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    NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources

    Get NCERT Solutions Class 9 Science Chapter 15 Improvement In Food Resources PDF for free. These NCERT class 9 Science Solutions for Chapter 15 Improvement In Food Resources can help students prepare for CBSE 2022-23.

    NCERT SolutionsNCERT Class 9NCERT 9 ScienceChapter 15: Improvement In Food Resources

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    NCERT Solutions for Class 9 Science Chapter 15: Improvement In Food Resources

    NCERT Solutions for Class 9 Science Chapter 15: Improvement In Food Resources NCERT Solutions Class 9 Science Chapter 15 – Free PDF Download

    NCERT Solutions for Class 9 Chapter 15 Improvement in Food Resources are provided here to aid students in their CBSE Class 9 exam preparation and to help them understand the basic concepts in the chapter thoroughly.

    NCERT Solutions for Class 9 Science help students boost their self-confidence while preparing for the examination. These solutions help students to clear doubts instantly and in an effective way. NCERT Solutions for Class 9 Science are prepared by highly experienced professional subject experts for clear understanding. NCERT Solutions for Class 9 Science Chapter 15: Improvement in Food Resources explain the exercise and questions provided in the NCERT textbooks.

    Chapter 15 Improvement in Food Reso…

    Download the PDF of NCERT Solutions for Class 9 Science Chapter 15: Improvement in Food Resources

    Access answers of Science NCERT Class 9 Chapter 15: Improvement in Food Resources (All in-text and exercise questions solved)

    In-text Question 1.1 Page number: 204

    Q1. What do we get from cereals, pulses, fruits and vegetables?Ans:

    Cereals are the source of carbohydrates and are the main source of energy.

    Pulses provide protein for growth and development.

    Vegetables and fruits are loaded with minerals, vitamins, carbohydrates, proteins and fats for overall development.

    In-text Question 1.2  Page Number: 205

    Q1. How do biotic and abiotic factors affect crop production?Ans:

    2 major factors that affect the crop are:

    Biotic factors like insects, rodents, pests, and many more spread the disease and reduce crop production.

    Abiotic factors like humidity, temperature, moisture, wind, rain, flood and many more destroy the crop raised.

    Q2. What are the desirable agronomic characteristics for crop improvement?Ans:

    The essential agronomic features required for crop improvement are:

    Profuse branching along with tallness in any fodder crop.

    Dwarfness in any cereals.

    In-text Question 1.3 Page Number: 206

    Q1. What are macro-nutrients, and why are they called macronutrients?Ans:

    Macro-nutrients are the fundamental elements that are used by plants in more quantity. Macro-nutrients needed by the plants are

    • Macro-nutrients as the constituent of protoplasm.

    • Phosphorus, Nitrogen, and Sulphur are present in proteins.

    • Calcium exists in the cell wall.

    • Magnesium is a significant component of chlorophyll.

    Q2. How do plants get nutrients?Ans:

    There are 16 basic essential nutrients required by plants to grow. Carbon and Oxygen are supplied by water, and the remaining nutrients are supplied through the soil.

    In-text Question 1.4 Page Number: 207

    Q1. Compare the use of manure and fertilisers in maintaining soil fertility.Ans:

    Manure improves soil quality with added nutrients.

    Manure provides extra organic matter called humus to the soil and therefore increasing the water retention capacity of sandy soils and drainage in clayey soil.

    Manures reduce soil erosion.

    They provide food for soil-friendly bacteria, which are helpful in growing crops.

    The effects of fertilisers are

    Fertilisers make the soil become too dry and powdered and raise the rate of soil erosion.

    The organic matter decreases by decreasing the porosity of the soil; hence, the plant roots do not get oxygen properly.

    The nature of soil changes, either basic or acidic.

    In-text Question 1.5  Page Number: 208

    Q1. Which of the following conditions will give the most benefits? Why? (a) Farmers use high-quality seeds; do not adopt irrigation or use fertilisers. (b) Farmers use ordinary seeds, adopt irrigation and use fertiliser. (c) Farmers use quality seeds, adopt irrigation, use fertiliser and use crop protection measures.Ans:

    Option (c) 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.

    In-text Question 1.6 Page Number: 209

    Q1. Why should preventive measures and biological control methods be preferred for protecting crops?Ans:

    Over-exposure to chemicals leads to environmental problems; hence, biological methods are preferred for protecting crops from pathogens, insects and rodents, along with increasing production. Since chemicals are harmful to plants and also to the animals which feed on them, bio-pesticides are used as a safe way of crop protection.

    Q2. What factors may be responsible for the losses of grains during storage?Ans: Biotic and Abiotic factors are responsible for the loss of grains during storage like

    स्रोत : byjus.com

    NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources

    NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources (Biology) solved by Expert Teachers as per NCERT (CBSE) Book guidelines. CBSE Class 9 Science (Biology) Chapter 15 Improvement in Food Resources Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks.

    NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources

    NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources – Here are all the NCERT solutions for Class 9 Science Chapter 15. This solution contains questions, answers, images, step by step explanations of the complete Chapter 15 titled Improvement in Food Resources of Science taught in class 9. If you are a student of class 9 who is using NCERT Textbook to study Science, then you must come across Chapter 15 Improvement in Food Resources. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 9 Science Chapter 15 Improvement in Food Resources in one place. For a better understanding of this chapter, you should also see Chapter 15 Improvement in Food Resources Class 9 notes , Science.

    NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources

    Topics and Sub Topics in Class 9 Science Chapter 15 Improvement in Food Resources:

    Improvement in Food Resources

    Improvement in Crop Yields

    Animal Husbandry

    These solutions are part of NCERT Solutions for Class 9 Science. Here we have given Class 9 NCERT Science Text book Solutions for Chapter 15 Improvement in Food Resources.

    In-Text Questions SolvedNCERT Textbook for Class 9 Science – Page 204Question 1. What do we get from cereals, pulses, fruits and vegetables? Answer: Cereals give carbohydrates which provide energy.

    Pulses give proteins which build our body.

    Vegetables and fruits provide vitamins and minerals.

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    Class 9 Science NCERT Textbook – Page 205Question 1. How do biotic and abiotic factors affect crop production?Answer: Factors responsible for loss of grains, during storage and production are:

    (a) Biotic factors like rodents, pests, insects, etc.

    (b) Abiotic factors like temperature, humidity, moisture, etc.

    Combination of both biotic and abiotic factors causes :

    infestation of insects

    weight loss

    poor germination ability

    degradation in quality

    discolouration poor market price

    Question 2. What are the desirable agronomic characteristics for crop improvements?Answer: Desirable agronomic characteristics for crop improvements are:

    (a) Tallness and profuse branching are desirable characters for fodder crops.

    (b) Dwarfness is desired in cereals, so that less nutrients are consumed by these crops.

    Formulae Handbook for Class 9 Maths and ScienceEducational Loans in India

    NCERT Textbook for Class 9 Science – Page 206Question 1. What are macro-nutrients and why are they called macro-nutrients? Answer: Macro-nutrients are the essential elements which are utilised by plants in large quantities. Many macro-nutrients are required by the plants for the following functions:

    As the constituent of protoplasm

    N, P, S are present in proteins

    Ca is present in cell wall

    Mg is important constituent of chlorophyll

    Question 2. How do plants get nutrients? Answer: Plants get nutrients from air, water and soil. There are, sixteen nutrients essential for the growth of plants. Carbon and Oxygen are supplied by water. The remaining thirteen nutrients are supplied by soil.Class 9 Science NCERT Textbook – Page 207Question 1. Compare the use of manure and fertilizers in maintaining soil fertility. Answer: Effects of using manures on soil quality:

    The manures enrich the soil with nutrients.

    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.

    The addition of manures reduces soil erosion.

    They provide food for soil organisms, like soil friendly bacteria.

    Effects of using fertilizers on soil quality:

    By the continuous use of fertilizers, the soil becomes powdery, dry and rate of soil erosion increases.

    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,

    The nature of soil changes to acidic or basic.

    NCERT Textbook for Class 9 Science – Page 208Question 1. Which of the following conditions will give the most benefits? Why? (a) Farmers use high-quality seeds, do not adopt irrigation or use fertilizers. (b) Farmers use ordinary seeds, adopt irrigation and use fertilizer. (c) Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures. Answer: In this, (c) Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures.

    Use of any quality seeds is not sufficient until they are properly irrigated, enriched with fertilizers and protected from biotic factors. Hence, option (c) will give the most benefits.

    स्रोत : www.learncbse.in

    CBSE Class 9 Science Chapter 15 Improvement in Food Resources Important Questions 2022

    Get chapter-wise important questions for CBSE Class 9 Science Chapter 15 Improvement in Food Resources with answers on Vedantu. Download the PDF for free and revise these important questions for CBSE exam 2022-23.

    Class 9 CBSE Science Important Questions for Chapter 15 - Improvement in Food Resources

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    CBSE Class 9 Science Chapter-15 Important Questions - Free PDF Download

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    Download CBSE Class 9 Science Important Questions 2022-23 PDF

    Also, check CBSE Class 9 Science Important Questions for other chapters:

    CBSE Class 9 Science Important Questions

    Sl.No Chapter No Chapter Name 1 Chapter 1

    Matter in Our Surroundings

    2 Chapter 2

    Is Matter Around Us Pure

    3 Chapter 3 Atoms and Molecules 4 Chapter 4 Structure of Atom 5 Chapter 5

    The Fundamental Unit of Life

    6 Chapter 6 Tissues 7 Chapter 7

    Diversity in Living Organisms

    8 Chapter 8 Motion 9 Chapter 9

    Force and Laws of Motion

    10 Chapter 10 Gravitation 11 Chapter 11 Work and Energy 12 Chapter 12 Sound 13 Chapter 13 Why Do We Fall ill 14 Chapter 14 Natural Resources 15 Chapter 15

    Improvement in Food Resources

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    Study Important Questions for Class 9 Science Chapter 15 - Improvement in Food Resources

    2 Marks Questions

    1. What do we get from cereals,pulses, fruits and vegetables?

    Ans: Cereals provide carbohydrates, pulses provide proteins, while fruits and vegetables provide vitamins and minerals.

    2. What factors may be responsible for losses of grains during storage?

    Ans: Both biotic and abiotic factors may be responsible for losses of grains during storage are :

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