Darwin, a famous biologist, pointed out that earthworm is the most valuable animal on the earth, and earthworm is a potential soil biological resource. However, it is still in the 1930s and 1970s that people really realized its utilization value. The breeding and utilization of earthworms has gradually developed into a new industry. At present, the cultivation and utilization of earthworms has attracted great attention from all sides again. In China, 27 provinces and cities have carried out experimental research and production of earthworm cultivation and utilization. Japan, the United States, Canada, France
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