颁布单位：[University of the Free State] |  颁布时间：1991 |  实施时间：1991 |  学科分类：[["Corn","South, Africa","Spacing","CERES-Maize, (computer, program)","Forecasting","Dissertation, (M.Sc., (Agronomy)), University, of, the, Free, State,, 1991"]]

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颁布单位：[University of the Free State] |  颁布时间：1991 |  实施时间：1991 |  学科分类：[["Dissertation, (M.Sc., (Soil, Science))--University, of, the, Free, State,, 1991","Irrigation","Soil, structure"]]

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颁布单位：[University of the Free State] |  颁布时间：1991 |  实施时间：1991 |  学科分类：[["Dissertation, (M.Sc., (Chemistry))--University, of, the, Free, State,, 1991","Flavonoids"]]

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