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 Your email address will not be published.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