NCERT Solutions for Class 9 Science Chapter 12 Improvement in Food Resources provide complete and accurate answers to all in-text and exercise questions. This chapter focuses on methods to improve food production and quality.
By using NCERT Solutions for Improvement In Food Resources Class 9 Science, students can understand key concepts clearly, prepare effectively for CBSE exams, and strengthen their problem-solving skills. The solutions are designed to help students grasp the fundamental principles of food resource management and adopt scientific and sustainable practices in agriculture and allied sectors.
What is Improvement in Food Resources?
Improvement In Food Resources Class 9 Chapter 12 focuses on how to improve the production and quality of food. It covers various methods and practices used in agriculture and animal husbandry to increase food supply. The chapter discusses the role of modern farming techniques, crop rotation, and the use of fertilizers and pesticides.
Class 9 Improvement In Food Resource highlights sustainable practices and the importance of ensuring food security for growing populations. Through practical examples and concepts, the chapter aims to provide students with a clear understanding of how food resources can be improved to meet global needs.
Improvement In Food Resources Class 9 Questions And Answers
Improvement in Food Resources Class 9 Questions and Answers help students understand how food production can be increased through scientific methods and sustainable practices. The questions and answers explain these concepts in a simple manner. This helps students grasp the importance of improving food resources to meet the growing population’s needs.
Improvement in Food Resources Class 9 Questions and Answers are given here. These NCERT solutions are useful for exam preparation:
Class 9 Improvement In Food Resources Question Answers Page: 141
Q1. What do we get from cereals, pulses, fruits, and vegetables?
Ans:
Carbohydrates are the primary source of energy found in cereals.
Protein from pulses is necessary for development and growth.
Fruits and vegetables are rich sources of vitamins, minerals, carbs, proteins, and fats that are necessary for general development.
In-text 1.2 Page Number: 142
Q1. How do biotic and abiotic factors affect crop production?
Ans:
Two main elements are influencing the crop:
Insects, rodents, pests, and a host of other biotic factors lower crop productivity and propagate disease. The crop that is raised is destroyed by abiotic variables such as humidity, temperature, moisture, wind, rain, flood, and many more.
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 1.3 Page Number: 143
Q1. What are macro-nutrients, and why are they called macronutrients?
Ans:
Plants consume macronutrients, which are the basic components, in greater quantities. The macronutrients that plants require include
• Protoplasmic constituents as macronutrients.
• Proteins contain phosphorus, nitrogen, and sulfur.
There is calcium in the cell wall.
• A substantial part of chlorophyll is magnesium.
Q2. How do plants get nutrients?
Ans:
Plants need 16 fundamental nutrients to grow. Water provides carbon and oxygen, while the soil provides the other nutrients.
In-text 1.4 Page Number: 144
Q1. Compare the use of manure and fertilizers in maintaining soil fertility.
Ans:
Manure adds nutrients to the soil, improving its quality. By adding additional organic matter, or humus, to the soil, manure improves drainage in clayey soils and the ability of sandy soils to retain water. Soil erosion is lessened by manures. They give soil-friendly bacteria food, which aids in crop growth.
The effects of fertilizers are:
Fertilizers accelerate soil erosion by making the soil too dry and powdery. Because the soil's porosity reduces as organic matter levels rise, plant roots are unable to receive enough oxygen. Soil composition varies, becoming either basic or acidic.
In-text 1.5 Page Number: 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.
Ans:
The best results will come from option (c), as using high-quality seeds alone won't be enough until the soil is adequately irrigated, fertilized, and shielded from biotic influences.
In-text Question 1.6 Page Number: 146
Q1. Why should preventive measures and biological control methods be preferred for protecting crops?
Ans:
Since excessive chemical exposure causes environmental issues, biological approaches are recommended to protect crops from pests, diseases, and rodents while also boosting yield. Bio-pesticides are a safe alternative to chemical pesticides for protecting crops because the former harms both plants and the animals that consume them.
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
-
Rodents
-
Pests
-
Insects
-
Fungi
-
Bacteria
-
Sunlight
-
Flood
-
Rain
-
Temperature
-
Moisture
Class 9 Improvement In Food Resources Question Answers In-text 1.7 Page Number: 147
Q1. Which method is commonly used for improving cattle breeds and why?
Ans:
In general, the best technique used to raise the caliber of cow breeds is cross-breading. Using this technique, a new, improved variety of cattle breeds or progeny is produced from breeding two excellent cattle breeds. When breeding, attention is taken to produce a high-yielding, high-quality offspring that is resistant to weather.
In-text Question 1.8 Page Number: 148
Q1. What management practices are common in dairy and poultry farming?
Ans:
A well-thought-out, hygienic shelter for poultry and birds of prey. Dairy animals, poultry, and birds are given proper, high-quality food and fodder. significance for the prevention and treatment of bacterial, viral, or fungal diseases in animals. Animal shelter that is feasible for sunlight and has good ventilation.
Q2. What are the differences between broilers and layers and their management?
Ans:
Broilers
A grill is a type of poultry bird produced for meat. Broilers are fed diets high in protein and low in fat. Poultry feeds are maintained to have high levels of vitamins A and K.
Layers
A layer is a type of poultry bird that lays eggs. Broilers have different housing, environmental, and dietary needs than egg layers. Enough room and adequate illumination are necessary for layers.
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.”
Ans:
Raising domestic birds for eggs and chicken meat is the goal of poultry farming. Animal feed, primarily roughages for high-quality feathers, eggs, poultry, and nutrient-rich dung, is what these domestic birds eat. According to some, poultry "is India's most efficient converter of low-fiber foodstuff into highly nutritious animal protein food" because of these factors.
In-text Question 1.9 Page Number: 150
Q1. How are fish obtained?
Ans:
Fishes are obtained in two ways:
Capture fishing: Obtaining fish from natural resources.
Culture Fishery: Culturing of fishes in freshwater ecosystems, like rivers, ponds, and lakes, also including marine.
Q2. What are the advantages of composite fish culture?
Ans:
The benefits of raising fish in composite cultures are
Five or six different species of fish can be raised in a single fish pond since they do not compete with one another for food. Food resources are fully utilizeable. Fish survival rates also rise. Greater yield
Q3. What are the desirable characteristics of bee varieties suitable for honey production?
Ans:
-
The variety of bees should yield a large amount of honey.
-
The bees should stay for a longer period in bee hives.
-
The bees should not sting much.
-
Bees should be disease-resistant.
Q4. What is pasturage, and how is it related to honey production?
Ans:
Pasturage is the term used to describe flowers that are easily accessible to bees to collect nectar and pollen. The taste of honey is largely determined by the types of flowers that are accessible; therefore, pasturage is the primary factor in high-quality honey.
Improvement In Food Resources Class 9 Extra Questions And Answers Page Number: 151
Q1. Explain any one method of crop production which ensures high yield.
Ans:
One technique used for high-yield plant breeding is plant breeding, which is done to enhance crop types through plant breeding. Plants with desired traits are selected from a variety of locations, and then hybridization or cross-breeding is carried out among these diversities to produce a crop or plant with the desired qualities.
Q2. Why are manure and fertilizers used in fields?
Ans:
Fertilizers and manures are applied to the soil to increase its quality and increase output. They aid in the management of illnesses as well. By adding nutrients to the soil, manure, and fertilisers restore the soil. They are great providers of nitrogen, phosphorus, and potassium, all of which are necessary for plants to grow healthily. The major ways to increase soil fertility are through manures and fertilizers.
Q3. What are the advantages of inter-cropping and crop rotation?
Ans:
Inter-cropping
-
Checks pests and rodents and hence decreases the chances of the spoiling of whole crops
-
Decreased chances of soil erosion
-
Reduced loss of crops with high yield
-
Less water requirement
Crop rotation
-
Farmers can grow two or three crops annually
-
Pulses take nitrogen directly from the atmosphere and hence require a minimal amount of fertilisers
-
Both fruits and vegetables can be grown easily
-
Best use of land with a proper supply of nutrients
Q4. What is genetic manipulation? How is it useful in agricultural practices?
Ans:
Genes are transferred from one organism to another through a technique known as genetic manipulation. In this case, a transgenic plant is created by introducing a gene with a specific character inside the chromosomal cell.
For instance, the genetically engineered crop known as "BT Cotton" has bacterial genes that shield the plant against insects. These serve as insect protection for crops such as corn, rice, cauliflower, brinjal and cabbage.
Q5. How do storage grain losses occur?
Ans:
Storage grain losses occur due to various abiotic and biotic factors.
Abiotic factors
-
Humidity
-
Air
-
Temperature
-
Flood
-
Wind
Biotic factors
-
Insects
-
Rodents
-
Pesticides
-
Bacteria
-
Mites
-
Birds
Q6. How do good animal husbandry practices benefit farmers?
Ans:
Good practice of animal husbandry benefits farmers in the following ways:
-
Yields in good quality cattle
-
Better quality of milk production
-
Use in agriculture for carting, irrigation and tilling
Q7. What are the benefits of cattle farming?
Ans:
The advantages of raising cattle are
Agricultural uses for cattle exist. Production of superior livestock Meat and milk production The leather and wool industries require cattle skins.
Q8. For increasing production, what is common in poultry, fisheries and bee-keeping?
Ans:
Cross-breeding techniques are utilised in beekeeping, fishing, and poultry to increase productivity. Regular and appropriate maintenance procedures are helpful in enhancing productivity in addition to these strategies.
Q9. How do you differentiate between capture fishing, mariculture and aquaculture?
Ans:
Fish are caught with the capture fishing technique in a variety of natural resource sources, including lakes, ponds, rivers, and the sea.
Fish culture in marine environments, such as mullets, prawns, oysters, and bhetki, is done for commercial purposes.
Fish are cultured in freshwater and marine environments through the process of aquaculture.
Improvement In Food Resources Class 9 PDF
Improvement In Food Resources Class 9 PDF provides all the important questions and answers from the chapter Improvement in Food Resources, strictly based on the latest CBSE syllabus. The answers are well-structured, easy to revise, and suitable for quick exam preparation.
It helps students strengthen their understanding of agricultural practices, modern farming techniques, and food resource management. Below is the PDF for download: