First, the phytotoxicity vegetable seedlings are small and tender, with poor drug resistance. In the application of pesticides, if the method is improper, it is easy to produce phytotoxicity. There are three main reasons for the occurrence of phytotoxicity: one is improper selection of pestici…

Weaned piglets are piglets that are weaned from 3 weeks of age to 5 weeks of age to 10 weeks of age. Piglet weaning is another strong stimulus since birth. The first is the change of nutrition, which is changed from eating warm liquid breast milk to eating solid dry raw feed; second, changing …

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