颁布单位：[University of the Free State] |  颁布时间：2007 |  实施时间：2007 |  学科分类：[["Water, salinization, --, South, Africa","Irrigation, farming, --, Economic, aspects, --, South, Africa","Soil, management, --, South, Africa","Thesis, (Ph.D., (Agricultural, Economics))--University, of, the, Free, State,, 2007"]]

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