•Weeds are undesirable plants which are gown along with crop plants.

•Examples of weeds are bathua, chenopodium, chaulai.

•They compete with crop for space, nutrients and sunlight.

•Some weeds interfere even in harvesting and may be poisonous for animals and human beings.

•Hence, weeds are to be removed from the crop field.

•Farmers undertake many methods to remove weeds and control their growth.

(a) Tilling before sowing of crops helps in uprooting weeds and they get mixed with the soil after decomposition.

(b) Manual removal of weeds with the help of khurpi by uprooting or cutting them close to the ground from time to time.

(c) A seed drill is also used to uproot weeds.

(d) Weeds are also controlled by using certain chemicals called weedicides such as 2,4-D are used to control weeds. Weedicides are sprayed in the fields to kill the weeds.