Weeds are basically plants that grow where they are not wanted. Unwanted plants like them compete with crops for nutrients, water, and light, which can affect the crop yield. In order to help farmers, pull off weed from the soil, we can come up with a power weeder. Rotary Weeder is machine used for mechanically removing weeds. It is beneficial to farmers who use a minimal amount of herbicide. To weed one hectare by hand requires about 25 days of work alone. With rotary weeder, farmers can weed three rows at a time, it is easy to operate, and it is light in weight.