Protection Methods against Weeds

Q.

Weeds affect the crop plants by:

1. killing of plants in the field before they grow

2. dominating the plants to grow

3. competing for various resources of crops (plants) causing low availability of nutrients

4. all of the above

Q.

Describe the biological method of weed control.

Q.

Explain various methods of weed control.

Q. What are the preventive methods used to avoid the growth of weeds?

1. Proper seed bed preparation
2. Timely sowing of crops
3. Intercropping
4. Crop rotation.

Q. Chemicals used to kill the weeds are .

1. weedicides
2. insecticides
3. fungicides

Q.

Weeds affect the crop plants by

1. killing of plants in field before they grow

2. dominating the plants to grow

3. competing various resources of crops (plants) causing low availability of nutrients

4. all of the above

Q.

Question 38
Discuss various methods for weed control.

Q.

Question 38
Discuss various methods for weed control.

Q.

Give an example of biological weed control.

Q.

list the important preventive measures to control weeds

Q.

What are weeds? Name two common weeds found in India.

Q.

What are weedicides?

Q. Match the correct pairs regarding methods of weed control.

1. Preventive Method
2. Chemical Method
3. Crop Manangement

Q.

Which of the following methods can be used to control the growth of weeds on the fields?

1. Lagoons

2. Estuaries

3. Rivers

4. All of these

Q.

Which of the following methods can be used to control the growth and removal of weeds on the fields?

1. Lagoons

2. Estuaries

3. Rivers

4. All of these

Q.

Which of the following methods can be used to control the growth of weeds on the fields?

1. Excess use of water
2. Crop rotation
3. Intercropping
4. Excess use of chemicals

Q.

Given below are statements about the harmful effects of weeds on crop plants.
(i) They interfere while harvesting.
(ii) They help crop plants grow healthily.
(iii) They compete with crop plants for water, nutrients, space, and light.
(iv) They affect plant growth.

Choose the correct statements from above. Which among them is true?

1. (i), (iii) and (iv)

2. (iii) only

3. (iii) and (iv)

4. (i), (ii), (iii) and (iv)

Q. The chemical by which weeds are removed from the farm land is called as:

1. pesticide
2. insecticide
3. weedicide
4. herbicide

Q.

Briefly describe weeds.

Q. Chemicals used to kill the weeds are .

1. weedicides
2. insecticides
3. fungicides

Q.

Explain various methods of weed control.

Q. The ash of the weeds are spread on the soil to increase its

1. Fertility
2. Porosity
3. Salt retention capability
4. Both A and B

Q. Undesirable plants growing along with the crops are termed as _____ .

1. Hybrids
2. Weeds
3. Fruits
4. Legumes

Q. The unwanted plants that grow in a crop field are known as

1. Seeds
2. Weeds
3. Fruits
4. Flowers

Q.

Which of the following methods can be used to control the growth of weeds on the fields?

1. Lagoons

2. Estuaries

3. Rivers

4. All of these

Q. Consider the following statements about weeding and identify the incorrect one.

1. Weeding is best done during tilling itself.
2. Weeding is the process of growing weed.
3. Weeding is the process of removal of weeds.
4. Weeding is usually done manually or using weedicides.

Q. Why is chemical treatment required for storing large quantities of grains?

1. To select good quality seeds.
2. To prevent absorption of excess moisture.
3. To protect them from fungal contamination.
4. To protect them from pests.

Q.

Which of the following method(s) can be used to control the growth of weeds in the fields?

1. Excess use of water

2. Use of weedicides

3. Intercropping

4. Use of pesticides

Q. The agricultural instrument used for removing weeds is __________.

1. funnel
2. seed drill
3. plough
4. khurpi

Q. Consider the following statements about weeding and identify the incorrect one.

1. Weeding is best done during tilling itself.
2. Weeding is the process of growing weed.
3. Weeding is usually done manually or using weedicides.
4. Weeding is the process of removal of weeds.