NCERT Solutions Class 9 Science Chapter 15

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

Science offers many opportunities  in the field of Engineering and Sciences students. However, it becomes complex and challenging for students  to comprehend  from grade nine onwards. The syllabus is vast and the easiest way to get through tests and exams is to memorise the key concepts which unfortunately doesn’t help much in the long run. It’s therefore extremely important to have a clear understanding of the subject to sail smoothly through the exams year after year. Moreover, topics learned from Class 9 onwards will have tremendous application in various entrance exams as well.   Therefore, students need to increase their focus while learning the concepts to build their aptitude. M, students interested in this subject can make a  huge difference in terms of the learning experience by adding NCERT Solutions in their study schedule. In addition, it prepares students for higher  classes.

Students will gain the necessary insight into the chapters of Science NCERT Solutions Class 9 Chapter 15: Improvement in food resources. Our subject matter experts provide detailed explanations and answers. The fascinating chapter on food resources explains many things. Initially, the chapter focuses on improvement in crop yields. Then, students will learn about different crops, which are the Rabi and Kharif crops, along with their seasons they are grown and harvested and nutritional values. 

Students can access our Extramarks NCERT Solutions for Class 9 Science Chapter 15. These solutions are updated and refined as per the latest CBSE curriculum and are thoroughly checked by the expert. All the  topics are  explained in detail  and are easy to understand. NCERT solutions for Class 9, Science Chapter 10, can help students understand  concepts that have been  illustrated  with examples. This will definitely help them to memorise and grasp better to get excellent results in the exam. .

Extramarks is one of the  most popular online learning platforms. Lakhs of students regularly refer to  Extramarks study materials. Our website offers a repository of resources  for students of  primary or secondary schools. . Students can also access other study materials and create their accounts. Students can easily follow our solutions, get detailed and authentic solutions without having to look anywhere else. Moreover, they can be accessed anywhere without much hassle. For the most recent exam-related news, students can visit our website. . Students can also consult NCERT solutions Class 10, NCERT solutions Class 11, and NCERT Solutions Class 12.

Key Topics Covered In NCERT Solutions for Class 9 Science Chapter 15:

NCERT Solutions for Class 9 Science Chapter 15 elaborates new terms and definitions related to food resources. Here, students will get to learn about different types of crops, such as the rabi crop and Kharif crop. In addition, students will understand crop variety, crop improvement and crop protection management. Furthermore, students will learn about animal husbandry in detail. Here, the features of cattle farming, egg and broiler production, and fish production are discussed extensively. 

Some of the key topics featured in NCERT solutions for Class 9 Science Chapter 15 are: 

1. Crop  Variety  Improvement

The selection process can enhance crop variety. Variety improvement can lead to higher yield, better quality, greater biotic and abiotic resilience, longer maturity durations, wider adaptability, and desirable agronomic characteristics. Hybridization is when two varieties cross, also known as intervarietal crossing or two genera crossing. The introduction of beneficial genes to the crop plant can increase crop output. Genetically engineered crops can be produced.

2. Crop Production Management

It is the protection of crops while they are growing or being harvested. You can increase crop output by improving nutrient management, irrigation, and cropping patterns.

A variety of agricultural practices are actions taken by farmers to produce crops. These are some of the agricultural methods elaborated in NCERT solutions Class 9 Science Chapter 15:

  • Preparing the soil
  • Sowing
  • Add fertilizers or manure
  • Irrigation
  • Weed defense
  • Harvesting
  • Storage

The quality of the soil, how good the seeds are, as well as the planting methods,   each will determine the strength of the final result. Potent hybrid seeds are better for corn because they can withstand extreme conditions and maximise yields. Although seed science technology has made great strides, there are still ways and methods to increase farm efficiency. These nutrients can be added as manure or fertilizers to the soil.

Fertilizers play a vital role in organic farming. To understand how fertilizers are used, students can refer to our NCERT solutions for Class 9 Science Chapter 15

3. Nutrient management

All three sources of nutrients are available to plants: soil, air, and water. Plants have two types of nutrients: micronutrients and macronutrients. Both carbon and oxygen can be supplied by air. Both water and hydrogen contain oxygen. The soil provides the 13 remaining nutrients. 

Nutritional deficiencies can affect the physiological activities of plants, including reproduction, growth, disease susceptibility, and disease susceptibility. Therefore, these nutrients can be added to the soil as manure or fertilizers to improve output.

To learn more about nutrient management, students can refer to our NCERT solutions for Class 9 Science Chapter 15. 

4. Manure 

When animal faeces  and plant waste  decompose , it breaks down into manure naturally.. It is rich in organic matter, which helps retain water in sandy soils while preventing waterlogging in clayey soils. Compost is made from vegetable and farm wastes and sewage waste. 

Vermicompost can be made by using earthworms to accelerate the process of decomposing plant and animal wastes through the vermicomposting process. Green manure is created by incorporating nitrogen- and phosphorus-rich plants into the soil before sowing seeds.

5. Fertilizers

Fertilizers are nutrients that provide potassium, phosphorus, and nitrogen to plants. Fertilizers are used to ensure healthy growth of plants  and good vegetative growth. High-cost farming yields higher yields because fertilizers are essential to that process. 

Organic farming is a method of agriculture that uses organic manures, reclaimed farm wastes, and bioagents. It uses minimal or no chemical fertilizers, herbicides, and insecticides. 

Various fertilizers help to protect crops. Therefore, students can study NCERT solutions for Class 9 Science Chapter 15. 

6. Cattle Farming 

Cattle farming serves two purposes. First, it produces milk and provides draught labour to perform agricultural tasks such as tiling and irrigation. Whole milk animals provide milk; draught animals can be used for farm labor. Bos Indicus, cows, and Bosbubalis (or buffaloes) are the most common Indian cattle species.

Cow management includes cleaning, sheltering, and feeding. Regular cleaning involves washing the cows daily to remove dirt and hair. Shelter facilities are well-ventilated roof sheds that keep cattle warm and dry. Two types of animal feed are available: Roughage feed (mostly fiber) and concentrate feed (which is high in protein and other nutrients but low in fiber).

7. Poultry Farming

Poultry farming refers to the practice of raising chickens for meat and eggs. Layers are used for eggs, and broilers are used for meat. Cross-breeding is standard in poultry to create new varieties with desirable characteristics. Cross-breeding is a common practice in poultry. For instance, Aseel, an Indian breed, has been crossed with Leghorn, a foreign species.

Cross-breeding allows for the generation of offspring with desirable traits. The desirable qualities of dwarf broilers include the ability to be used as meat in a shorter period, higher numbers and better quality chicks, and resistance against high summer temperatures.

To understand the fundamental  aspects  of poultry farming, the student can refer to NCERT solutions for Class 9 Science Chapter 15. 

8. Fish Production 

All types of fish can be canned, including real fish and shellfish like prawns or mollusks. There are two ways to get fish. First, you can catch fish. This is done using natural resources. Another option is fish farming, also known as culture fishing.

9. Bee-Keeping

The activity of keeping honeybee colonies in hives is known as bee-keeping. It is very affordable. Bee farms are often called apiaries. They produce honey for commercial use. Beehives also have wax that can be used in therapeutic compositions..

Apis cerana Indiana (Indian bee), Apis dorsata, Apis florea and Apis mellifera, are honey producers for commercial use. The honey’s quality and worth are determined by the pasture or the flowers that bees have access to for pollen and nectar gathering. To get more information on bee-keeping, students can refer to NCERT Solutions for Class 9 Science Chapter 15. 

NCERT Solutions for Class 9 Science Chapter 15: Exercise &  Solutions

NCERT solutions for Class 9 Science Chapter 15 and its exercise and answer solutions are available on the Extramarks website. It will help students understand the  right concept behind the questions in the exercise. Students will figure out how seasonal features were introduced to grow better crops and produce more harvest. Besides, the solutions cover all essential topics and provide step-by-step solutions. It helps students revise the complete syllabus with accurate and to the point answers without taking too much time as well as revise them quickly and easily to maximise their potential to get better    grades in their examinations. 

Class 9 Chapter 15 introduces crop variety improvement and emphasises various factors for which crop variety improvement is made. The solutions include complex topics such as nutrient management, irrigation, and cropping patterns are taken into consideration. It also consists of the concepts of crop protection management, which is explained by discussing the importance of pesticides, herbicides, insecticides, and fungicides. 

Students can refer below for specific exercise questions and solutions:

  • Chapter 15: Exercise 15.1 Solutions 2 Questions
  • Chapter 15: Exercise 15.2 Solutions 2 Questions
  • Chapter 15: Exercise 15.3 Solutions 2 Questions
  • Chapter 15: Exercise 15.4 Solutions 3 Questions
  • Chapter 15: Exercise 15.5 Solutions 4 Questions
  • Chapter 15: Exercise 15.6 Solutions 4 Questions
  • Chapter 15: Exercise 15.7 Solutions 4 Questions
  • Chapter 15: Exercise 15.8 Solutions 3 Questions
  • Chapter 15: Exercise 15.9 Solutions 2 Questions

Along with this, students can also refer to other solutions for primary and secondary classes:

  • NCERT Solutions Class 1
  • NCERT Solutions Class 2
  • NCERT Solutions Class 3
  • NCERT Solutions Class 4
  • NCERT Solutions Class 5
  • NCERT Solutions Class 6
  • NCERT Solutions Class 7
  • NCERT Solutions Class 8
  • NCERT Solutions Class 9
  • NCERT Solutions Class 10
  • NCERT Solutions Class 11
  • NCERT Solutions Class 12

NCERT Exemplar for Class 9 Science:

Science is a fascinating subject that teaches many new concepts. However, students often find it difficult to remember key concepts. Extramarks, one of the leading e-learning solutions, has made it possible through NCERT ememplar. Students can get the  answers for all the advanced level questions of each and every chapter. When students include NCERT Solutions and NCERT Exemplar in their study material, they can be rest assured that nothing remains untouched and every example solution, exercise has been covered in the chapter. Hence they are confident of their preparation to ace the exam with excellent results

NCERT exemplar introduces questions of a different difficulty level.  It contains multiple-choice questions. Fill in the blanks, and match pairs, true or false. Students can  practice a wide range of questions for a better learning experience. It also helps students to retain key concepts and definitions.The NCERT books are the basis of all questions in the CBSE annual exams. Therefore, students should have a solid knowledge of the NCERT exemplar. This will allow students to pass the most demanding and challenging  competitive exams.

These questions were taken from NCERT Solutions for Class 9 Science Chapter 15. This helps students understand the measures to take  for the protection and improvement of  the food resources. 

Key Features of NCERT Solutions for Class 9 Science Chapter 15:

NCERT Solutions for Class 9 Science Chapter 15 is an excellent way for students to understand the topics. The NCERT solutions are very helpful for students to understand concepts and help them plan their strategies to excel  in exams. Students will find Extramarks NCERT solutions a considerable advantage. 

These are the key concepts from NCERT Solutions for Class 9 Science Chapter 15: 

  • Students will be able to create considerable chunks of information to grasp the concepts quickly and easily..
  • These solutions are easily accessible online for students. They can access it anywhere as per their convenience.
  • .The NCERT solutions for class 9, Science chapter 15, are prepared by experts who understand how to explain concepts clearly to students. These  solutions will come handy during last minute preparation before exams. 
  • Students will find it easy to understand the concepts because it provides in depth explanation and solutions to exercise questions.   
  • The comprehensive and complete contents help students understand more complicated topics.
  • Students and teachers have complete faith and trust in solutions provided by Extramarks.
  • These solutions will give you an overview of the chapter and the key topics. They also guide  you to prepare for the exam to space your studies and use comparisons and analogies to make concepts memorable

Q.1 Explain any one method of crop production which ensure high yield.


Crop rotation is one of the methods of crop production that ensures high yield. In this method, two or more varieties of crops are grown on the same land in sequential seasons. Every crop has some specific requirement of nutrients from the soil. If the same crop is grown in the subsequent seasons in a particular field, the field will be deficient in those nutrients that are specifically required by the growing crop. To avoid this, crops having different nutrient requirements are grown in subsequent seasons. For example, legumes which have nitrogen fixing bacteria in their root nodules supply the soil with nitrogen. Therefore, these legumes are rotated with nitrogen requiring cereals such as wheat and maize. This method reduces the need of fertilisers, thereby increasing the overall yield of crops.

Q.2 Why are manure and fertilisers used in fields?


Manure and fertilisers are used in the field to enrich the soil with the required nutrients. Manure helps in enriching the soil with organic matter and nutrients whereas fertilisers add chemical substances that are rich in nitrogen, phosphorus and potassium. Adding fertilisers and manures improve the fertility and the structure of the soil and ensures a healthy growth and development in plants. It is advised to use a balanced combination of manure and fertilisers in the soil to get a good yield.

Q.3 What are the advantages of intercropping and crop rotation?


Intercropping and crop rotation both play an important role in increasing the yield of crops.

Advantages of intercropping:

  1. Prevents the pests and diseases to spread throughout the field,
  2. Maintains soil fertility,
  3. Reduces the use of fertilisers and
  4. Controls the growth of weeds

Advantages of crop rotation:

  1. Prevents soil depletion
  2. Increases soil fertility
  3. Reduces soil erosion,
  4. Reduces the use of fertilisers, and
  5. Controls the growth of weeds

Q.4 What is genetic manipulation? How is it useful in agricultural practices?


Genetic manipulation is a process where a foreign gene from one cell (for a particular character) is introduced into the chromosome of another cell. When the gene for a particular character is introduced in a plant cell, a transgenic plant is produced. These transgenic plants exhibit characters directed by the newly introduced genes.

For example, let us assume there is a wild plant that produces small flowers. If the gene responsible for larger flower size is introduced in this wild plant, this plant would become transgenic, and would produce larger flowers. Similarly genes for higher yield, disease resistance, etc can be introduced in any desired plant. Gene manipulations play following important roles in agricultural practices.

  1. Improves crop variety
  2. Ensures food security and insect resistant crops
  3. Improves the quality and yield of crops.

Q.5 How do storage grain losses occur?


Abiotic and biotic factors play a significant role in storage losses.

Abiotic factors such as moisture and temperature of the storage area and moisture content of the stored grain Biotic factors like insects, rodents, fungi, mites and bacteria. Both the factors cause degradation in quality, loss in weight and poor germinability of grains.

Q.6 How do good animal husbandry practices benefit farmers?


Good animal husbandry practices benefit farmers in the following ways:

  1. The economic value of the animals increases when proper shelter and protection from pests and diseases is given.
  2. Yield of animals produce such as meat, egg, milk, fur, etc increases when good animal husbandry practices are taken into consideration.
  3. Improved breeds of the animal are obtained by good animal husbandry practices.

Q.7 What are the benefits of cattle farming?


Cattle farming is one of the methods of animal husbandry that is most beneficial to the farmers. Benefits of cattle farming are;

  1. Quality and quantity of milk can be obtained
  2. New varieties that are resistant to diseases and are very robust to be used for agricultural work can be produced by crossing two varieties with the desired traits

Q.8 For increasing production what is common in poultry, fisheries and bee keeping?


For increasing production common activities in poultry, fisheries and bee keeping that should be followed are;

  1. Proper and regular cleaning of farms
  2. Providing good quality of nutritious food
  3. Proper care and protection from diseases and enemies (predators)

Q.9 How do you differentiate between capture fishing, mariculture and aquaculture?


Capture fishing



In this process, fish are obtained from natural water bodies like, rivers, lakes, ponds etc. In this process, fish are marine fish are cultured in open seas. This culture involves the production of aquatic animals of high economic value like prawns, lobsters, fishes, crabs etc.
In this process, fish are first located and then caught by using fishing net. In this process, echo-sounders and satellites are used to locate fish. After that fish are caught by using various fishing tools. In this process, animals are first located and then caught by using fishing net.

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FAQs (Frequently Asked Questions)

1. Which are essential topics covered in NCERT Solutions for Class 9 Science Chapter 15?

The chapter describes why the organism needs food to survive. It also discusses the various food sources and related topics   which include: 

  • Different types of crops, such as rabi crops and Kharif crop
  • Manure and fertilizers and organic farming
  • Crop protection management and organic farming
  • Improvement in crop yields
  • Animal husbandry

2. How to use NCERT Solutions for Class 9 Science Chapter 15 questions and answers effectively?

 Students can refer to our Extramarks NCERT Solutions for Class 9 Science Chapter 15. They can start from the essential topics which are easy to comprehend and practice the question and answer. In addition, students can analyze their responses and evaluate the scope for improvement. They need to clarify their concepts, know their grey areas and put a little extra effort to be strong in their subject.Further, they can also learn to refer to Extramarks  study material on the website. 

3. How is fish culture beneficial to humans?

Fish farming can be done for many reasons. Farmers can earn additional money by raising fish and improving their water management. Farmers can choose to increase the fish species they want to raise through aquaculture. It is time-saving to raise fish in ponds. Pond fishes can be  contributed by anyone, even though they are not easily accessible. Fish farming has made it possible to raise high-quality, protein-rich fishes that are affordable for everyone.