Page 14 - Science Class 08

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A. Tick (3) the correct op on.
1. Which of the following is not a cereal crop?

(a) Rice (b) Maize
(c) Gram (d) Barley
2. Which of the following is not a part of crop produc on?
(a) Selec on of seeds (b) Manuring

(c) Water harves ng (d) Weeding
3. Which of the following is not the most widely used mineral to improve the
fer lity of the soil?
(a) Phosphorus (b) Potassium

(c) Nitrogen (d) Calcium
4. Which of the following methods is used to remove harmful and unwanted plants?
(a) Compos ng (b) Winnowing

(c) Weeding (d) Irriga ng
5. Which of the following crops is grown in kharif season?
(a) Rice (b) Wheat
(c) Millet (d) Jute

B. Match the following columns.
Column I Column II
1. Kharif crops a. Food for ca le
2. Rabi crops b. Urea and super phosphate
3. Chemical fer lizers c. Animal excreta, cow dung, urine and plant waste
4. Organic manure d. Wheat, gram, pea
C. Fill in the blanks.

1. ___________ are the most important part of our food because they contain adequate
amount of energy.
2. Seeds should not be kept in excessive ___________ or moisture before sowing.

3. The nutrients include mainly _____________ which are required by plants for their proper
growth.
4. Extremes of ______________ , stray animals, pests and ______________ are chief dangers
for the crops.
5. Harves ng is manually done by using ______________ .
D. Give two examples of each.

1. Kharif crops ______________ ______________
2. Rabi crops ______________ ______________
E. Write a paragraph in your own words on each of the following.
1. Prepara on of soil 2. Sowing
3. Weeding 4. Threshing

14 Science-8