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NCERT Solutions for Class 9 Science Chapter 12 Improvement in Food Resources

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NCERT Solutions for class 9 Chapter-12 Improvement In Food Resources: The chapter on ‘Improvement In Food Resources’ is important for students approaching the home exams. This article introduces NCERT solutions designed to help students explain the concepts of further learning and how to write to get good grades on exams. The solutions are presented in very simple language for ease of understanding.

NCERT CBSE Chapter 9 ‘Improvement In Food Resources’ of Class 9 explains a change that makes the quality of various sources of food better to meet the demand of the increasing population, which depends on the selection criteria. The selection criteria may be high yield, disease resistance from pests, response to fertilizers, climate tolerance, etc. Revise the basic concepts of ‘Improvement In Food Resources’ for quick revision and class notes.

NCERT Solutions For Class 09 Chapter 12 of Page 141

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

Answer:

Cereals provide us with carbohydrates and thus energy. The pulses provide us with proteins that help in the growth, development, repairing of tissues, etc. Fruits and vegetables give us carbohydrates, protein, fat, vitamins, minerals, and lots of fiber. Fat gives us energy. Vitamins and minerals protect us from many diseases, and fibers keep our digestive system healthy.

NCERT Solutions For Class 09 Chapter 12 of Page 142

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

Answer:

The two major factors which affect crops are Biotic and abiotic factors. Biotic factors are living e.g. insects, rodents, pests, etc which spread diseases and drop crop production. Abiotic factors are non-living e.g. humidity, temperature, moisture, wind, rain, flood, etc which destroy crop production.

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

Answer:

Desirable agronomic traits to improve crops are:

  1. Height and profuse branching in useful plants such as fodder.
  2. Dwarfism in Cereals.

NCERT Solutions For Class 09 Chapter 12 of Page 143

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

Answer:

Macro-nutrients are the nutrients that are required in large quantities for growth and development. As they are required in large quantities, they are called macro-nutrients e.g. nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur are macronutrients required by plants.

Q2: How do plants get nutrients?

Answer:

Plants get their nutrients from the soil. Plants absorb these nutrients through their roots when they absorb water. Nutrients are divided into macronutrients and micronutrients. The macronutrients for plants are nitrogen, phosphorus, and potassium. Some examples of micronutrients are iron, boron, copper, chlorine, etc.

NCERT Solutions For Class 09 Chapter 12 of Page 144

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

Answer:

The comparison between the use of manure and fertilizers:

Manure

Fertilizers

It provides humus to the soil.

They do not provide humus to the soil.

It is relatively less in nutrient content.

They are rich in nutrient content.

NCERT Solutions For Class 09 Chapter 12 of Page 145

Q1: 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:

Condition with option (c) will give the most benefits i.e. farmers use quality seeds, adopt irrigation, use fertilizer, and use crop protection measures.

  1. If a farmer uses good quality seeds, then there are chances for almost all the seeds to germinate.
  2. Proper irrigation improves the availability of water to the crops.
  3. Fertilizers are responsible for healthy growth and development among plants as they provide essential nutrients e.g. phosphorus, nitrogen, potassium, etc.
  4. Crop protection measures include methods like control of weeds, pests, and infectious agents. So, improves crop productivity.

NCERT Solutions For Class 09 Chapter 12 of Page 146

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

Answer:

Preventive measures and biological control methods should be preferred in plant protection since these methods are environmentally friendly, targeted, and do not harm various living forms but they keep pathogens, insects, and pests away.

Q2: What factors may be responsible for the losses of grains during storage?

Answer:

Both biotic and abiotic factors are responsible for grain loss during storage. Abiotic factors are non-living components including grain moisture, humidity, and temperature that are responsible for grain losses during storage. Biotic factors include living components such as insects, rats, birds, mites, bacteria, and fungi.

NCERT Solutions For Class 09 Chapter 12 of Page 147

Q1: Which method is commonly used for improving cattle breeds and why?

Answer:

The method which is commonly used for improving cattle breeds is cross-breeding. It involves the breeding of two different breeds from the same species to form a new breed, i.e. hybrid vigor (production of offspring with desirable and superior characteristics.

NCERT Solutions For Class 09 Chapter 12 of Page 148

Q1: What management practices are common in dairy and poultry farming?

Answer:

Dairy farming is the practice of agriculture where the raising and utilizing of dairy animals are involved. Poultry farming involves the practice of raising birds which results in the production of eggs and meat. The management practices which are common in dairy and poultry farming are-

  1. A clean and adequate shelter.
  2. Hygienic and nutritionally adequate food.
  3. A well-ventilated space.
  4. Vaccination for prevention of diseases.

Q2: What are the differences between broilers and layers and their management?

Answer:

The differences between broilers and layers are:

Broilers

Layers

These are the poultry birds produced for meat production

These are the poultry birds produced for egg production

They require maintenance of temperature, and hygiene to grow fast

They require sufficient space and lighting to grow

Their daily food requirement is rich in proteins, fats, and vitamin A and vitamin K

Their daily food requirements are rich in vitamins and minerals

Q3: Discuss the implications of the following statement: “It is interesting to note that poultry is India’s most efficient converter of low-fiber foodstuff (which is unfit for human consumption) into highly nutritious animal protein food.”

Answer:

Poultry farming focuses on raising domestic birds for egg and chicken meat production. They feed on animal sources which mainly consisted of roughage for having good quality feathers, eggs, and chicken. For such reasons, it is stated that “poultry is India’s most efficient converter of low fiber foodstuff into highly nutritious animal protein food”.

NCERT Solutions For Class 09 Chapter 12 of Page 150

Q1: How are fish obtained?

Answer:

The fish are obtained by two methods, i.e. capturing fish and fish culture. In the fish capturing method, the fish are captured from different water bodies, i.e. freshwater or marine. In fish culturing, the breeding of fish is involved, for which, they are collected from marine as well as freshwater sources.

Q2: What are the advantages of composite fish culture?

Answer:

The advantages of composite fish culture are given below:

  1. In a single water source, 5 or 6 types of fish species can be cultured as they are non-competitive for food.
  2. The survival rate of the fish increases
  3. More yield of fish can be obtained

NCERT Solutions For Class 09 Chapter 12 of Page 150

Q1: What are the desirable characteristics of bee varieties suitable for honey production?

Answer:

The following are the desirable characteristics of bee varieties suitable for honey production:

  1. Bees are said to produce large quantities of honey and wax.
  2. Bees should reside in their hives for a long time.
  3. Bees should breed well.

Q2: What is pasturage, and how is it related to honey production?

Answer:

Pasturage is the provision of flowers that bees can use to collect nectar and pollen. It is related to honey production as it determines the flavor and amount of honey.

NCERT Solutions For Class 09 Chapter 12

Q1: Explain any one method of crop production which ensures high yield.

Answer:

Crop rotation is one of the methods of crop production which ensures high yield. It is the method in which two or more varieties of crops are grown on the same land in recurrent succession.

Q2: Why are manure and fertilizers used in fields?

Answer:

Manure and fertilizers are used in the fields:

  1. To provide essential nutrients to the soil
  2. To enhance soil fertility
  3. To ensure productive vegetative growth for high crop yield

Q3: What are the advantages of inter-cropping and crop rotation?

Answer:

The advantages of inter-cropping are:

  1. It prevents soil erosion.
  2. It adds nutrients to the main crop.
  3. It reduces the dependence on fertilizers which are harmful.

The advantages of crop rotation are:

  1. It helps in returning nutrients to the soil.
  2. It interrupts the cycles of pests.
  3. It improves soil fertility by increasing biomass by increasing biodiversity on the farm.

Q4: What is genetic manipulation? How is it useful in agricultural practices?

Answer:

Genetic manipulation (also known as genetic modification or genetic engineering) is the practice of using laboratory technologies are used to change the composition of the organism’s DNA. It is useful in agricultural practices as:

  1. It helps to improve crop variety.
  2. It ensures food security and the production of insect-resistant crops.
  3. It also improves the quality and yield of crops.

Q5: How do storage grain losses occur?

Answer:

The two major factors which affect crops are Biotic and abiotic factors. Biotic factors are living e.g. insects, rodents, pests, etc which spread diseases and drop crop production. Abiotic factors are non-living e.g. humidity, temperature, moisture, wind, rain, flood, etc which destroy crop production.

Q6: How do good animal husbandry practices benefit farmers?

Answer:

The benefits of animal husbandry practice for farmers include:

  1. It improves breeding style.
  2. It increases the yields of many products like milk, meat, eggs, etc.
  3. It helps farmers to manage different tasks for animals like feeding, sheltering and protecting them against diseases by vaccination.

Q7: What are the benefits of cattle farming?

Answer:

The benefits of keeping cattle include:

  1. Higher quality and quantity of milk can be produced. 
  2. Draught labor animals, like ox, can be produced for fieldwork. 
  3. The waste generated by the drought labor animals can be used as manure to increase soil fertility.
  4. Disease-resistant varieties can be produced by the cross-breeding method.
  5. A load of labor animals can be minimized by the methods like tilling, irrigation, and carting.
  6. It is a good source of employment and can generate a good income to support.

Q8: For increasing production, what is common in poultry, fisheries, and bee-keeping?

Answer:

The common feature of fishing and bee-keeping is good agricultural techniques. The most important thing is the regular cleaning of the yards. It is also necessary to maintain temperature and prevent and treat many diseases, followed by vaccination.

Q9: How do you differentiate between capture fishing, agriculture, and aquaculture?

Answer:

Capture fishing

Mari-culture

Aquaculture

It is catching of fish from the natural water bodies

It is culturing and harvesting of fin fish and shellfish in the marine water sources

It is culturing and harvesting of fish, plants, and animals in the water bodies.

Seeding/rearing of fish is not involved

Seeding/rearing is involved

Seeding/rearing is involved

Features of CBSE Class 9 Science NCERT Solutions for Chapter 15 Improvement in Food Resources

Discover the key features of our NCERT solutions for CBSE Class 9 Chapter 15 – Improvement in Food Resources. These points highlight why our solutions are the ideal choice for your exam preparation:

  1. Comprehensive Solutions: Our solutions cover all the questions related to the chapter found in the corresponding NCERT textbooks.
  2. Exam-focused Approach: Our solutions are designed to assist you in CBSE board examinations, Science Olympiads, and various competitive exams.
  3. Student-friendly Language: We use simple and easily understandable language to ensure that students grasp the concepts effortlessly.
  4. Expertly Curated Solutions: Our subject experts meticulously research every concept to provide accurate and authentic information in the solutions.
  5. Detailed and Analytical: Our solutions offer in-depth explanations and analysis to help students excel in their exam preparations.

Choose our NCERT solutions to enhance your understanding and master the topic of Improvement in Food Resources.

Also Check:

FAQ’s – NCERT Solutions for Class 9 Science Chapter 12

Q1. How are the NCERT Solutions for Class 9 Science Chapter 12 structured on GeeksforGeeks?

The NCERT Solutions crafted by GeeksforGeeks adhere meticulously to the latest CBSE guidelines, offering precise and reliable reference material for students preparing for their CBSE exams. These solutions foster a deep understanding of key concepts, crucial for success in exams. Each topic is supplemented with illustrative examples and visual aids, enhancing students’ comprehension through visual learning. By promoting smart learning and honing efficient answering skills, these solutions contribute to improved academic performance and higher scores.

Q2. What are the topics and subtopics included in Chapter 12 of NCERT Solutions for Class 9 Science?

This are the topics and subtopics covered in Chapter 12 of NCERT Solutions for Class 9 Science:

  1. Manure
  2. Fertilizers
  3. Irrigation
  4. Cropping Patterns
  5. Animal Husbandry
  6. Cattle Farming
  7. Poultry Farming
  8. Bee Keeping

Q3. How can students benefit from the CBSE Free PDF Download available through online free resources for their studies?

Students can benefit significantly from the CBSE Free PDF Download available through online free resources by accessing study materials, textbooks, and other educational resources at no cost. These PDFs can serve as valuable supplements to their learning, enabling them to review, practice, and deepen their understanding of various subjects and topics. It offers a convenient and accessible way to study and prepare for exams without the need for physical textbooks, making it a cost-effective and flexible option for students seeking quality educational materials.



Last Updated : 09 Nov, 2023
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