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 Your email address will not be published.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