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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.
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.
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.
Answer:
Desirable agronomic traits to improve crops are:
- Height and profuse branching in useful plants such as fodder.
- Dwarfism in Cereals.
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.
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.
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.
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.
- If a farmer uses good quality seeds, then there are chances for almost all the seeds to germinate.
- Proper irrigation improves the availability of water to the crops.
- Fertilizers are responsible for healthy growth and development among plants as they provide essential nutrients e.g. phosphorus, nitrogen, potassium, etc.
- Crop protection measures include methods like control of weeds, pests, and infectious agents. So, improves crop productivity.
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.
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.
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.
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-
- A clean and adequate shelter.
- Hygienic and nutritionally adequate food.
- A well-ventilated space.
- Vaccination for prevention of diseases.
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
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".
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.
Answer:
The advantages of composite fish culture are given below:
- In a single water source, 5 or 6 types of fish species can be cultured as they are non-competitive for food.
- The survival rate of the fish increases
- More yield of fish can be obtained
Answer:
The following are the desirable characteristics of bee varieties suitable for honey production:
- Bees are said to produce large quantities of honey and wax.
- Bees should reside in their hives for a long time.
- Bees should breed well.
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.
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.
Answer:
Manure and fertilizers are used in the fields:
- To provide essential nutrients to the soil
- To enhance soil fertility
- To ensure productive vegetative growth for high crop yield
Answer:
The advantages of inter-cropping are:
- It prevents soil erosion.
- It adds nutrients to the main crop.
- It reduces the dependence on fertilizers which are harmful.
The advantages of crop rotation are:
- It helps in returning nutrients to the soil.
- It interrupts the cycles of pests.
- It improves soil fertility by increasing biomass by increasing biodiversity on the farm.
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:
- It helps to improve crop variety.
- It ensures food security and the production of insect-resistant crops.
- It also improves the quality and yield of crops.
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.
Answer:
The benefits of animal husbandry practice for farmers include:
- It improves breeding style.
- It increases the yields of many products like milk, meat, eggs, etc.
- It helps farmers to manage different tasks for animals like feeding, sheltering and protecting them against diseases by vaccination.
Answer:
The benefits of keeping cattle include:
- Higher quality and quantity of milk can be produced.
- Draught labor animals, like ox, can be produced for fieldwork.
- The waste generated by the drought labor animals can be used as manure to increase soil fertility.
- Disease-resistant varieties can be produced by the cross-breeding method.
- A load of labor animals can be minimized by the methods like tilling, irrigation, and carting.
- It is a good source of employment and can generate a good income to support.
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.
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
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:
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