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去年冬天,笔者在农村搞技术承包工作中,看到了不少温室黄瓜、西葫芦缺素症十分严重,影响着瓜类生产和瓜农效益。据我诊
Last winter, the author engaged in technical contracting work in rural areas, saw a lot of greenhouse cucumber, zucchini deficiency is very serious, affecting the production of melon and melon farming benefit. According to my diagnosis