what is crop variety improvement class 9

Farming practices among Indian farmers can be divided into three types, viz. Resistance: To develop resistance to both living and non-living factors. affect crop production. Thus, they can be used in seasons when food i… between different species. Herbs have a strong flavour. The new varieties should be able to produce maximum quality and quantity under different conditions and regions. Thus, the strains we develop must be economically profitable. The crops can be grown even in diverse conditions. Some farmers have large farms while some others have very small plots. Some places get plenty of rainfall, while some others may not get rainfall at all. E.g., protein quality is important in pulses, oil quality in oilseeds, preserving quality in fruits and vegetables. For example, wheat and gram, wheat and mustard, sunflower and … Crop variety improvement Crop Variety Improvement depends on finding a crop variety that can give a good yield. and abiotic factors like hot, cold, drought, salinity, etc. These include rice, wheat, maize, barley, etc. The crop canopy means the structure of leaves, stems and flowers found above ground. Thus, cultivation has been limited to a small area. We know resources are very limited, but the demand is very high. Hence, we need to be very selective about seeds for its acceptance. Thus, component crops used in mixed cropping have different canopy. 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. Class 9 Biology Improvement Food Resources. 9th Class - CBSE - Biology - Improvement in Food Resources - 0 Questions - 0 Notes. Crop variety improvement: Varietal improvement means combining desirable characteristics in one and multiplying it. This leads to the idea of improvement of food crops variety. NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources (Biology) solved by Expert Teachers as per NCERT (CBSE) Book guidelines. All NCERT textbook questions have been solved by our expert teachers. seminar ch improvement in food resources on topic crop variety improvement explain in hindi class 9 - 11411823 Crop variety improvement: It can be done either by hybridisation or by introducing a gene. Let us have a look at food crops and different methods of crop variety improvement. Moreover, this definition also harps on the safe and nutritious food which is affordable to each member of the population. Also, the uniform maturity of crops helps in easy harvesting. Chapters 65. We can raise different strains of food crops with desirable traits naturally as well as scientifically. grain, vegetables and fodder. Hence, there is a need for various methods to improve farm yield so that food for the huge population can be made available. 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. Food crops are crops that contribute to the world’s major food supply. | EduRev Class 9 Question is disucussed on EduRev Study Group by 126 Class 9 Students. This is done by hybridisation. (ii) Improved quality: The quality of crop products vary from crop to crop. CLASS – IX Chapter 15 Improvement in food resources Worksheet - 1/4 1. Legumes and dried beans have a longer shelf-life and are economical. 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. Mixed cropping: This approach of growing crops involves growing two or more crops concurrently on the same land. 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. What is hybridization? Grains are a major source of human food. Oil crops should give quality oil. These mainly comprise leaves, stems, flowers, roots and seeds. 3. This manure is called green manure. Answer: As we know, weather conditions, soil quality and availability of water are the main factors on which crop yield depends. India is a big country with a billion plus population. Question 1. For example, crops with tolerance to high salinity soil. Genes are responsible for the traits. Describe the important factors for which variety improvement is done. BT cotton is a good example of genetically modified crop. Varieties resistant to these factors can improve crop production. Plant breeders select plant varieties with desired character and cross them. This is why scientist developed different varieties. Improvement in Crop Yield. 6. This video is unavailable. How can crop variety improvement methods help farmers facing repeated crop failure? To develop high yielding variety. 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) The variety improvement is done for the following reasons. Inter specific Hybridization. 4) One crop needs comparatively lesser water and nutrients than the other. 0 Questions - 0 Notes. Legumes and dried beans have a longer shelf-life and are cheap to buy. Crop Variety Improvement. This is done by hybridisation. Thus, they can be used in seasons when food is scarce. They comprise grains, seeds, nuts, vegetables, fruits, legumes, spices, herbs, beverages, etc. Two of them are as follows: The crossing of genetically dissimilar plants is referred to as hybridization. Here, BT stands for Bacillus thuringiensis which is a bacteria that produces various toxins against different types of pests. Main topics discussed in Class 9 Science chapter- Improvement in Food Resources are: Improvement in Crop Yields; Crop variety improvement; Crop production management Crop production improvement, Crop protection improvement. Enroll Now For FREE. Why is crop variety improvement important in cultivation? This method is more scientific and results in genetically modified food crops. What are the various ways to improve the variety of crops? Quality seeds of improved varieties are used for their commercial production. Cropping pattern. Plant Introduction: Plant introduction usually means the introduction of the plants from places … Crop variety improvement; Crop production management; Nutrient management; Crop variety improvement. Mendel onward, the hybridization had become the key method of crop improvement. 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. 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. You can also get free sample papers, Notes, Important Questions. Grains are the major source of human food. There are two different categories of cropping pattern: 1. This definition not only talks about the improved availability of food but also of access of food to the masses. Maturity period: To shorten and to develop uniform maturity period. What is the need for improvement in food production? 3) If one crop is deep rooted, the other has shallow roots. This helps in a higher yield in less expenditure. A new variety of crop should be able to flourish under any condition in order to gain wide acceptance among farmers. These include rice, wheat, maize, barley, etc. Watch Queue Queue Today, it is the most common method of crop improvement, and the vast majority of crop varieties have resulted from hybridization. Higher yield: Crop variety improvement’s main goal is to increase the productivity of the crop. 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 10 Class 12. Crop variety improvement is the primary step to improve food crop production. Your email address will not be published. class 9 cbse board Ask for details ; Follow Report by Nisha3123 13.12.2019 Log in to add a comment Thus, we can improve crop quality and quantity by incorporating the genes with desirable traits. 1) Higher yield: The main aim of crop improvement is to improve the productivity of economic produce, e.g. Enrolled Students 115. Crop production is more like a business in many countries. Hybridization may take place between different varieties(intervarietal), between two different species of the same genus(interspecific) or between different genera (intergeneric). This crossing may be intervarietal (between different varieties), interspecific (between two different species of the same genus) or intergeneric (between different genera). 6. Hybridization was first of all practically utilized in crop improvement by German botanist Joseph Koerauter in 1760. 4. The next step would be multiplying it. 3) Improvement in crop yield :- Crop yield can be improved by three main activities. 3. The country needs more and more food to feed its ever growing population. India is already an intensively farmed country. The quality of the crop depends on the type of crop. Need for higher crop yield 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. Quality product: To improve the quality of the food crops. (iv) Wider adaptability : Crops which can grow in different conditions, will help in setting high 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. They are served as a staple food for the majority of population. Hybridisation is the crossing between genetically dissimilar plants to obtain crops having useful characteristics like disease resistance,good- … What do you mean by genetically modified crops? Area of land under cultivation cannot be increased beyond certain level. 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. 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