Answer :

Weeds contain different spines secreting poisonous and toxic substances but same thing does not happen in case of weeds.

Weeds affect crop yield in an adverse manner. They compete with the crop for space, sunlight, nutrients, water and thus affect the growth of crop in an adverse manner. Since, crops do not get enough space, nutrients; water due to weeds their growth is retarded and thus yields is also reduced.


Weeds are removed by the following ways:


By using herbicides weeds can be removed.


By mechanical method of removing weeds manually.


By adopting crop rotation and growing crops timely.


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