Write four methods of weed control.

(N/A) $(i)$ Mechanical removal: This involves using tools like harrows or hoes,or physical removal by uprooting or cutting weeds close to the ground.
$(ii)$ Preventive methods: These include proper seedbed preparation,timely sowing of crops,intercropping,and crop rotation to prevent weed growth.
$(iii)$ Tilling: Tilling the soil before sowing crops helps in uprooting and killing existing weeds.
$(iv)$ Biological control: This involves growing specific crops or using natural predators that compete with or inhibit the growth of weeds.