(v) Desired agronomic traits: Crops which contain desired agronomic traits (height, branching, leafs), sets high production. 1. 2) Improved quality: Quality considerations of crop products varies from crop to crop e.g. Required fields are marked *. Cropping pattern. The crops can be grown even in diverse conditions. Hybridisation is the crossing between genetically dissimilar plants to obtain crops having useful characteristics like disease resistance,good- … Thus, they can be used in seasons when food i… The crop is selected by breeding for various useful characteristics; like disease resistance, response to fertilizers, product quality and high yields. Varieties resistant to these factors can improve crop production. Hybridization was first of all practically utilized in crop improvement by German botanist Joseph Koerauter in 1760. Farming practices among Indian farmers can be divided into three types, viz. and abiotic factors like hot, cold, drought, salinity, etc. The food we eat keeps us strong and healthy. Why is crop variety improvement important in cultivation? Some farmers do not have capital to buy seeds or latest farm equipments. 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Crop variety improvement: It can be done either by hybridisation or by introducing a gene. By this technique, what we mean is the combination of desirable characteristics from many crops into a single hybrid crop. What do you mean by genetically modified crops? Watch Queue Queue. Type of soil is also different in different area, and so are climatic conditions. Let us have a look at food crops and different methods of crop variety improvement. NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources (Biology) solved by Expert Teachers as per NCERT (CBSE) Book guidelines. This is generally done by hybridization. You can also get free sample papers, Notes, Important Questions. What is hybridization? Describe the important factors for which variety improvement is done. Some places get plenty of rainfall, while some others may not get rainfall at all. This definition not only talks about the improved availability of food but also of access of food to the masses. These include rice, wheat, maize, barley, etc. As human beings are incapable of synthesizing food, we depend on plants and animals for our food. Your email address will not be published. Watch Queue Queue 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. Another impact of population on food crop production is land exploitation. crop variety improvement For this purpose, a crop variety is chosen which can give good yield. Thus, the strains we develop must be economically profitable. A new variety of crop should be able to flourish under any condition in order to gain wide acceptance among farmers. Today, it is the most common method of crop improvement, and the vast majority of crop varieties have resulted from 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. Thus, component crops used in mixed cropping have different canopy. Thus, they can be used in seasons when food is scarce. Crop Production Management ,Improvement in Food Resources - Get topics notes, Online test, Video lectures, Doubts and Solutions for CBSE Class 9 on TopperLearning. Mixed cropping: This approach of growing crops involves growing two or more crops concurrently on the same land. Hybridization: The crossing between genetically dissimilar plants to produce a new variety is called hybridization. This crossing may be intervarietal (between different varieties), interspecific (between two different species of the same genus) or intergeneric (between different genera). Mendel onward, the hybridization had become the key method of crop improvement. Download free PDF of best NCERT Solutions , Class 9, Biology, CBSE- Improvement in Food Resources . Oil crops should give quality oil. Answer: As we know, weather conditions, soil quality and availability of water are the main factors on which crop yield depends. 2) One crop is tall growing and other is short growing. India is already an intensively farmed country. Inter specific Hybridization. Enrolled Students 115. What are the various ways to improve the variety of crops? BT cotton is a good example of genetically modified crop. Biotic factors such as pests, insects and diseases reduce the crop production. 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. 3) If one crop is deep rooted, the other has shallow roots. Thus, we can improve crop quality and quantity by incorporating the genes with desirable traits. (ii) Improved quality: The quality of crop products vary from crop to crop. Production practices show a wide variation among farmers in India. Two of them are as follows: The crossing of genetically dissimilar plants is referred to as hybridization. Quality seeds of improved varieties are used for their commercial production. The variety improvement is done for the following reasons. 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). 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 crop is selected by breeding for various useful characteristics; like disease resistance, response to fertilizers, product quality and high yields. 9th Class - CBSE - Biology - Improvement in Food Resources - 0 Questions - 0 Notes. Area of land under cultivation cannot be increased beyond certain level. Class 9 Biology Improvement Food Resources. Introducing the gene from BT equips cotton with an ability to ward off attacks from different types of insect pests. Quality product: To improve the quality of the food crops. Legumes and dried beans have a longer shelf-life and are economical. 4. This manure is called green manure. CLASS – IX Chapter 15 Improvement in food resources Worksheet - 1/4 1. Describe the mechanism of crop variety improvement. This video is unavailable. Question 1. 2. Grains are the major source of human food. The country needs more and more food to feed its ever growing population. Improvement in Food Resources Class 9 Extra Questions Long Answer Questions. The developed offsprings combine the qualities of both plants. 4) One crop needs comparatively lesser water and nutrients than the other. The desirable agronomic characteristics for crop improvements are:(i) Tallness and profuse branching for the fodder 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. Seasons when food is scarce of population on food crop production Class – IX Chapter 15 improvement in yield. Crops involves growing two or more crops concurrently on the safe and nutritious food which is the most common of! 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