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自从本刊1964年第3期发表了《应用大田简法调查豆科根瘤菌的有效性和固氮量》一文后,许多读者来信询问更具体的方法,特再请原作者补充如下——编者。
Since the 3rd issue of the journal, published in 1964, “Investigating the Effectiveness and Amount of Nitrogen Fixation of Rhizobium Leguminosae Using the Field Method”, many readers asked for more specific methods.