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1992

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An economic evaluation of crop rotation systems under centre pivot irrigation in the Southern Free State sub-area

颁布单位：[University of the Free State] | 颁布时间：1992 | 实施时间：1992 | 学科分类：[["Irrigation, farming","Crop, rotation, --, Economic, aspects","Dissertation, (M.Com., (Agricultural, Economics))--University, of, the, Free, State,, 1992"]]

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