Class 9 NCERT Solutions Biology Chapter 15 - Improvements In Food Resources
Understand the concepts in your syllabus better with the NCERT Solutions for CBSE Class 9 Biology Chapter 15 Improvements in Food Resources. These are valuable reference materials available 24/7 at TopperLearning. You can refer to our solutions to learn about honey production, crop management, macronutrients, fertilisers and cross breeding.
Get insights on how a dairy is managed and what happens in poultry farming with our NCERT textbook solutions for CBSE Class 9 Biology. Also, understand composite fish culture with our chapter solutions and other learning materials such as online practice tests, concept videos and sample question papers.
Improvements In Food Resources Exercise 204
Solution 1
Fruits and vegetables provide us with a range of vitamins and minerals in addition to small amounts of proteins, carbohydrates and fats for proper growth and development of the body and maintenance of health.
Improvements In Food Resources Exercise 205
Solution 1
Solution 2
Improvements In Food Resources Exercise 206
Solution 1
Concept insight: Students get confused between macro and micro nutrients. Macro and micro does not mean that one is important and the other is not. Both the macro and micro nutrients are important. The difference between them is, one is required in large quantity and the other is required in less quantity.
Solution 2
Improvements In Food Resources Exercise 207
Solution 1
Manure | Fertilizer |
i. Manures are rich in organic matter and poor in nutrients. ii.Bulk of organic matter helps in increasing the soil fertility. iii.Organic matter increases the water holding capacity in sandy soil and also helps to avoid water logging in clayey soil. iv. Reduces soil erosion and provides food to the microorganims. |
i. Fertilizers are rich in nutrients and poor in organic matter. ii. Provides specific nutrients to the plants. iii. Excessive use of fertilizer destroys soil fertility because organic matter is not replenished and microorganisms are harmed. iv. Excess fertilizer gets washed away due to excessive irrigation and causes water pollution. |
Concept insight:
- Differences should always be written in tabular form.
- Differences should be written in terms of their significance.
- Write only those many numbers of differences as stated in the question.
- Give example wherever possible.
Improvements In Food Resources Exercise 208
Solution 1
Concept insight: Important from Exam point of view.
Improvements In Food Resources Exercise 209
Solution 1
Solution 2
Improvements In Food Resources Exercise 210
Solution 1
Improvements In Food Resources Exercise 211
Solution 1
Improvements In Food Resources Exercise 211 cont.
Solution 1
Solution 2
Broilers | Layers |
i.Broilers are maintained for getting meat. ii. They require conditions to grow fast and low mortality. iii. Their daily food requirement is rich in protein and vitamin A and K. The fat content also should be adequate.
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i.Layers are egg-laying birds managed for the purpose of getting eggs. ii. They require enough space and lighting. iii. They require restricted and calculated feed with vitamins, minerals and micronutrients.
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Concept insight:
- Differences should always be written in tabular form
- Differences should be written in terms of their significance.
- Write only those many numbers of differences as stated in the question.
- Give example wherever possible.
Improvements In Food Resources Exercise 213
Solution 1
Solution 2
Improvements In Food Resources Exercise 213 cont.
Solution 1
(ii) Sting less.
(iii) Stay in the beehive for longer periods and breed well.
Solution 2
Improvements In Food Resources Exercise 214
Solution 1
Solution 2
Solution 3
Advantages of Crop rotation:
Solution 4
Genetic manipulation helps in obtaining varieties with various desirable characteristics such as:
Concept insight: Students should not get confused between genetic manipulation and hybridization.
Improvements In Food Resources Exercise 215
Solution 5
Solution 6
Good animal husbandry practices benefit the farmers in the following ways:
Solution 7
Solution 8
Solution 9
Capture fishing | Mariculture | Aquaculture |
i.It is the process of obtaining fish from the natural resources like ponds, canals, rivers, etc. ii.In capture fishing, fish can be located easily and then caught using fishing nets. |
i.It is a practice of culture of marine fish varieties in the open sea. ii.In mariculture, satellites and echo-sounders are used for locating fish. Then, they are caught using many kinds of fishing nets from fishing boats. |
i.It means the production of fish from both fresh water as well as marine water. ii.Like capture fishing, in aquaculture also the fish can be located easily and are caught using fishing nets. |
Concept insight:
- Differences should always be written in tabular form.
- Differences should be written in terms of their significance.
- Write only those many numbers of differences as stated in the question.
- Give example wherever possible.