CBSE Class 8 Science Crop Production And Management Assignment Set A

1.Why storage of food is done?

2.Write any two sources of irrigation?

3.What are the two common forms by which we add nutrients in soil?

4.What do you mean by seed drill?

5.What is sowing?

6.Why we use tractor driven cultivator for ploughing now a days?

7.Name the vitamin found in cod liver oil:

(A) Vitamin A (B) Vitamin B (C) Vitamin C (D) Vitamin D

8.How are disease transmitted in plants?

9.Name two common examples of agricultural crops.

10.What is agriculture?

11.What is crop?

12.The plants of same kind grown at a place is referred to as

(A) garden (B) agriculture (C) crop (D) all of the above

13.Fertilisers are used to improve crop yield because they

(A) are rich in inorganic nutrients (B) are rich in organic nutrients.

(C) are rich in organic and inorganic nutrients. (D) all of the above

14.Continuous growing of crops make the soil poorer and less-fertile, we can replenish soil by following method

(A) using manure (B) using fertilizers (C) by crop-rotation (D) all of the above

15.Removal of weeds is necessary for plant growth because

(A) weeds compete with crop for nutrition (B) weeds interfere in harvesting

(C) weeds may be poisonous (D) all of the above

16.Ploughs are used for:

(A) Harvesting (B) Tilling (C) Irrigation (D) Sowing

17.Frequency of wateringshould behigher in summer season due to:

(A) Increased evaporation from soil (B) Decreased evaporation from soil

(C) Decreased rainfall (D) None of the above

18.Which of the following organism is a friend of farmer?

(A) Earthworm (B) Cockroaches (C) Rats (D) Grasshoppers

19.What is the first step before growing a crop?

(A) Irrigation (B) Harvesting (C) Sowing (D) Soil preparation

20.Big pieces of soil are called:

(A) crumbs (B) silos (C) Weeds (D) Stones

21.Decomposed matter is used as:

(A) Fertiliser (B) Manure (C) Weedicide (D) Pesticides

22.Which of the following does not provide any humus to the soil?

(A) Manure (B) Fertiliser (C) Both of them (D) None of them

23.Which of the following is not the function of manures?

(A) to enhance the water holding capacity of the soil.

(B) to improve soil texture.

(C) to provide inorganic nutrients to the soil.

(D) to provide organic nutrients to the soil.

24.Which of the following is not the source of energy for pumps?

(A) Diesel (B) Biogas (C) Electricity (D) Coal

25.Process of separation of grain and chaff is called:

(A) Sowing (B) Winnowing (C) Ploughing (D) Harvesting

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