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为加强林业生产管理,不断提高育苗、造林质量,锡林郭勒盟决定恢复一九六六年前行之有效的幼林幼苗成活率调查工作制度。即每年八月中旬到
In order to strengthen the management of forestry production and continuously improve the quality of nursery and afforestation, the Xilin Gol League decided to resume the investigation system of effective survival rate of young seedlings before 1966. That is, in mid-August every year