Timely harvesting and the correct processing of roots and herbs is an important link to ensure their high yield and quality. The following describes the harvesting techniques of several rhizome herbs: 1. Campanulaceae is also known as the flower of thistle, perennial herb and root medicine. It is generally harvested in the second and third years after sowing. At the end of autumn or early spring, excavate underground roots, shake off dirt, scrape off rough skin with tiles or glass pieces, wash, dry, or go to the top of the head to dry. 2. Amber bamboo alias bell dish, jade ginseng, also called wilt (tail). Herbs perennial, rhizome medicine. In the two or three years after planting, excavation will be carried out in spring and autumn. After digging, the stems and fibrous roots of the ground shall be cut off, washed, and dried until the surface turns from white to yellowish. After a period of time, rub it with your hands and soften it to spread the sun. This is repeated, so that no hard core in the root stem, dried into a yellow translucent can be. 3, to yellow, not to name Huaiqing yellow, perennial herb, rhizome medicine. It was excavated in the early October to November of the year of sowing. Dig up the roots, wash the soil, and dry the water to make it bright yellow; dig up the roots, shake the soil (not washed), slowly bake it with fire, dry gradually, form black, and the whole body is soft and the skin becomes hard. For rehmannia, it can also be sliced ​​and dried. China Agricultural Network Editor