{"id":5055,"date":"2023-03-26T05:10:31","date_gmt":"2023-03-26T05:10:31","guid":{"rendered":"https:\/\/theexampillar.com\/ncert\/?p=5055"},"modified":"2023-03-28T06:16:33","modified_gmt":"2023-03-28T06:16:33","slug":"ncert-solutions-class-9-science-chapter-15-improvement-in-food-resources","status":"publish","type":"post","link":"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-9-science-chapter-15-improvement-in-food-resources\/","title":{"rendered":"NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources"},"content":{"rendered":"<h2 style=\"text-align: center;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">NCERT Solutions Class 9 Science\u00a0<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">The NCERT Solutions in English Language for Class 9 Science <strong>Chapter &#8211; 15 (Improvement in Food Resources) <\/strong>has been provided here to help the students in solving the questions from this exercise.\u00a0<\/span><\/p>\n<h2 style=\"text-align: center;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">Chapter &#8211; 15 (Improvement in Food Resources)\u00a0<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #ff0000;\"><strong>Questions<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. What do we get from cereals, pulses, fruits and vegetables?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>Cereals give carbohydrates which provide energy.<br \/>\nPulses give proteins which build our body.<br \/>\nVegetables and fruits provide vitamins and minerals.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. How do biotic and abiotic factors affect crop production?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>Factors responsible for loss of grains, during storage and production are:<br \/>\n<strong>(a)<\/strong> Biotic factors like rodents, pests, insects, etc.<\/span><br \/>\n<span style=\"color: #000000;\"><strong>(b)<\/strong> Abiotic factors like temperature, humidity, moisture, etc. <\/span><br \/>\n<span style=\"color: #000000;\">Combination of both biotic and abiotic factors causes :<\/span><br \/>\n<span style=\"color: #000000;\">1. infestation of insects<\/span><br \/>\n<span style=\"color: #000000;\">2. weight loss<\/span><br \/>\n<span style=\"color: #000000;\">3. poor germination ability<\/span><br \/>\n<span style=\"color: #000000;\">4. degradation in quality<\/span><br \/>\n<span style=\"color: #000000;\">5. discolouration<\/span><br \/>\n<span style=\"color: #000000;\">6. poor market price<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. What are the desirable agronomic characteristics for crop improvement?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>The essential agronomic features required for crop improvement are:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Profuse branching along with tallness in any fodder crop.<\/span><\/li>\n<li><span style=\"color: #000000;\">Dwarfness in any cereals.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. What are macro-nutrients, and why are they called macronutrients?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong><\/span><span style=\"color: #000000;\">Macro-nutrients are the fundamental elements that are used by plants in more quantity. Macro-nutrients needed by the plants are :<\/span><\/p>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\">Macro-nutrients as the constituent of protoplasm.<\/span><\/li>\n<li style=\"text-align: justify;\">Phosphorus, Nitrogen, and Sulphur are present in proteins.<\/li>\n<li style=\"text-align: justify;\">Calcium exists in the cell wall.<\/li>\n<li style=\"text-align: justify;\">Magnesium is a significant component of chlorophyll.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. How do plants get nutrients?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>Plants require sixteen essential nutrients from nature for their growth and development. All these nutrients are obtained from air, water, and soil. Soil is the major source of nutrients. Thirteen of these nutrients are available from soil. The remaining three nutrients (carbon, oxygen, and hydrogen) are obtained from air and water.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Compare the use of manure and fertilisers in maintaining soil fertility.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>Effects of using manures on soil quality:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">The manures enrich the soil with nutrients.<\/span><\/li>\n<li><span style=\"color: #000000;\">They provide a lot of organic matter (humus) to the soil and thus restores water retention capacity of sandy soils and drainage in clayey soil.<\/span><\/li>\n<li><span style=\"color: #000000;\">The addition of manures reduces soil erosion.<\/span><\/li>\n<li><span style=\"color: #000000;\">They provide food for soil organisms, like soil friendly bacteria.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong><span style=\"color: #000000;\">The effects of fertilisers are<\/span><\/strong><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">By the continuous use of fertilizers, the soil becomes powdery, dry and rate of soil erosion increases.<\/span><\/li>\n<li><span style=\"color: #000000;\">By the use of fertilizers, the organic matter decreases which further decreases the porosity of soil and the plant roots do not get oxygen properly.<\/span><\/li>\n<li><span style=\"color: #000000;\">The nature of soil changes to acidic or basic.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Which of the following conditions will give the most benefits? Why?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>(a) Farmers use high-quality seeds; do not adopt irrigation or use fertilisers.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>(b) Farmers use ordinary seeds, adopt irrigation and use fertiliser.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>(c) Farmers use quality seeds, adopt irrigation, use fertiliser and use crop protection measures.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong><\/span><span style=\"color: #000000;\">Option<strong>\u00a0(c)\u00a0<\/strong>will give the most benefits because the use of good quality seeds is not only sufficient until the soil is properly irrigated, enriched with fertilisers and protected from biotic factors.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Why should preventive measures and biological control methods be preferred for protecting crops?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Diseases in plants are caused by pathogens. To get rid of pathogens, some preventive measures and biological control methods are used as they are simple, economic and minimise pollution without affecting the soil quality.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. What factors may be responsible for the losses of grains during storage?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>The factors responsible for losses of grains during storage are:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Abiotic factors like moisture (present in food grains), humidity (of air) and temperature.<\/span><\/li>\n<li><span style=\"color: #000000;\">Biotic factors like insects, rodents, birds, mites, bacteria and fungi.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Which method is commonly used for improving cattle breeds and why?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>Cross Breeding is commonly used for improving cattle breeds.Cross breeding between two good varieties of cattle will produce a new improved variety. For example, the cross between foreign breeds such as Jersey Brown, Swiss and Indian breeds such as Red Sindhi, Sahiwal produces a new variety having qualities of both breeds.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Discuss the implications of the following statement:<br \/>\n\u201c<\/strong><strong>It is interesting to note that poultry is India&#8217;s most efficient converter of low fibre food stuff (which is unfit for human consumption) into highly nutritious animal protein food.\u201d<br \/>\nAnswer &#8211;<\/strong>\u00a0Poultry in India is the most efficient converter of low fibre food stuff into highly nutritious animal protein food. In poultry farming, domestic fowls are raised to produce eggs and chicken. For this, the fowls are given animal feeds in the form of roughage, which mainly consists of fibres. Thus, by feeding animals a fibre rich diet, the poultry gives highly nutritious food in the form of eggs and chicken.<\/span><strong><br \/>\n<\/strong><\/p>\n<div>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><strong style=\"color: #000000;\">1. What management practices are common in dairy and poultry farming?<br \/>\n<\/strong><strong style=\"color: #000000;\">Answ<span style=\"color: #000000;\">er &#8211;\u00a0<\/span><\/strong><span style=\"color: #000000;\">Common management practices in dairy and poultry farming are:<\/span><\/p>\n<\/div>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Proper shelter facilities and their regular cleaning.<\/span><\/li>\n<li><span style=\"color: #000000;\">Some basic hygienic conditions such as clean water, nutritious food, etc.<\/span><\/li>\n<li><span style=\"color: #000000;\">Animals are kept in spacious, airy, and ventilated place.<\/span><\/li>\n<li><span style=\"color: #000000;\">Prevention and cure of diseases at the right time is ensured.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. What are the differences between broilers and layers and their management?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Broilers &#8211; <\/strong><\/span><span style=\"color: #000000;\">The poultry bird raised for meat purposes is called a broiler. Broilers feed on protein-rich adequate-fat food. The level of vitamins A and K is kept high in poultry feeds.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Layers &#8211; <\/strong><\/span><span style=\"color: #000000;\">The egg-laying poultry bird is called a layer. The housing, environmental and nutritional requirements of broilers vary from those of egg layers. Layers require proper lighting and enough space.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. How are fish obtained?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong><\/span><span style=\"color: #000000;\">Fishes are obtained in two ways:<\/span><\/p>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Capture fishing &#8211; <\/strong>Obtaining fish from natural resources.<\/span><\/li>\n<li style=\"text-align: justify;\"><strong>Culture Fishery &#8211; <\/strong>Culturing of fishes in freshwater ecosystems, like rivers, ponds and lakes, also including marine.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. What are the advantages of composite fish culture?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong><\/span><span style=\"color: #000000;\">The advantages of composite fish culture are<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Fish can be grown in crop fields especially paddy.<\/span><\/li>\n<li><span style=\"color: #000000;\">Intensive Fish farming is possible because plenty of water is available during crop seasons.<\/span><\/li>\n<li>In this system both local and imported fish species can be cultivated.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong><span style=\"color: #ff0000;\">Questions<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. What are the desirable characteristics of bee varieties suitable for honey production?<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>Bee varieties having the following desirable characters are suitable for honey production:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">They should yield high quantity of honey.<\/span><\/li>\n<li><span style=\"color: #000000;\">They should not sting much.<\/span><\/li>\n<li><span style=\"color: #000000;\">They should stay in the beehive for long durations.<\/span><\/li>\n<li><span style=\"color: #000000;\">They should breed very well.<\/span><\/li>\n<\/ul>\n<p><strong style=\"color: #000000;\">2. What is pasturage, and how is it related to honey production?<br \/>\n<\/strong><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>Pasturage is the availability of flowers from which bees collect nectar and pollen. It is related to the production of honey as it determines the taste and quantity of honey.<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt; color: #ff0000;\"><strong>Exercise <\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Explain any one method of crop production which ensures high yield.<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>Inter cropping is a method of crop production which ensures high yield. It is a practice of growing two or more crops simultaneously. in the same field in rows. In inter cropping definite row patterns are followed such as one row of main crop of is followed by two row of intercrop.<br \/>\nIn inter cropping there is greater utilisation of the interspaced area, light, nutrients, water and air. As a result productivity per unit area increased.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. Why are manure and fertilisers used in fields?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>They are used to ensure good vegetative growth (leaves, branches and flowers), giving rise to healthy plants, that results in high crop production.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>3. What are the advantages of inter-cropping and crop rotation?<br \/>\n<\/strong><strong>Answer &#8211;<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Inter-cropping<\/strong><\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Checks pests and rodents and hence decreases the chances of the spoiling of whole crops<\/span><\/li>\n<li><span style=\"color: #000000;\">Decreased chances of soil erosion<\/span><\/li>\n<li><span style=\"color: #000000;\">Reduced loss of crops with high yield<\/span><\/li>\n<li><span style=\"color: #000000;\">Less water requirement<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Crop rotation<\/strong><\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Farmers can grow two or three crops annually<\/span><\/li>\n<li><span style=\"color: #000000;\">Pulses take nitrogen directly from the atmosphere and hence require a minimal amount of fertilisers<\/span><\/li>\n<li><span style=\"color: #000000;\">Both fruits and vegetables can be grown easily<\/span><\/li>\n<li><span style=\"color: #000000;\">Best use of land with a proper supply of nutrients<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>4. What is genetic manipulation? How is it useful in agricultural practices?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>Genetic manipulation is a process in which the transfer of genes takes place from one organism to another. Here, a gene of a particular character is introduced inside the chromosome cell, resulting in a transgenic plant.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Example: BT Cotton is a genetically modified crop which carries bacterial genes that protect this plant from insects. These are used in plants like brinjal, cabbage, rice, cauliflower, and maize crops to get protection from insects.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>5. How do storage grain losses occur?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>The factors responsible for loss of grains during storage are:<br \/>\n1. Abiotic factors like moisture (present in foodgrains), humidity (of air) and temperature.<br \/>\n2 Biotic factors like insects, rodents, birds, mites and bacteria.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>6. How do good animal husbandry practices benefit farmers?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>Good practice of animal husbandry benefits farmers in the following ways:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Yields in good quality cattle<\/span><\/li>\n<li><span style=\"color: #000000;\">Better quality of milk production<\/span><\/li>\n<li><span style=\"color: #000000;\">Use in agriculture for carting, irrigation and tilling<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>7. What are the benefits of cattle farming?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>The benefits of cattle farming are<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Cattle are used for agricultural purposes<\/span><\/li>\n<li><span style=\"color: #000000;\">Generation of good quality cattle<\/span><\/li>\n<li><span style=\"color: #000000;\">Milking and meat purpose<\/span><\/li>\n<li><span style=\"color: #000000;\">The skin of cattle is used for the leather and wool industry<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>8. For increasing production, what is common in poultry, fisheries and bee-keeping?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong>Through cross breeding, the production of poultry, fisheries and bee-keeping can be increased.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>9. How do you differentiate between capture fishing, mariculture and aquaculture?<br \/>\n<\/strong><strong>Answer &#8211;\u00a0<\/strong><strong>Capture fishing &#8211; <\/strong>It is a technique in which fish are captured from various sources of natural resources like sea, rivers, lakes and ponds.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Mariculture &#8211; <\/strong>Culturing of fish in marine fishes like prawns, oysters, bhetki and mullets in marine water for commercial use. <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Aquaculture &#8211; <\/strong>Involved in culturing of fish in both marine and freshwater.<\/span><\/p>\n<p><a href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-9-science\/\" target=\"_blank\" rel=\"noopener\"><b><i>Go Back To Chapters<\/i><\/b><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions Class 9 Science\u00a0 The NCERT Solutions in English Language for Class 9 Science Chapter &#8211; 15 (Improvement in Food Resources) has been provided here to help the students in solving the questions from this exercise.\u00a0 Chapter &#8211; 15 (Improvement in Food Resources)\u00a0 Questions 1. What do we get from cereals, pulses, fruits and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[729],"tags":[730,760,761,733,5],"class_list":["post-5055","post","type-post","status-publish","format-standard","hentry","category-class-9-science","tag-class-9-ncert-solutions","tag-ncert-class-9-science-chapter-15-improvement-in-food-resources","tag-ncert-solutions-class-9-science-chapter-15-in-english","tag-ncert-solutions-class-9-science-in-english","tag-ncert-solutions-in-english"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.9 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources | TheExamPillar NCERT<\/title>\n<meta name=\"description\" content=\"NCERT Solutions Class 9 Science\u00a0The NCERT Solutions in English Language for Class 9 Science Chapter - 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