Class 8 science chapter 1 question 40-43

40. Question
How are weeds removed from the crop ϐields ? Name one implement
used for weeding.
Answer
The removal of weeds from the crop ϐields is known as weeding. It is
necessary process as weed competes with the crop plants for water,
nutrients and space. Farmers adopt many ways to remove weeds and
control their growth. The various ways by which weeds are removed
from the crop ϐields are-
(i) With hand – In this method, weeds are removed manually by
uprooting or cutting them close to the ground.
(ii) By using a khurpa – In this method, weeds can be removed by using
a implement called khurpa.
(iii) By using weedicides- Example- 2, 4-D
41. Question
If wheat is sown in the kharif season, what would happen? Discuss.
Answer
If wheat is sown in the kharif season, it will not grow well as plants
cannot tolerate too much water of the rainy season.
42. Question
Which of the following are kharif crops and which are rabi crops ?
Wheat, Paddy, Gram, Maize, Mustard, Cotion, Soyabean, Linseed, Peas,
Groundnut
Answer
Add caption
43. Question
What is a crop? Give two examples of crops.
Answer
When plants of the same kind are grown and cultivated at one place on
a large scale, it is called a crop. Examples- Wheat and Maize.

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