Class 8 Science - Chapter Crop Production and Management NCERT Solutions | What is irrigation? Describe two methods
What is irrigation? Describe two methods of irrigation which conserve water.
Irrigation: The process of watering the crops at different intervals is called irrigation. The time and frequency of irrigation varies from crop to crop, soil to soil and seasons to seasons. Two methods of irrigation that conserve the water are as follows:
- Sprinkler system: This method is used in mainly uneven or irregular shape land where sufficient water is not available or shortage of water occurs. The perpendicular pipes that contains rotating nozzles on the top, are joined to the main pipeline at regular intervals. When water is allowed to flow through the main pipe under pressure with the help of a pump then it escapes from the rotating nozzles. It gets sprinkled on the crop as like it is raining.
- Drip irrigation: In this system, a network of narrow pipes or tubes is laid down in the field with small holes. When water flows through the narrow pipes, it falls drop by drop just near the roots of the plants. In this method, there is no wastage of water occurs as the water falls down drop by drop, therefore this system of irrigation is very useful in those regions where availability of water is poor. It is the best technique for watering the fruit plants, gardens and trees.
More Questions From Class 8 Science - Chapter Crop Production and Management
- Q:-
Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.
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Complete the following word puzzle with the help of clues given below.
Down
1. Providing water to the crops.
2. Keeping crop grains for a long time under proper conditions.
5. Certain plants of the same kind grown on a large scale.Across
3. A machine used for cutting the matured crop.
4. A rabi crop that is also one of the pulses.
6. A process of separating the grain from chaff.
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If wheat is sown in the kharif season, what would happen? Discuss.
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Write a paragraph in your own words on each of the following.
(a) Preparation of soil (b) Sowing
(c) Weeding (d) Threshing - Q:-
Explain how fertilisers are different from manure.
- Q:-
Match items in column A with those in column B.
A B
(i) Kharif crops (a) Food for cattle
(ii) Rabi crops (b) Urea and super phosphate
(iii) Chemical fertilisers (c) Animal excreta, cow dung urine and plant waste
(iv) Organic manure (d) Wheat, gram, pea
(e) Paddy and maize - Q:-
Give two examples of each.
(a) Kharif crop
(b) Rabi crop - Q:-
Explain how soil gets affected by the continuous plantation of crops in a field.
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- Q:-
Select the correct word from the following list and fill in the blanks.
float, water, crop, nutrients, preparation(a) The same kind of plants grown and cultivated on a large scale at a place is called _____________.
(b) The first step before growing crops is _____________ of the soil.
(c) Damaged seeds would _____________ on top of water.
(d) For growing a crop, sufficient sunlight and _____________ and _____________ from the soil are essential.
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Fill in the blanks
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- Q:-
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(a) A plastic scale
(b) A copper rod
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(b) Species found only in a particular area is known as .
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Across
1. This is necessary for photosynthesis.
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