NCERT Class-9 Science Solutions: Chapter 15-Improvement In Food Resources Part 5

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Question 25:

Match the following A and B

Match the Following a and B (Q)
Match the following A and B (Q)

A

B

Cattle used for tilling and carting

Milk producing female

Indian breed of chicken

Broiler

Sahiwal, Red Sindhi

Drought animals

Milch

Local breed of cattle

Chicken better fed for obtaining meat

Aseel

Answer:

Match the Following a and B (A)
Match the following A and B (A)

A

B

Cattle used for tilling and carting

c Drought animals

Indian breed of chicken

e Aseel

Sahiwal, Red Sindhi

d Local breed of cattle

Milch

a Milk producing female

Chicken better fed for obtaining meat

b Broiler

Question 26:

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

Answer:

If there is low rainfall in a village throughout the year, the farmers need to take necessary measures responsible for water conservation. Following are some suggestions which may be helpful to farmers.

1) Farmers should cultivate those crops, which are drought resistant and early maturing. These crops will consume less water and would be beneficial for farmers.

2) Farmers should use organic manure and humus so that these will increase the water holding capacity of soil for the longer time period.

3) If there are rivers in that particular region then the farmers can construct short canals from the rivers and use that water for irrigation.

4) Farmers should conserve rain water through building water storage tanks so that every drop of rain water is conserved for the future use.

5) Farmers should use traditional methods of irrigation involving different ways of obtaining water from wells, lakes and canals and transporting it to the fields with the help of cattle or by human labour

Question 27:

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

Wheat, rice, berseem, maize, gram, oat, pigeon gram, Sudan grass, lentil, soyabean, groundnut, castor and mustard.

Answer:

These are as given,

  1. Energy yielding— wheat, rice, maize, oat

  2. Protein yielding— gram, pigeon gram, lentil, soybean

  3. Oil yielding— groundnut, castor, mustard, soybean

  4. Fodder crops— Berseem, Sudan grass

Question 28:

Define the term hybridization and photoperiod.

Answer:

Hybridization: Hybridization refers to crossing between genetically dissimilar organisms.

Image the hybridization

Image the Hybridization

Image the hybridization

Photoperiod: Duration of sunlight available to the plant is called as photoperiod. It affects the growth, flowering and maturation of crops.

Image the Photoperiod

Image the Photoperiod

Image the Photoperiod

Question 29:

Fill in the blanks

  1. Photoperiod affect the____________.

  2. Kharif crops are cultivated from____________to____________.

  3. Rabi crops are cultivated from____________to____________.

  4. Paddy, maize, green gram and black gram are____________crops.

  5. Wheat, gram, pea, mustard are____________crops.

Answer:

  1. Photoperiod affect the flowering of plants.

  2. Kharif crops are cultivated from June to October.

  3. Rabi crops are cultivated from November to April.

  4. Paddy, maize, green gram and black gram are Kharif crops.

  5. Wheat, gram, pea, mustard are Rabi crops.

Question 30:

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

Answer:

Different crops and cultivation practices require different climatic conditions, temperature, photoperiod for their growth and completion of life cycle. There are some crops which are grown in rainy season (Kharif crops) while some others are grown during winter season (Rabi crops).

Image the kharif crops and Rabi crops

Image the Kharif Crops and Rabi Crops

Image the kharif crops and Rabi crops