NCERT Exemplar solutions for Science [English] Class 9 chapter 15 - Improvement In Food Resources [Latest edition]

Which one is an oil yielding plant among the following?

Which one is not a source of carbohydrates?

Find out the wrong statement from the following

To solve the food problem of the country, which among the following is necessary?

Find out the correct sentence

1. Hybridisation means crossing between genetically dissimilar plants
2. Cross between two varieties is called as interspecific hybridisation
3. Introducing genes of the desired character into a plant gives genetically modified crop
4. Cross between plants of two species is called inter varietal hybridisation

Weeds affect the crop plants by

Which one of the following species of the honey bee is an Italian species?

Find out the correct sentence about manure

1. Manure contains large quantities of organic matter and small quantities of nutrients.
2. It increases the water-holding capacity of sandy soil.
3. It helps in draining out an excess of water from clayey soil.
4. ts excessive use pollutes the environment because it is made of animal excretory waste.

Cattle husbandry is done for the following purposes

1. Milk Production
2. Agricultural work
3. Meat production
4. Egg production

Which of the following are Indian cattle?

1. Bos indicus
2. Bos domestic
3. Bos bubalis
4. Bos vulgaris

Which of the following are exotic breeds?

1. Brawn
2. Jersey
3. Brown Swiss
4. Jersey Swiss

Poultry farming is undertaken to raise the following

1. Egg production
2. Feather production
3. Chicken meat
4. Milk production

Poultry fowl are susceptible to the following pathogens

Which one of the following fish is a surface feeder?

Animal husbandry is the scientific management of

1. animal breeding
2. culture of animals
3. animal livestock
4. rearing of animals

Which one of the following nutrients is not available in fertilizers?

Preventive and control measures adopted for the storage of grains include

Match column A with the column B

Pigeon pea is a good source of ______.

Berseem is an important ______ crop.

The crops which are grown in the rainy season are called ______ crops.

______ are rich in vitamins.

______ crop grows in winter season.

______ nutrients are needed in small quantity for plants and are called ______.

What is a GM crop? Name anyone such crop which is grown in India.

List out some useful traits in the improved crop?

Why is organic matter important for crop production?

Why is excess use of fertilizers detrimental to the environment?

Farming without the use of chemicals such as fertilizers, herbicides and pesticides is known as ______.

Growing wheat and groundnut on the same field is called ______.

Planting soybean and maize in alternate rows in the same field is called ______.

Growing different crops on a piece of land in pre-planned succession is known as ______.

Xanthium and Parthenium are commonly known as ______

Causal organism of any disease is called as ______.

Match the following A and B

If there is low rainfall in a village throughout the year, what measures will you suggest to the farmers for better cropping?

Group the following and tabulate them as energy-yielding, protein yielding, oil yielding and fodder crop.

Wheat, rice, berseem, maize, gram, oat, pigeon gram, sudangrass, lentil, soybean, groundnut, castor and mustard.

Define the terms hybridization and photoperiod.

Photoperiod affect the ______.

Kharif crops are cultivated from ______ to ______.

Rabi crops are cultivated from ______to______.

Paddy, maize, green gram and black gram are ______ crops.

Wheat, gram, pea, mustard are ______ crops.

Cultivation practices and crop yield are related to environmental conditions. Explain.

A total of ______ nutrients are essential to plants.

______ and ______ are supplied by air to plants.

______ is supplied by water to plants.

Soil supply ______ nutrients to plants.

______ nutrients are required in large quantity and called as ______.

Differentiate between compost and vermicompost?

Differentiate between compost and vermicompost?

Arrange these statements in the correct sequence of preparation of green manure.

(a) Green plants are decomposed in soil.

(b) Green plants are cultivated for preparing manure or crop plant parts are used.

(c) Plants are ploughed and mixed into the soil.

(d) After decomposition it becomes green manure.

An Italian bee variety A. mellifera has been introduced in India for honey production. Write about its merits over other varieties.

In agricultural practices, higher input gives a higher yield. Discuss how?

Discuss the role of hybridisation in crop improvement.

Define Vermicompost

Define Green manure

Define Biofertilizer

Discuss various methods for weed control.

Differentiate between the following

Capture fishery and Culture fishery

Differentiate between the following

Mixed cropping and Intercropping

Differentiate between the following

Beekeeping and Poultry farming

Give the merits and demerits of fish culture?

What do you understand by composite fish culture?

Why beekeeping should be done in good pasturage?

Write the modes by which insects affect the crop yield.

Discuss why pesticides are used in very accurate concentrations and in a very appropriate manner?

Name two types of animal feed and write their functions.

What would happen if poultry birds are larger in size and have no summer adaptation capacity? In order to get small sized poultry birds, having summer adaptability, what method will be employed?

Suggest some preventive measures for the diseases of poultry birds

Figure15.1 shows the two crop fields [Plots A and B] have been treated by manures and chemical fertilizers respectively, keeping other environmental factors the same. Observe the graph and answer the following questions.

(i) Why does plot B show a sudden increase and then a gradual decrease in yield?

(ii) Why is the highest peak in plot A graph slightly delayed?

(ii) What is the reason for the different patterns of the two graphs?

Across

1. Oil yielding plant (9)

3. Crop is grown in the winter season (4)

5. Fixed by Rhizobium (8)

9. Common honey bee (4)

Downward

2. Animal feed (6)

4. A micronutrient (5)

6. Unwanted plant in crop fields (4)

7. An exotic breed of chicken(7)

8. Bottom feeders in the fish pond(7)

10. A marine fish (4)