颁布单位：[University of the Free State] |  颁布时间：2006 |  实施时间：2006 |  学科分类：[["Thesis, (Ph.D, (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2006","Rain, and, rainfall, --, Ethiopia","Water, harvesting, --, Ethiopia","Water, conservation, --, Ethiopia","Crop, production, --, Ethiopia"]]

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