颁布单位：[University of the Free State] |  颁布时间：2014 |  实施时间：2014 |  学科分类：[["Zinc, source","Extraction, method","Plant, parameters","Uptake","Concentration","Dissertation, (M.Sc.Agric., (Soil,, Crop, and, Climate, Sciences)--University, of, the, Free, State,, 2014","Fertilizers, --, Africa,, Southern","Corn, as, feed","Soil, fertility, and, fertilizers."]]

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颁布单位：[University of the Free State] |  颁布时间：2013 |  实施时间：2013 |  学科分类：[["Climate, --, South, Africa, --, Free, State","Climatic, changes, --, Africa,, Southern","Weather","Thesis, (Ph.D., (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2013"]]

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