Watch Queue Queue. 9th Class Chapter No 15 - Improvement in food resources in Science for CBSE NCERT . It helps in improving the yield of cotton. The country needs more and more food to feed its ever growing population. 3) Improvement in crop yield :- Crop yield can be improved by three main activities. They are served as a staple food for the majority of population. Hence, there is a need for various methods to improve farm yield so that food for the huge population can be made available. Varieties resistant to these factors can improve crop production. Jun 14,2020 - can anyone tell me plzz tha what is crop variety improvement? The Crop varietal improvement: a) ... between different varieties. India is already an intensively farmed country. Area of land under cultivation cannot be increased beyond certain level. 4. This is done by hybridisation. Crop variety improvement: Varietal improvement means combining desirable characteristics in one and multiplying it. Related Concepts. Farming practices among Indian farmers can be divided into three types, viz. The topics that are covered under this chapter include: Improvement in crop yields (1 question) Crop variety improvement (2 questions) Crop production management (3 questions) Crop protection management (3 questions) seminar ch improvement in food resources on topic crop variety improvement explain in hindi class 9 - 11411823 The population explosion has led to a greater demand for basic requirements such as food, shelter, clothing, etc. This is done by hybridisation. affect the net crop production. These include rice, wheat, maize, barley, etc. This crossing may be intervarietal (between different varieties), interspecific (between two different species of the same genus) or intergeneric (between different genera). Class 9 Biology Improvement Food Resources. This definition not only talks about the improved availability of food but also of access of food to the masses. class 9 cbse board Ask for details ; Follow Report by Nisha3123 13.12.2019 Log in to add a comment Some farmers have large farms while some others have very small plots. Crop variety improvement, crop production improvement and crop protection management are three major ways to improve food crops production. Crossing can be of following types: Genetic Modification: When a gene with a desirable character is introduced into a plant or animal, it is called genetic modification. Two of them are as follows: The crossing of genetically dissimilar plants is referred to as hybridization. What is the need for improvement in food production? Crop Variety Improvement. Hybridization was first of all practically utilized in crop improvement by German botanist Joseph Koerauter in 1760. Hence, we need to be very selective about seeds for its acceptance. Production practices show a wide variation among farmers in India. There are three ways: (i) Crop Variety Improvement: This approach aims at finding a crop variety that can give a good yield variety that can produce high yield under different conditions and can withstand different situations like weather changes, soil quality, water availability etc. Improvement in Crop Yield. Maturity period: To shorten and to develop uniform maturity period. Enrolled Students 115. Questions 91636. This video is unavailable. For example, dwarfness in cereals reduces the nutrient consumption without affecting the yield. This method is more scientific and results in genetically modified food crops. Type of soil is also different in different area, and so are climatic conditions. For example, crops with tolerance to high salinity soil. Thus, cultivation has been limited to a small area. E.g., protein quality is important in pulses, oil quality in oilseeds, preserving quality in fruits and vegetables. However, the quality and quantity of the crop produced shouldn’t be compromised due to the limited resource and present scenario. Describe the mechanism of crop variety improvement. Subjects 9. The new varieties should be able to produce maximum quality and quantity under different conditions and regions. Today, it is the most common method of crop improvement, and the vast majority of crop varieties have resulted from hybridization. Oil crops should give quality oil. Food provides us with the nutrients and energy that we need for the proper functioning and growth of the body. Thus, we can improve crop quality and quantity by incorporating the genes with desirable traits. (ii) Improved quality: The quality of crop products vary from crop to crop. Weeds also reduce crop productivity by competing with the main crop for nutrients and light.Similarly, abiotic factors such as temperature, wind, rain, drought, salinity etc. We can raise different strains of food crops with desirable traits naturally as well as scientifically. Crop Variety Improvement. This is why scientist developed different varieties. Herbs have a strong flavour. Food crops are crops that contribute to the world’s major food supply. The food we eat keeps us strong and healthy. (ii) Improved quality: The quality of crop products vary from crop to crop. Watch Queue Queue Resistance: To develop resistance to both living and non-living factors. Crop varieties should be resistant to these stresses, to significantly improve the crop production, g., MUW 318 is a HYV (high yielding variety) of wheat which is released for cultivation in non-tradional areas as Nilgiri and Palini hills and resistant to all the rusts. What is hybridization? 3. Genes are responsible for the traits. A new variety of crop should be able to give high yield under different conditions in different areas. Food Security: According to the 1996 World Food Summit, food security is said to exist when all people, at all times, have physical and economic access to sufficient, safe and nutritious food to meet their dietary needs and food preferences for an active and healthy life. 4) One crop needs comparatively lesser water and nutrients than the other. CBSE Class 9 Science (Biology) Chapter 15 Improvement in Food Resources Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. NCERT Class 9 Science Chapter 15 is covered under unit 5 Food; Food Production and one can expect questions up to 4 marks. What are the various ways to improve the variety of crops? Desirable agronomic characteristics: To develop desired agronomic characters in crops. 6. 2) One crop is tall growing and other is short growing. These include rice, wheat, maize, barley, etc. NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources (Biology) solved by Expert Teachers as per NCERT (CBSE) Book guidelines. In order to meet the demands with limited resources, we need to apply a greater effort. Thus, component crops used in mixed cropping have different canopy. Thus, the strains we develop must be economically profitable. Biotic factors like insects, parasites, diseases, etc. This is generally done by hybridization. The crop is selected by breeding for various useful characteristics; like disease resistance, response to fertilizers, product quality and high yields. Legumes and dried beans have a longer shelf-life and are economical. Considering the pulses and grains, they must have better baking quality. By this technique, what we mean is the combination of desirable characteristics from many crops into a single hybrid crop. Mendel onward, the hybridization had become the key method of crop improvement. Your email address will not be published. Higher yield: Crop variety improvement’s main goal is to increase the productivity of the crop. To develop high yielding variety. Crop production improvement, Crop protection improvement. Your email address will not be published. Also, the uniform maturity of crops helps in easy harvesting. All NCERT textbook questions have been solved by our expert teachers. Some farmers may have enough capital to buy high yielding varieties of seeds and latest farm equipments. Differentiate between Rabi and Kharif crops. For example, wheat and gram, wheat and mustard, sunflower and … Here, BT stands for Bacillus thuringiensis which is a bacteria that produces various toxins against different types of pests. Class 9 Science Chapter 15 Improvement in Food Resources Importance This chapter deals with teaching students about different types of crops and how we can improve their production. Plant Introduction: Plant introduction usually means the introduction of the plants from places … BT cotton is a good example of genetically modified crop. The crop canopy means the structure of leaves, stems and flowers found above ground. You can also get free sample papers, Notes, Important Questions. What are the purposes of crop variety improvement? Cropping pattern. 3) If one crop is deep rooted, the other has shallow roots. Describe three factors for which they could do crop improvement, which is the most common method of obtaining improved variety of crops. E.g., protein quality is important in pulses, oil quality in oilseeds, preserving quality in fruits and vegetables. Another impact of population on food crop production is land exploitation. The crops can be grown even in diverse conditions. Biotic factors such as pests, insects and diseases reduce the crop production. We know resources are very limited, but the demand is very high. Initially, the chapter, Improvement in Food Resources focuses on the improvement in crop … 2. Thus, they can be used in seasons when food i… Seeds and nuts are the powerhouses of energy and a concentrated form of food. Crop variety improvement Crop Variety Improvement depends on finding a crop variety that can give a good yield. 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Legumes and dried beans have a longer shelf-life and are cheap to buy. This helps in a higher yield in less expenditure. What do you mean by genetically modified crops? affect crop production. Introducing the gene from BT equips cotton with an ability to ward off attacks from different types of insect pests. Why is crop variety improvement important in cultivation? 0 Questions - 0 Notes. To know more about crop variety improvement and food crops production, visit BYJU’S website. It involves giving away some insurance against failure of one of the crops. CROP VARIETY IMPROVEMENT - 2. Inter specific Hybridization. Crop variety improvement: It can be done either by hybridisation or by introducing a gene. The factors for which a variety of improvement is done are: (i) Higher yield: To increase the productivity of the crop per acre. Green manure: Some plants like guar are first grown on the cultivating fields and then mulched by ploughing them into the soil before sowing the crop seeds in order to replenish the soil with essential like nitrogen and phosphorus. | EduRev Class 9 Question is disucussed on EduRev Study Group by 126 Class 9 Students. Thus, the overall variety of improvement makes the situation more profitable. and abiotic factors like hot, cold, drought, salinity, etc. Crop Production Management ,Improvement in Food Resources - Get topics notes, Online test, Video lectures, Doubts and Solutions for CBSE Class 9 on TopperLearning. 1. Moreover, this definition also harps on the safe and nutritious food which is affordable to each member of the population. Download free PDF of best NCERT Solutions , Class 9, Biology, CBSE- Improvement in Food Resources . RPS Class - 9 Biology, Ch - 15 factors of crop variety improvement Answer: As we know, weather conditions, soil quality and availability of water are the main factors on which crop yield depends. Hybridisation is the crossing between genetically dissimilar plants to obtain crops having useful characteristics like disease resistance,good- … There are two different categories of cropping pattern: 1. Science NCERT Grade 9, Chapter 15, Improvement in Food Resources as the name suggests, deals with concepts of various techniques of improvement carried out in different aspects of food resources. Major activities for improvement in crop production can be classified into three groups which are as follows: For this purpose, a crop variety is chosen which can give good yield. 5. 6. This video is unavailable. The next step would be multiplying it. Watch Queue Queue India is a big country with a billion plus population. (iv) Wider adaptability : Crops which can grow in different conditions, will help in setting high production. In the first part of the chapter, the students will learn about different types of fertilizers and how to use them. ... Class 10 Class 12. CLASS – IX Chapter 15 Improvement in food resources Worksheet - 1/4 1. Due to this there is wide variation in farming practices in India. Thus, the basic reason for variety improvement is to meet the requirements. Thus, they can be used in seasons when food is scarce. Resistant variety can withstand these factors and give a high yield. These adverse effect on the plants and thus decrease the production. They comprise grains, seeds, nuts, vegetables, fruits, legumes, spices, herbs, beverages, etc. ‘no cost production’, ‘low cost production’ and ‘high cost production’. Main topics discussed in Class 9 Science chapter- Improvement in Food Resources are: Improvement in Crop Yields; Crop variety improvement; Crop production management A pest causes damage to our crops by feeding. The developed offsprings combine the qualities of both plants. Crop improvement by hybridisation: Hybridisation refers to crossing between genetically dissimilar plants. 2. 3. Plant breeders select plant varieties with desired character and cross them. crop variety improvement For this purpose, a crop variety is chosen which can give good yield. Let us have a look at food crops and different methods of crop variety improvement. The desirable agronomic characteristics for crop improvements are:(i) Tallness and profuse branching for the fodder crop. Crop variety improvement is the primary step to improve food crop production. It helps in the development of crops with desired traits such as high yields, disease resistance, quality product and response to fertilizers. Crop production is more like a business in many countries. The crop is selected by breeding for various useful characteristics; like disease resistance, response to fertilizers, product quality and high yields. Question 1. As human beings are incapable of synthesizing food, we depend on plants and animals for our food. Required fields are marked *. These mainly comprise leaves, stems, flowers, roots and seeds. How can crop variety improvement methods help farmers facing repeated crop failure? Food crops are crops that contribute to the world’s major food supply. Q2. 1) Higher yield: The main aim of crop improvement is to improve the productivity of economic produce, e.g. Improvement in Food Resources Class 9 Extra Questions Long Answer Questions. The short maturity period of crops helps farmers in multiple rounds of cultivation in less expenditure during a short period. grain, vegetables and fodder. Adaptation: To develop tolerance and make crops more adaptable to different conditions. Crop variety improvement; Crop production management; Nutrient management; Crop variety improvement. The quality of the crop depends on the type of crop. They are :- i) Crop variety improvement ii) Crop production improvement iii) Crop protection management 4) Crop variety improvement :- Crop variety improvement is done by selecting good varieties of crops. Describe the important factors for which variety improvement is done. between different species. Some places get plenty of rainfall, while some others may not get rainfall at all. Chapters 65. 9th Class - CBSE - Biology - Improvement in Food Resources - 0 Questions - 0 Notes. Grains are the major source of human food. Enroll Now For FREE. This leads to the idea of improvement of food crops variety. Explain briefly. (ii) Dwarfness in cereals, so that the crops consume less nutrients. These varieties are multiplied and supplied to farmers. Cropping pattern. Some farmers do not have capital to buy seeds or latest farm equipments. (v) Desired agronomic traits: Crops which contain desired agronomic traits (height, branching, leafs), sets high production. 2) Improved quality: Quality considerations of crop products varies from crop to crop e.g. This manure is called green manure. Hybridization may take place between different varieties(intervarietal), between two different species of the same genus(interspecific) or between different genera (intergeneric). Quality seeds of improved varieties are used for their commercial production. 2. Mixed cropping: This approach of growing crops involves growing two or more crops concurrently on the same land. Need for higher crop yield Grains are a major source of human food. The variety improvement is done for the following reasons. Quality product: To improve the quality of the food crops. They serve as a staple food for the majority of population. Explain the ways by which crop-production can be increased. A new variety of crop should be able to flourish under any condition in order to gain wide acceptance among farmers. Hybridization: The crossing between genetically dissimilar plants to produce a new variety is called hybridization. Sources of carbohydrate: Wheat, maize, millets, sorghum, etc.Sources of protein: pulses, meat, fish, etc.Sources of fat: Oilseeds, milk, butter, etc.Minerals and vitamins: Vegetables, spices and fruits.Fodder crops: Berseem, oat, sudan grass, etc. They comprise grains, seeds, nuts, vegetables, fruits, legumes, spices, herbs, beverages, etc. The different strains should be able to show maximum productivity under any diverse condition. Or latest farm equipments biotic factors like insects, parasites, diseases,.... The gene from BT equips cotton with an ability to ward off attacks from different types of pests the factors... 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At all main goal is to meet the requirements non-living factors maturity of crops helps in the development crops. Strong and healthy to as hybridization other is short growing in fruits vegetables... Can be made available seasons what is crop variety improvement class 9 food is scarce disucussed on EduRev Study Group by 126 Class Extra! Improvements are: ( i ) Tallness and profuse branching for the fodder crop that give! First part of the food what is crop variety improvement class 9 eat keeps us strong and healthy to both living and non-living.! Onward, the basic reason for variety improvement: a )... between different.... And what is crop variety improvement class 9 setting high production billion plus population, nuts, vegetables, fruits,,! Bacteria that produces various toxins against different types of pests varieties of seeds and are., BT stands for Bacillus thuringiensis which is the primary step to improve the quality the. 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