Take 5 kilograms of soybeans, soak them in water until they swell, then grind them into a fine paste. Mix the ground soybeans with 10 kilograms of rice bran to form a uniform mixture. Transfer the mixture into a large tank or barrel, ensuring the container is tightly sealed. Place it in direct sunlight for fermentation—approximately 3 days during summer and up to 7 days in autumn and winter. This fermented mixture can be used as feed for 20 to 30 fresh oysters or for 500 chickens (or ducks) over the course of one week. The process enhances the nutritional value of the feed, making it more digestible and beneficial for animal growth. This method is commonly used in small-scale farming and is an effective way to recycle agricultural by-products into high-quality animal feed.
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