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正确地计算二晚播种期,是避过寒露风、四代螟虫和减少五代稻纵卷叶虫、五代稻飞虱、六
Calculate the two sowing time correctly, is to avoid the cold dew, the fourth generation of stem borers and reduce the fifth generation of the Yangtze roller leaf worms, five generations of planthoppers, six