Weeds are harmful to crops because they compete for essential resources like sunlight, water, nutrients, and space, thereby reducing the growth and yield of the desired crop. They can also harbor pests and diseases, further damaging the crop. Two methods of weed control include: 1) Manual weeding: This involves physically removing weeds by hand, using a khurpi, or by tilling the soil. It is effective for small areas but labor-intensive. 2) Chemical weed control: Farmers use specific chemicals called weedicides (e.g., 2,4-D) to kill weeds without harming the main crop. This method is efficient for large fields but requires careful application to avoid environmental harm.