Collect the excrement discharged by a cow in a day, add 15kg bran, 2.5kg wheat flour and 3.5kg distiller's yeast, and then add water to form a ball, which can be easily dispersed and mixed when released, and put it into a plastic bag or sealed in a jar. It takes 1-3 days in summer, 5-7 days in spring and autumn, and 10-15 days in winter to ferment it. Fermented cow dung is soft, odorless, yellow, with sour taste. Fermented cow dung mixed with 35kg chicken ration can feed 350~400 chickens for two days
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