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