General tanning method: sweep the leaves on the ground into a pile, add appropriate amount of goldfish starter, sprinkle appropriate amount of water, add 1% urea, cover with thick plastic film, and stack it for 15-20 days. If the petiole is removed, it can be used as a substrate for soilless cultivation. If a small amount of fine sand is blended in, soilless culture substrates will work better. It can also improve the soil better, such as increasing the organic matter content and permeability of sticky soil.
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