare for their CBSE exams. Paddy, tomatoes and chillies are grown by transplantation. The crops grown in winter season are called rabi crops. Question 22. Based on seasons, all crops are classified into two main groups: Question 45. Answer: The rainy season in India is generally from June to September. Excessive use of fertilizers causes water pollution. Drip system provides water to plants drop by drop. Answer: (d) float Paddy crop (rice crop) can tolerate standing water in the field whereas crops like wheat, gram cannot. Question 69 A. Lakhmir Singh Class 8 Science Solutions Chapter 3 – Synthetic Fibers and Plastics. A. Answer: All the solutions of Atoms and Molecules - Chemistry explained in detail by experts to help students prepare for their CBSE exams. What will it be known as? B. humus What is meant by rabi crops ? Question 87. Chapter 5 – Coal And Petroleum. Very Short Answer Type Questions . What is done to protect tile grains stored in gunny bags in big go downs from damage ? Class – 8. C. threshing What is meant by kharif crops ? Answer: Sickle: A sickle is a hand-held agricultural tool used for harvesting, or reaping crops (as shown below) Lakhmir Singh Solutions Class 8 Science: Chapter 1 – Crop Production And Management. Combine separates the grains from chaff. Class – 6 (Six). (i) coastal. So, it is called drip system. Also, visit Lakhmir Singh Solutions for Class 8 Science to get complete solutions for all chapters. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Answer: If seeds are placed too close, then plants formed form them will be also too close and will not get enough sunlight, water and nutrients to grow. The text book of Lakhmir Singh And Manjit Kaur for Class 10 Physics gives the students a detailed picture about each and every chapter.This is the best book for your class 10 science preparation. Agricultural practice weeding comes first. Answer: The loose soil allows the roots to breathe easily even when they go deep into the soil. Name an animal food obtained from insect. Question 34. A. chillies A and B (iv) c. Question 93. The soil is prepared for sowing the seeds of crop by ploughing, levelling and manuring. (c) for watering fruit plants ? Nitrogen, phosphorus and potassium are chemical which can be provided to the soil by chemical substance called fertilizers whereas humus cannot. Answer: Advantages of manure: Question 54. Name one crop which can tolerate standing water (water-logging) in the field and one which Answer: Science for Tenth Class (Part 1) PHYSICS 10. Define ignition temperature of a substance. Answer: This system is more useful on the uneven land where sufficient water is not available. In agriculture, broadcasting is used for: The process of transferring the seedlings from the nursery to the main field by hand is called transplanting or transplantation. Give one e ample of each type. Answer: For example, paddy crop requires continuous irrigation whereas wheat crop requires less water. D. papaya Lakhmir Singh Manjit Kaur Class 6 CBSE Science Exercise Solution (1) Food: Where does it come from (2) Components of Food Part-1. C. nitrogen A. nitrogen Name any two implements used for tilling the fields. (i) e Thus, crop cultivated in sandy soil need more frequent irrigation of water. Lakhmir Singh and Manjit Kaur Science solution: Combustion And Flame Chapter 6. Answer: Apart from just the looks, seeds are also tested for their efficiency in germination (how many seeds from set of 100 would grow in plants when sowed). Chapter – 11. Question 44. Thus, the seeds should be sown at right spacing to proper growth. Which of the following crops would enrich the soil with nitrogen? Answer: Which of the following is not grown by transplantation? The other agricultural practices which are done by sickle are: preparing hay and also cutting some crops. When water is allowed to flow through the main pipe under pressure with the help of a pump, it escapes from the rotating nozzles. Name one major food nutrient provided by fish. (a) The same kind of plants grown and cultivated on a large scale at a place is called …………………. The process of transferring the seedlings from the nursery to the main field by hand is called transplanting or transplantation. A. fats Answer: The removal of unwanted plants called weeds is called weeding. D. sowing the seeds The main aim of writing this series is to help students understand difficult scientific concepts in a simple manner in easy language. This helps in proper mixing of manure with soil. What is a fertilizer ? Question 59. Question 40. Important Topics for Lakhmir Singh Solutions for Class 10 Biology Chapter 1. Access Lakhmir Singh Science Class 8 Solutions For Chapter 17. (b) The first step before growing crops is ……._……..of soil. it increases the number of friendly microbes. What is a ‘combine’ which is used in agriculture ? Answer: The chapter mentions synthetic fibres such as Polyester, Nylon, Rayon, and Acrylic. Question 67 B. (a) for uneven land? Question 48. Which agricultural practice is carried out with the help of a sickle? It includes an overview of different crops, their climatic and nutritional necessities and the preparation of soil for the complete development of the crops. Here you get easy solutions of Lakhmir Singh and Manjit Kaur Science solution Chapter 6. Each crop needs a specific amount of water during its various stages of its growth. Answer: About chapters of lakhmir singh science class 8 solutions. Out of drip system and sprinkler system of irrigation, which one is more suitable : The best time for the removal of weeds is before they produce flowers and seeds. 16 Reviews. You are given a sample of wheat seeds. Question 94. Question 41. Answer: (B) Vitamin B The cutting and gathering of mature food crop like wheat or paddy is known as harvesting. (c) Animal excreta, cow-dung, and plant waste Answer: It is a chemical substance which is rich in a particular nutrient. Question 75. What type of organisms grow on stored food grains having higher moisture content? (B) Tomatoes Lakhmir Singh s Science is a series of books which conforms to the NCERT syllabus. Water is important for proper growth and development of flowers, fruits and seeds of plants. Answer: students are advised to check out the complete syllabus.. CBSE Useful Resources. It is the best technique for watering fruit plants, gardens and trees. Answer: Which crop is generally grown between two cereals crops in crop rotation to restore the fertility of soil? B. weeding Lakhmir Singh’s SCIENCE FOR CLASS 8 Lakhmir Singh Manjit Kaur Lakhmir Singh’s Science Class 8 t t. S. CHAND SCHOOL BOOKS (An imprint of S. Chand Publishing) A Division of S. Chand And Company Pvt. Name two traditional methods of irrigation and two modem methods of irrigation. How are weeds removed from the crop fields ? D. drip system Question 53. Question 27. Advantages: Question 38. Class – 8. It does not provide any humus to the soil. A-1, Acharya Nikatan, Mayur Vihar, Phase-1, Central Market, New Delhi-110091. The substances W is a fossil fuel. State two harmful effects caused by the excessive use of fertilizers. Answer: Examples- wheat, gram, etc. Explain how, soil gets affected by the repeated growing of croping the same fields. D. harvesting It is in fact a combined harvester and thresher. B. oxygen Fertilizers help the farmers to get better yield of crops such as wheat, paddy and maize. Lakhmir Singh Solutions For Class 8 Science Chapter 11 Force and Pressure Force is defined as the push or pull experienced by the object because of another object. Question 90. Name three food materials obtained from animals. The practice of transplantation is used in the cultivation of paddy crop and many vegetables like tomatoes and chillies. It gets sprinkled on the crop as if it is raining. Which of the following is not grown by transplantation? For what purpose is a hoe used? It occurs deep below the ground in certain areas of the earth. This is important when you’re dealing with plants at a large scale, and you need to maintain crops for a large​ time frame. Question 11. A. soyabean Answer: The plants of the same kind, when grown at a large scale, is called the crop. Chapter 6 – Combustion And Flame. Question 19. Answer: Answer: These are-. C. potassium For example; … Name one implement used for weeding. Rabi crops – The crops grown in winter season are called rabi crops. Give two examples of rabi crops. with a seed drill? Rotation of crops (leguminous and non-leguminous crops) in the same field replenishes the soil with nitrogen naturally and increases the soil fertility. The main aim of writing this series is to help students understand difficult scientific concepts in a simple manner in easy language. Lakhmir Singh Science Solutions Class 8 Chapter 1 Crop Production And Management: View Pdf. (a) Sprinkler system is more suitable for uneven land where sufficient water is not available. 27. The seeds should not be sown in a dry soil. (iii) Chemical fertilizers Chapter – 01 Answer: The irrigation requirements depend on the nature of crop. Question 13. The process of beating out grains from the harvested wheat crop is called threshing. Lakhmir Singh Class 8 Science Chapter 1 Crop Production and Management Solutions give students an advantage with practical questions. Lakhmir Singh Science Solutions Class 8 Chapter 3 Synthetic Fibers And Plastics: View Pdf In this system, there is a network of narrow pipes with small holes, in the fields. D. linseed C. paddy Answer: Answer: Lakhmir Singh’s SCIENCE FOR CLASS 8 Lakhmir Singh Manjit Kaur Lakhmir Singh’s Science Class 8 t t. S. CHAND SCHOOL BOOKS (An imprint of S. Chand Publishing) A Division of S. Chand And Company Pvt. Answer: A. eggs What is irrigation? (e) Paddy and maize Here we give Chapter 11 all solution of Class 8. The Rhizobium bacteria present in the root nodules of pea plants can fix one of the following from the atmosphere. Question 12. Question 28. 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