1. Ditch method: Dig a ditch with a depth of 1 meter, a width of 1-1.5 meters, and a length depending on the storage capacity in a high-drying terrain, well-drained, and shaded shelter. The bottom of the ditch is first covered with a layer of 10 cm thick clean wet sand. The humidity of the sand is formed by hand but not water. Then spread a layer of walnut sand, filling the wet sand between the wall and the walnut, leaving no gaps. About 20 centimeters away from the mouth of the ditch, the wet sand is then covered with the ground. The soil on the sand is ridge-shaped and its span is greater than the width. Gutters open drainage ditch around to prevent the rain from infiltrating too much, resulting in high humidity and poor walnut quality. When the length of the ditch exceeds 2 m, a tightly-knitted straw shall be used for ventilation at intervals of 2 m when storing the walnuts, and the height of the grass shall be such that the roof is exposed. 2. Sand storage method: on the ground in a cool room, lay a layer of disinfected rice straw, wheat straw, etc., then lay a layer of 10 cm thick wet sand, put a layer of walnuts on a layer of sand, and the stack height should not exceed 1 The thickness of the top wet sand layer is 20-30 cm. Keep the top sand moist during storage.
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