Question

7. Assertion (A): Weeding is an important process of crop production.
Reason (R): Weeds compete with the crop plants for nutrients and space.
O Both A and Rare true and Ris the correct explanation of A.

O Both A and R are true but R is not the correct explanation of A.

O A is true but Ris false.

O Both A and Rare false.​

Answer 1

Explanation:

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Weeds are unwanted plants. They grow with crops. They compete for nutrients and water with main crop. So weeds are very harmful. Process of controlling the weed is called weeding. Weeding is done manually by using khurpi and by using mechanical machines. Weeds are also controlled by using some chemical substances like 2, 4-D. These chemicals are called weedicide and used to kill and destroy the weed.

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Answer 2

Concept: Unwanted plants known as weeds commonly coexist with the primary crop in agricultural fields. They are a fierce and dominant rival for major crops. They generally compete for ingredients that are necessary for the crops to grow and thrive.

Solution:

Weeding is the practise of removing or controlling undesired plants or weeds. They are essential because they have an impact on both the plant's growth and the availability of nutrients to the soil. In addition to space, weeds compete with the main plant for nutrients and water.

Weeds destroy the primary crop because they are unable to obtain the right quantity of nourishment from the soil, and they do this by absorbing nutrients from the soil as well.

Similar harm is done to the primary plant by light, water absorption, and weeds taking up space.

If weeding is done by handpicking, it also aids in loosening the soil.

Common weeds include grass, algae, amaranthus, chenopodium, Xanthium, parthenium, etc. Weeding can also be done with the aid of herbicides like MCPA, 2,4-D, etc.

In addition to lowering crop productivity, weeds can occasionally act as disease vectors.

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The most popular and successful weeding methods nowadays are herbicides and weedicides. They can also be used at three different times, such as before, after, and after the emergence of weeds. The use of weedicides may result in health risks and environmental problems.

Therefore first option, Both A and R are true and R is the correct explanation of A is the correct answer.

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