Question

What are weeds? How do they affect crop yield? How can you reduce it?

Answer 1

weeds are unwanted plants in the cultivated fields.
they tend to compete with the crops for water, nutrients, space and light. thus, they take up all the nutrients and reduce the growth of crops in various ways.
weeds can be removed or reduced by- uprooting, ploughing and spraying weedicides

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Answer 2

Weeds are unwanted plants that grow along with the crops.
Weeds use the nutrition of crop plants for their purposes like for growth.
It can be reduce by manually or by using fertilizer .
By manually it can be reduce by pulling the weeds by hand or by using a trowel.
And it can be reduce by using weedicides .
.... I hope it will help you
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