Read and download NCERT Class 9 Science Improvement In Food Resources in NCERT book for Class 9 Science. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Science textbook for Class 9 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 9 Science to understand the answers of the exercise questions given at the end of this chapter
NCERT Book for Class 9 Science Chapter 15 Improvement In Food Resources
Class 9 Science students should refer to the following NCERT Book Chapter 15 Improvement In Food Resources in Class 9. This NCERT Book for Class 9 Science will be very useful for exams and help you to score good marks
Chapter 15 Improvement In Food Resources NCERT Book Class 9
IMPROVEMENT IN FOOD RESOURCES
We know that all living organisms need food. Food supplies proteins, carbohydrates, fats, vitamins and minerals, all of which we require for body development, growth and health. Both plants and animals are major sources of food for us. We obtain most of this food from agriculture and animal husbandry.
We read in newspapers that efforts are always being made to improve production from agriculture and animal husbandry. Why is this necessary? Why we cannot make do with the current levels of production? India is a very populous country. Ourpopulation is more than one billion people, and it is still growing. As food for this growing population, we will soon need more than a quarter of a billion tonnes of grain every year.
This can be done by farming on more land. But India is already intensively cultivated. As a result, we do not have any major scope for increasing the area of land under cultivation. Therefore, it is necessary to increase our production efficiency for both crops and livestock.
Efforts to meet the food demand by increasing food production have led to some successes so far. We have had the green revolution, which contributed to increased food-grain production. We have also had the white revolution, which has led to better and more efficient use as well as availability of milk. However, these revolutions mean that our natural resources are getting used more intensively. As a result, there are more chances of causing damage to our natural resources to the point of destroying their balance completely. Therefore, it is important that we should increase food production without degrading our environment and disturbing the balances maintaining it. Hence, there is a need for sustainable practices in agriculture and animal husbandry.
Also, simply increasing grain production for storage in warehouses cannot solve the problem of malnutrition and hunger. People should have money to purchase food. Food security depends on both availability of food and access to it. The majority of our population depends on agriculture for their livelihood. Increasing the incomes of people working in agriculture is therefore necessary to combat the problem of hunger. Scientific management practices should be undertaken to obtain high yields from farms. For sustained livelihood, one should undertake mixed farming, intercropping, and integrated farming practices, for example, combine agriculture with livestock/poultry/fisheries/ bee-keeping. The question thus becomes – how do we increase the yields of crops and livestock?
15.1 Improvement in Crop Yields
Cereals such as wheat, rice, maize, millets and sorghum provide us carbohydrate for energy requirement. Pulses like gram (chana), pea (matar), black gram (urad), green gram (moong), pigeon pea (arhar), lentil (masoor), provide us with protein. And oil seeds including soyabean, ground nut, sesame, castor, mustard, linseed and sunflower provide us with necessary fats (Fig. 15.1). Vegetables, spices and fruits provide a range of vitamins and minerals in addition to small amounts of proteins, carbohydrates and fats. In addition to these food crops, fodder crops like berseem, oats or sudan grass are raised as food for the livestock.
15.1.1 CROP VARIETY IMPROVEMENT
This approach depends on finding a crop variety that can give a good yield. Varieties or strains of crops can be selected by breeding for various useful characteristics such as disease resistance, response to fertilisers, product quality and high yields. One way of incorporating desirable characters into crop varieties is by hybridisation. Hybridisation refers to crossing between genetically dissimilar plants. This crossing may be intervarietal (between different varieties), interspecific (between two different species of the same genus) or intergeneric (between different genera). Another way of improving the crop is by introducing a gene that would provide the desired characteristic. This results in genetically modified crops.
For new varieties of crops to be accepted, it is necessary that the variety produces high yields under different conditions that are found in different areas. Farmers would need to be provided with good quality seeds of a particular variety, that is, the seeds should Fig. 15.1: Different types of crops all be of the same variety and germinate under the same conditions.
Please refer to attached file for NCERT Class 9 Science Improvement In Food Resources
NCERT Class 9 Science Matter In Our Surroundings |
NCERT Class 9 Science Matter In Our Surroundings Questions |
NCERT Class 9 Science Is Matter Around Us Pure |
NCERT Class 9 Science Is Matter Around Us Pure Questions |
NCERT Class 9 Science Atoms And Molecules |
NCERT Class 9 Science Atoms And Molecules Questions |
NCERT Class 9 Science Structure Of The Atom |
NCERT Class 9 Science Structure Of The Atom Questions |
NCERT Class 9 Science The Fundamental Unit Of Life |
NCERT Class 9 Science The Fundamental Unit Of Life Questions |
NCERT Class 9 Science Tissues |
NCERT Class 9 Science Tissues Questions |
NCERT Class 9 Science Diversity In Living Organisms |
NCERT Class 9 Science Diversity In Living Organisms Questions |
NCERT Class 9 Science Motion |
NCERT Class 9 Science Motion Questions |
NCERT Class 9 Science Force And Laws Of Motion |
NCERT Class 9 Science Force And Laws Of Motion Questions |
NCERT Class 9 Science Gravitation |
NCERT Class 9 Science Gravitation Questions |
NCERT Class 9 Science Work And Energy |
NCERT Class 9 Science Work And Energy Questions |
NCERT Class 9 Science Sound |
NCERT Class 9 Science Sound Questions |
NCERT Class 9 Science Why Do We Fall Ill |
NCERT Class 9 Science Why Do We Fall Ill Questions |
NCERT Class 9 Science Natural Resources |
NCERT Class 9 Science Natural Resources Questions |
NCERT Class 9 Science Improvement In Food Resources |
NCERT Class 9 Science Improvement In Food Resources Questions |
NCERT Class 9 Science Solutions and Answers |
NCERT Book Class 9 Science Chapter 15 Improvement In Food Resources
The above NCERT Books for Class 9 Science Chapter 15 Improvement In Food Resources have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 15 Improvement In Food Resources Science Class 9 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 15 Improvement In Food Resources NCERT etextbooks as the exams for Class 9 Science are always asked as per the syllabus defined in these ebooks. These Class 9 Chapter 15 Improvement In Food Resources book for Science also includes collection of question. Along with Science Class 9 NCERT Book in Pdf for Chapter 15 Improvement In Food Resources we have provided all NCERT Books in English Medium for Class 9 which will be really helpful for students who have opted for english language as a medium. Class 9 students will need their books in English so we have provided them here for all subjects in Class 9.
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