Weeding

Q.

Write a short note on weeding.

Q. The process of removal of unwanted plants is known as _____.

1. winnowing
2. sowing
3. weeding
4. ploughing

Q. What are the different weed removal methods?

Q. Chemicals used to control weeds are known as ______.

1. insecticides
2. weedicides
3. fungicides
4. pesticides

Q.

What are pests? How do they attack the crops?

Q. Which of the following are used for weeding?

Q. The process of removal of unwanted plants growing along with the crops is known as:

1. Winnowing
2. Ploughing
3. Weeding
4. Sowing

Q. 2, 4-D is an example of weedicide.

1. True
2. False

Q. How can we control the weeds ?

Q.

Weeding is necessary because ___ .

1. weeds are poisonous

2. weeds interfere in crop harvesting

3. weeds compete with crop plants for nutrition and space

4. all the above

Q. The process of removing weeds is called harvesting.

1. True
2. False

Q. What are the challenges of storage of crops faced by the farmers? [3 marks]

Q. Weeds are removed manually with the help of a ____________.

1. hoe
2. plough
3. leveller
4. khurpi

Q. What are the weeds? How can we contract weeds.Explain its method.

Q.
What are weeds? Name any two common weeds and state why it is important to remove weeds from the fields.

Q. _____________ is the removal of unwanted plants growing along with the crops.

1. Sowing
2. Ploughing
3. Weeding
4. Levelling

Q. Which of the following is/are used for weeding?

1. Leveller
2. Weedicides
3. Weed harrow
4. Seed drill

Q. Weedicides help in crop production by killing unwanted plants in the crop field.

1. False
2. True

Q. (b) How do weeds affect the growth of crops?​

Q. Given below are statements about the harmful effects of weeds on crop plants. Choose the correct statements.
(i) They interfere in harvesting.
(ii) They help in the proper growth of crop plants.
(iii) They compete with crop plants for water, nutrients, space and light.

1. iii, ii
2. iii only
3. i, ii, iii
4. i, iii

Q.

Which of the following are used for weeding?

1. Khurpi

2. Weedicides

3. Seed drill

4. All of these

Q. Which of the following is an undesirable plant?

1. Jowar

2. Weed

3. Wheat

4. Rice

Q.

Question 8
Given below are statements about the harmful effects of weeds on crop plants.
(i) They interfere in harvesting.
(ii) They help crop plants to grow healthily.
(iii) They compete with crop plants for water, nutrients, space and light.
(iv) They affect plant growth.

Choose the correct combination of statements.
(a) i, iii, iv
(b) iii only
(c) iii, iv
(d) i, ii, iii, iv

Q. Weeding

Q. The removal of unwanted plants growing along with a desired crop from the field is called __(irrigation/weeding).

Q.

Why do we use chemicals such as sodium benzoate and sodium meta-analysis bisulphate as chemical preservatives? Why don't other chemicals?

Q.

If weeds are also plants do they also perform photosynthesis and release oxygen

Q. The best time for removal of weeds is before they produce flowers and seeds.

1. true
2. false

Q. Which among the following statements are correct with respect to weeding?

1. Weeding is a necessary step in agriculture.
2. Weeding is the process of removal of weeds.
3. Weeding should be done before weeds mature.
4. Weeding is only done manually.

Q. Weeding is the process of removal of weeds after it has matured.

1. True
2. False