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山西省农业科学院土壤肥料研究所张中星等从1991年开始研究玉米施锌、锰配合肥的增产效果,结果以1hm~2施锌、锰配合肥
Soil and Fertilizer Institute of Shanxi Academy of Agricultural Sciences Zhang Zhongxing from 1991 began to study the application of maize zinc, manganese fertilizer production results, the results of 1hm ~ 2 zinc, manganese fertilizer