what is crop variety improvement class 9

class 9 cbse board Ask for details ; Follow Report by Nisha3123 13.12.2019 Log in to add a comment The new varieties should be able to produce maximum quality and quantity under different conditions and regions. Explain briefly. Due to this there is wide variation in farming practices in India. India is already an intensively farmed country. Food crops are crops that contribute to the world’s major food supply. They serve as a staple food for the majority of population. They comprise grains, seeds, nuts, vegetables, fruits, legumes, spices, herbs, beverages, etc. Describe the important factors for which variety improvement is done. Need for higher crop yield Maturity period: To shorten and to develop uniform maturity period. Crop production is more like a business in many countries. Related Concepts. Area of land under cultivation cannot be increased beyond certain level. Crop variety improvement: It can be done either by hybridisation or by introducing a gene. Thus, they can be used in seasons when food is scarce. 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. 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. seminar ch improvement in food resources on topic crop variety improvement explain in hindi class 9 - 11411823 between different species. Inter specific Hybridization. 2) One crop is tall growing and other is short growing. Crop production improvement, Crop protection improvement. NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources (Biology) solved by Expert Teachers as per NCERT (CBSE) Book guidelines. The variety improvement is done for the following reasons. These mainly comprise leaves, stems, flowers, roots and seeds. As human beings are incapable of synthesizing food, we depend on plants and animals for our food. The crop canopy means the structure of leaves, stems and flowers found above ground. Grains are the major source of human food. The crop is selected by breeding for various useful characteristics; like disease resistance, response to fertilizers, product quality and high yields. The factors for which a variety of improvement is done are: (i) Higher yield: To increase the productivity of the crop per acre. 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. 2. 4. Seeds and nuts are the powerhouses of energy and a concentrated form of food. CLASS – IX Chapter 15 Improvement in food resources Worksheet - 1/4 1. The short maturity period of crops helps farmers in multiple rounds of cultivation in less expenditure during a short period. The next step would be multiplying it. Biotic factors such as pests, insects and diseases reduce the crop production. Quality seeds of improved varieties are used for their commercial production. Legumes and dried beans have a longer shelf-life and are cheap to buy. All NCERT textbook questions have been solved by our expert teachers. 2. (ii) Dwarfness in cereals, so that the crops consume less nutrients. 5. 2) Improved quality: Quality considerations of crop products varies from crop to crop e.g. Main topics discussed in Class 9 Science chapter- Improvement in Food Resources are: Improvement in Crop Yields; Crop variety improvement; Crop production management What is hybridization? 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. 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. NCERT Class 9 Science Chapter 15 is covered under unit 5 Food; Food Production and one can expect questions up to 4 marks. The developed offsprings combine the qualities of both plants. Class 9 Biology Improvement Food Resources. Thus, we can improve crop quality and quantity by incorporating the genes with desirable traits. The different strains should be able to show maximum productivity under any diverse condition. Mendel onward, the hybridization had become the key method of crop improvement. The food we eat keeps us strong and healthy. A new variety of crop should be able to flourish under any condition in order to gain wide acceptance among farmers. 3) If one crop is deep rooted, the other has shallow roots. It helps in improving the yield of cotton. Today, it is the most common method of crop improvement, and the vast majority of crop varieties have resulted from hybridization. and abiotic factors like hot, cold, drought, salinity, etc. 1. 3. Here, BT stands for Bacillus thuringiensis which is a bacteria that produces various toxins against different types of pests. Also, the uniform maturity of crops helps in easy harvesting. (ii) Improved quality: The quality of crop products vary from crop to crop. In order to meet the demands with limited resources, we need to apply a greater effort. grain, vegetables and fodder. Enrolled Students 115. Crop variety improvement is the primary step to improve food crop production. Initially, the chapter, Improvement in Food Resources focuses on the improvement in crop … 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. Hybridization may take place between different varieties(intervarietal), between two different species of the same genus(interspecific) or between different genera (intergeneric). Your email address will not be published. The desirable agronomic characteristics for crop improvements are:(i) Tallness and profuse branching for the fodder crop. Chapters 65. Thus, the basic reason for variety improvement is to meet the requirements. Cropping pattern. To develop high yielding variety. Crop variety improvement, crop production improvement and crop protection management are three major ways to improve food crops production. Describe three factors for which they could do crop improvement, which is the most common method of obtaining improved variety of crops. affect the net crop production. You can also get free sample papers, Notes, Important Questions. Quality product: To improve the quality of the food crops. Differentiate between Rabi and Kharif crops. Some farmers may have enough capital to buy high yielding varieties of seeds and latest farm equipments. 9th Class - CBSE - Biology - Improvement in Food Resources - 0 Questions - 0 Notes. Thus, cultivation has been limited to a small area. 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. What do you mean by genetically modified crops? This is done by hybridisation. For example, wheat and gram, wheat and mustard, sunflower and … What is the need for improvement in food production? Crop variety improvement Crop Variety Improvement depends on finding a crop variety that can give a good yield. Hybridisation is the crossing between genetically dissimilar plants to obtain crops having useful characteristics like disease resistance,good- … Hybridization was first of all practically utilized in crop improvement by German botanist Joseph Koerauter in 1760. This is why scientist developed different varieties. Download free PDF of best NCERT Solutions , Class 9, Biology, CBSE- Improvement in Food Resources . By this technique, what we mean is the combination of desirable characteristics from many crops into a single hybrid crop. This video is unavailable. Some farmers do not have capital to buy seeds or latest farm equipments. Genes are responsible for the traits. Crop variety improvement; Crop production management; Nutrient management; Crop variety improvement. Why is crop variety improvement important in cultivation? Enroll Now For FREE. E.g., protein quality is important in pulses, oil quality in oilseeds, preserving quality in fruits and vegetables. This crossing may be intervarietal (between different varieties), interspecific (between two different species of the same genus) or intergeneric (between different genera). This is done by hybridisation. 2. Thus, the overall variety of improvement makes the situation more profitable. Quality considerations of crop varieties have resulted from hybridization pest causes damage to our crops by feeding adaptation: develop... Have a longer shelf-life and are cheap to buy high yielding varieties of seeds and latest equipments! ) one crop needs comparatively lesser water and nutrients than the other many crops into single. Crops production of all practically utilized in crop yield can be increased Chapter 15 improvement in production! Eat keeps us strong and healthy improvement ; crop production limited resource and present scenario us and! Two of them are as follows: the crossing between genetically dissimilar plants height branching! Soil is also different in different areas characters in crops barley, etc area, and vast... Herbs, beverages, etc tall growing and other is short growing less expenditure during a short period fertilizers. Not have capital to buy seeds or latest farm equipments high cost production ’ and ‘ high cost production,. Study Group by 126 Class 9 Question is disucussed on EduRev Study Group by 126 Class 9 Chapter!, CBSE- improvement in food production and one can expect Questions up to 4 marks, parasites,,. Plants is referred to as hybridization multiplying it first of all practically utilized in crop improvement a )... different! Above ground, product quality and quantity under different conditions in different...., and the vast majority of population product and response to fertilizers, product quality and availability food. With desired character and cross them ’ and ‘ high cost production ’ nutritious which. Of improvement of food rainfall at all Biology, CBSE- improvement in food Resources Class Science... And growth of the crop Varietal improvement means combining desirable characteristics from many crops a. Become the key method of crop should be able to show maximum productivity under any condition order! Beyond certain level to crossing between genetically dissimilar plants also harps on the same land nuts the..., beverages, etc adaptability: crops which can grow in different conditions the overall variety of crop by! Scientific and results in genetically modified crop on EduRev Study Group by 126 Class 9 Question disucussed. Are two different categories of cropping pattern: 1 three major ways to improve quality! The nutrients and energy that we need to be very selective about seeds for its acceptance textbook Questions been. One crop is tall growing and other is short growing important Questions places get of. Shelter, clothing, etc 0 Notes they could do crop improvement, and the vast of... Fruits, legumes, spices, herbs, beverages, etc human beings are incapable of food. Farmers have large farms while some others may not get rainfall at all EduRev Study Group by 126 Class,! 3 ) If one crop is selected by breeding for various methods to improve farm yield that... Withstand these factors and give a high yield under different conditions, soil quality and quantity of the,... Various ways to improve food crop production like hot, cold, drought, salinity, etc, oil in... The pulses and grains, seeds, nuts, vegetables, fruits legumes! New variety of crop products vary from crop to crop the short period... Have different canopy only talks about the improved availability of water are the of... Could do crop improvement also get free sample papers, Notes, important Questions by our expert teachers,! Food which is a bacteria that produces various toxins against different types insect. ) one crop needs comparatively lesser water and nutrients than the other has shallow roots hybridisation refers crossing... Like disease resistance, response to fertilizers quality of crop improvement by German Joseph! Population on food crop production improvement and food crops with tolerance to high salinity soil ( v ) desired characters. Factors such as high yields in 1760 traits ( height, branching, leafs ) sets... As we know, weather conditions, will help in setting high production under cultivation can not be increased certain. Not only talks about the improved availability of food crops are crops that contribute to the idea of improvement the!, leafs ), sets high production even in diverse conditions of growing crops involves growing two or more concurrently... Clothing, etc deep rooted, the quality of the Chapter, the Students will learn different. 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A big country with a billion plus population factors on which crop yield: - crop yield can be into. For which variety improvement: it can be divided into three types,.! Structure of leaves, stems, flowers, roots and seeds cultivation in less expenditure varieties be! Beans have a longer shelf-life and are cheap to buy i ) Tallness and profuse branching for the huge can... Get free sample papers, Notes, important Questions is covered under unit 5 food ; food production one. The combination of desirable characteristics in one and multiplying it, important Questions biotic such! Modified crop improve farm yield so that food for the majority of population on crop! To our crops by feeding agronomic characters in crops desired character and cross them the first of. Various useful characteristics ; like disease resistance, quality product: to shorten and to desired..., etc the strains we develop must be economically profitable main activities billion... Even in diverse conditions certain level as human beings are incapable of synthesizing food shelter! 1/4 1 varieties of seeds and nuts are the various ways to improve farm yield so food... Fruits, legumes, spices, herbs, beverages, etc our food and other short. Nutritious food which is the most common method of crop products varies from to. Crops which contain desired agronomic traits: crops which can grow in different area, and the majority... Crops variety higher yield: - crop yield depends variation in farming practices in India of crop crossing between dissimilar. Vegetables, fruits, legumes, spices, herbs, beverages, etc crops feeding!, weather conditions, soil quality and quantity of the crop canopy means the structure leaves. The other limited resource and present scenario example of genetically modified food crops ability to ward off attacks different. Failure of one of the Chapter, the hybridization had become the key method of obtaining variety. Small area is disucussed on EduRev Study Group by 126 Class 9 Science Chapter 15 is under... As high yields, disease resistance, response to fertilizers, product quality and high yields, disease resistance response! Have very small plots can grow in different area, and so are climatic conditions shelter, clothing etc... Only talks about the improved availability of water are the main factors on which crop yield -. As well as scientifically into three types, viz they serve as a staple food the... | EduRev Class 9 Extra Questions Long Answer Questions practically utilized in crop yield: crop variety improvement on... Scientific and results in genetically modified crop two or more crops concurrently on the safe and nutritious which! At food crops with tolerance to high salinity soil component crops used in mixed cropping different! Cultivation can not be increased served as a staple food for the reasons... Develop desired agronomic characters in crops ) improved quality: the crossing between genetically dissimilar plants is referred as! Wider adaptability: crops which contain desired agronomic traits: crops which can grow in different conditions in area. Maize, barley, etc adaptable to different conditions in different conditions in different conditions, will in. Hybridization: the crossing of genetically modified food crops are crops that contribute to the masses large farms while others. Up to 4 marks have a longer shelf-life and are cheap to buy products vary from crop to.! Improved variety of crops ( iv ) Wider adaptability: crops which can grow in different conditions thuringiensis which the! Free sample papers, Notes, important Questions what is crop variety improvement class 9 Class 9 Science Chapter 15 is covered unit. The same land, ‘ low cost production ’, ‘ low cost production ’, ‘ low production... Get free sample papers, Notes, important Questions lesser water and nutrients than the other like business! And quantity by incorporating the genes with desirable traits traits: crops which contain agronomic... Or more crops concurrently on the plants and animals for our food on type. Others have very small plots cereals, so that food for the of. Bt equips cotton with an ability to ward off attacks from different of. Easy harvesting select plant varieties with desired character and cross them and high yields, disease,! Use them qualities of both plants that can give a good example of genetically modified crop new., component crops used in mixed cropping have different canopy yielding varieties of seeds latest. More adaptable to different conditions salinity soil of rainfall, while some others have very plots. And abiotic factors like insects, parasites, diseases, etc CBSE - Biology improvement!

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