Crop Variety Improvement • Factors by which variety improvement can be done are: → Good and healthy seeds → Hybridization: ... Notes and Study Material of Class 9 Science. 10. Crop variety improvement: Crop variety improvement brings in following advantages. Crop variety improvement. You can also get free sample papers, Notes, Important Questions. Polyploidy 5. Only green plants are autotrophs, i.e., they make their own food. cultivation and breeding and management of crops and livestocks (domestic animals). water and land, biomagnification of toxic substances. Crop Improvement Learn about major groups of activities that improve crop yield. example: food supplies proteins, carbohydrates, fats. a)Increase in the crop yield In northern India, there are following two distinct season crops: 1) Kharif season crops: These crops are grown in rainy seasons, i.e. The methods are: 1. It has become far more important that we should increase food production without degrading our environment and disturbing the natural balance. Improvement in crop yield *** Crop variety improvement **** Crop production management ***** Crop protection management *** ... Notes for All Classes and Many More... 90 b)Manure & Fertilizers: SN Manure Fertilizers 1 Manure is prepared by the decomposition of animal excreta and All these human activities have degraded our environment and caused following problems: soil erosion, salinization of soils, desertification, silting of rivers, floods, droughts. Class 9 - Biology - Improvement in Food Resources - Agriculture Improvements (Very Short Questions and Answers) (#cbsenotes)(#eduvictors) ... Name two methods to improve crop variety. Agriculture is an applied science which deals with the mass production of plants and animals useful to human beings, involving soil cultivation and breeding and management of crops and livestocks (domestic animals). This document is highly rated by Class 9 students and has been viewed 1267 times. Developer Bytes. They comprise grains, seeds, nuts, vegetables, fruits, legumes, spices, herbs, beverages, etc. Hybridisation is the crossing between genetically dissimilar plants to obtain crops having useful characteristics like disease resistance,good- … such as chicken pea or gram (chana), pea (matar), black gram (urad), green gram (moong), pigeon pea (arhar), lentil (masoor) and cow pea (lobia) provide us, crops such as soyabean, ground nut, sesame, castor, mustard, linseed, niger and sunflower. In order to get maximum returns, different crop combinations are grown on the same field in a pre-planned succession. Our notes of Chapter 15 Improvement in food resources are prepared by Maths experts in an easy to remember format, covering all syllabus of CBSE, KVPY, NTSE, Olympiads, NCERT & other Competitive Exams. ADVERTISEMENTS: The following points highlight the six methods of crop improvement. Taking care to prevent the biotic factors(diseases, insects and nematodes) andabiotic factors (drought, salinity, waterlogging, heat, cold and frost) that can affect the crop growth. As per latest CBSE syllabus. kharif season from the month of June to October. This increase in food production was due to crop variety improvement, crop production improvement and crop protection management. E.g., protein quality is important in pulses, oil quality in oilseeds, preserving quality in fruits and vegetables. Question 3 Why is it necessary to increase production of both, plants and animals? Hybridization technology: It is the process of cross - breeding two different varieties of crops to produce a new variety with good properties of both the crops. The entire NCERT textbook questions have been solved by best teachers for you. Good quality seeds must be provided to the farmers. Your email address will not be published. For example: paddy, soyabean, arhar, maize, millet, cotton, urad and moong are kharif season crops. No major scope of increasing area of land under cultivation. These revolutions include green revolution (bumper production of food grains), blue revolution (enhanced fish production), white revolution (increased milk production) and yellow revolution (increased oil production). NCERT Class 9 Science Chapter 15 is covered under unit 5 Food; Food Production and one can expect questions up to 4 marks. Collapse. Hybridization: The process of interbreeding between geneticallydivergent plants. Our scientists put efforts to, increase food production. 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