This video is unavailable. 1) Higher yield: The main aim of crop improvement is to improve the productivity of economic produce, e.g. Crop variety improvement, crop production improvement and crop protection management are three major ways to improve food crops production. We know resources are very limited, but the demand is very high. Hybridization was first of all practically utilized in crop improvement by German botanist Joseph Koerauter in 1760. Two of them are as follows: The crossing of genetically dissimilar plants is referred to as hybridization. By this technique, what we mean is the combination of desirable characteristics from many crops into a single hybrid crop. This is generally done by hybridization. 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 population explosion has led to a greater demand for basic requirements such as food, shelter, clothing, etc. These varieties are multiplied and supplied to farmers. Thus, cultivation has been limited to a small area. Download free PDF of best NCERT Solutions , Class 9, Biology, CBSE- Improvement in Food Resources . What is hybridization? Explain briefly. Some farmers do not have capital to buy seeds or latest farm equipments. The developed offsprings combine the qualities of both plants. What are the purposes of crop variety improvement? and abiotic factors like hot, cold, drought, salinity, etc. Resistant variety can withstand these factors and give a high yield. crop variety improvement For this purpose, a crop variety is chosen which can give good yield. Related Concepts. CROP VARIETY IMPROVEMENT - 2. Hence, there is a need for various methods to improve farm yield so that food for the huge population can be made available. (ii) Dwarfness in cereals, so that the crops consume less nutrients. This is done by hybridisation. You can also get free sample papers, Notes, Important Questions. Initially, the chapter, Improvement in Food Resources focuses on the improvement in crop … Hybridization: The crossing between genetically dissimilar plants to produce a new variety is called hybridization. Main topics discussed in Class 9 Science chapter- Improvement in Food Resources are: Improvement in Crop Yields; Crop variety improvement; Crop production management Today, it is the most common method of crop improvement, and the vast majority of crop varieties have resulted from hybridization. In the first part of the chapter, the students will learn about different types of fertilizers and how to use them. Questions 91636. Food provides us with the nutrients and energy that we need for the proper functioning and growth of the body. 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. The country needs more and more food to feed its ever growing population. Moreover, this definition also harps on the safe and nutritious food which is affordable to each member of the population. Due to this there is wide variation in farming practices in India. Some farmers have large farms while some others have very small plots. Watch Queue Queue 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. 2. Need for higher crop yield We can raise different strains of food crops with desirable traits naturally as well as scientifically. 2. Improvement in Food Resources Class 9 Extra Questions Long Answer Questions. It helps in the development of crops with desired traits such as high yields, disease resistance, quality product and response to fertilizers. Some places get plenty of rainfall, while some others may not get rainfall at all. Introducing the gene from BT equips cotton with an ability to ward off attacks from different types of insect pests. 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