Rehmannia (Processed Land, Rehabilitation) Since the beginning of this summer, prices have risen steadily, causing widespread concern among drug farmers. There will be new production of existing cropland. At present, many farmers (especially the first-time growers) have asked how to process yellow crops to make qualified products. To this end, the method of ground yellow roasting is described below for reference. Ground yellow is generally harvested from frosty to frosty period. The tubers are first picked up and shaken to remove dirt, except for the base leaves and small tubers and fibrous roots that are not suitable for processing. Then they are divided into large, medium and small grades. If there is sun, Then spread out for a few days and then bake in the oven. Building a furnace: Before baking, on the side of the room facing the wall, use a brick oven with a height of 116 cm, a width of 117 cm and a length of 226 cm. Open a small fire wall at the root of the wall and dig a height of 30 cm in the middle of the outer wall. 30 cm wide craters are connected together to create a small earth stove that can be used for coal burning. After the fire path is built, 6 to 9 wooden rods shall be placed on the inner side of the oven at a distance of 90 cm from the floor, and the sparse bamboo curtains shall be laid on the rods. Baking: 200 to 300 kilograms of fresh yellow are placed in a built furnace. When it is first introduced into the furnace, it is baked at a temperature of about 50°C for 2 days. After the stack is baked, it can be baked at 70°C to 75°C. When the temperature is 7 to 80%, the temperature is controlled. Reduced to 40 °C ~ 45 °C. Ground yellow is baked into the oven (turning once in 2 days, turning twice a day after the temperature rises, then picking up the dry goods (turning the surface to the top, the heart has no hard-heartedness as the standard). After drying, it is taken out from the fire oven, stacked, external sacks or straw mats are used to cover the sweat for 3 to 4 days, so that the internal water seeps out and the surface is wet and dry. Stove into the oven to open the baking, when the temperature is maintained at about 50 °C, turning while baking, dry enough to remove.General production per mu 300 ~ 400 kg, high yield up to 400 ~ 500 kg.
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