This method is suitable for the storage of citrus, ginger, sweet potato and other cold-sensitive products. To build the kiln method: dig a wellbore with a diameter of about 1 meter from the ground, 3-4 meters deep, and then dig from the bottom of the well one to several storages about 1.5 meters high, 3-4 meters long, and 1-2 meters wide. The caverns and caverns are arched on the top and the bottom is horizontal or slightly sloped. The wellhead should be surrounded by soil and covered, digging drains around to prevent water ingress. Characteristics: Affected by the temperature, with the use of underground soil to maintain temperature, the deeper the kiln the higher the temperature, the more stable. It only has the wellbore connected to the outside world as a ventilation area. The depth of the well kiln depends on the storage, and the kiln bottom temperature should be consistent with the appropriate storage temperature of the stored product. Before entering the kiln, it is best to spray with 1%-2% formalin or bleaching liquid, or to combust sulfur at a volume of 1 to 3 grams for a volume of 5 to 10 grams. China Agricultural Network Editor
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