NCERT Class VIII Science Solutions: Chapter 1-Crop Production and Management Part 5

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Question 23:

Clasify the following crops into Khariff and Rabi crops and write in the tabular column given below:

Maize, paddy, mustard, pea, gram, wheat, groundnut, cotton.

Khariff and Rabi (Q)
Khariff and rabi (Q)

Khariff

Rabi

Answer:

Khariff and Rabi (A)
Khariff and rabi (A)

Khariff

Rabi

Maize

Mustard

Paddy

Pea

Groundnut

Wheat

Cotton

Gram

LONG ANSWER QUESTIONS

Question 24:

Despite favourable climatic conditions, a farmer’s crop failed to give good yield. Give the possible reasons for this.

Answer:

  1. He did not use good quality seeds.

  2. His field was not well irrigated.

  3. Manures/fertilisers were not properly applied.

  4. Weeds were not removed. More can be added to the list.

Question 25:

As a part of eco-club activity students were asked to raise a kitchen garden in the school premises. They were provided with some materials given in the box. List the other materials you would require. How will you plan the garden? Write the steps.

Khurpi, water-can, spade, shovel

Note: You have been asked to use only environment friendly materials.

Answer:

The following items are required – seeds and seedlings of vegetable plants from nursery, kitchen waste, water.

Steps for raising the garden:

  1. Kitchen waste will be collected and composted in a pit.

  2. A patch of land will be identified for the garden.

  3. Soil will be dug up and levelled with the help of a spade.

  4. Sowing of seeds / transplanting of seedlings.

  5. Select seeds/seedlings as per the season. Water the plants regularly with a water-can.

  6. Compost will be applied.

  7. Weeds will be removed periodically with the help of Khurpi.

Question 26:

Paddy is a major cereal crop in our country.

  1. In which season is paddy cultivated?

  2. Discuss the method of sowing.

  3. What measures must be taken to prevent spoilage and insect attack of harvested grains.

Answer:

  1. Paddy is cultivated in rainy season as it is a kharif crop.

    Image of kharif crops

    Image of Kharif Crops

    Image of kharif crops

  2. Seeds are first grown in a nursery and later seedlings are transplanted in the field.

  3. Grains are sun dried to reduce the moisture content and later stored in jute bags or grain silos