烟田土壤养分迁移规律研究Ⅱ.中微量元素的迁移规律
연전토양양분천이규률연구Ⅱ.중미량원소적천이규률
Investigation into the movement of mineral fertilizer in tobacco field Ⅱ.The movement of magnesium,boron,zinc,copper and chlorine
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