Bahar city is located at the distance of nineteen km in the northwest of Hamadan. Due to alluvial soil, this city has an appropriate situation for farming. The vast majority of its farming production belongs to potato. The most reputation of this city is because of harvesting and producing potato. Potato is a one-year plant and we use its glands which are inside of its root. Potato was produced in the South America for the first time. It is full of Betakaron and it will be absorbed into the body after cooking. Potato's stem and leaves consist of a poison called Solanin.