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近年来,在本区(黄土区,下同)几种土壤上进行铜肥肥效试验,并测定几种耕作土壤中全铜和有效铜的含量,现将有关资料整理于下.
In recent years, in this area (loess area, the same below) several kinds of soil fertilizers on the effect of copper fertilizer and determination of several tillage soil copper and copper content, the relevant information is now sorted into the next.