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去年市农科所对静海县五个公社九个大队通过深翻改良盐碱地的情况进行了调查,并取土样作了有关物理、化学性质分
Last year, the Agricultural Science Institute investigated the situation of nine brigades of the five communes in Jinghai County through deep inversion of saline-alkali lands and took soil samples for physical and chemical characterization