Question

plz answer all from Q.3 to Q.6

Answer 1

weeds are certain undesirable plants grow along with crop in the field
weeds will reduce crop yield
it will compete for water, mineral , space and sunlight
to reduce it we should use weedicideslike dalapon,metachlor,picloram,etc.
hope it helps u

Answer 2

3) The harmful plants, that grow along with the crop are called weeds. They are harmful for crops because the compete for water and light and thus affect the production.
The ways which farmer follow to remove weeds are:
Manual removal: weeds can be removed by uprooting unwanted plants with the help of trowel (khurpi) or borrow.
Tilling before sowing: ploughing the field before sowing the seeds uprooted the weeds.
Weedicides: These are chemicals which kill the weeds but do not harm the crops.
Hope it helps you!