write two ways to removing weeds
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Three ways to remove weeds from a crop field:
By hand. Walking the field and pulling out the weeds.
By mechanical means. Pulling iron through the field that will till up the space between the crop rows and cut/kill the weeds.
By chemical means. Using a herbicide to kill the weeds.
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ANSWER :
Mechanical and physical methods of weed control include hand pulling, digging, howing, mulching etc.
Biological control include using insects or pathogens for killing the weeds.
Chemical control include using chemicals such as weedicides.
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