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Reports a concerted interinstitutional attempt to generalize the use of the available draught animal power for the construction of more effective soil surface drainage. The hypothesis is that the relatively high productive potential of the Ethiopian highland vertisols, particularly in high-rainfa...


Jutzi, S.C.Mohamed-Saleem, M.A.[Improving productivity on highland Vertisols: The oxen-drawn broadbed maker]Improving productivity on highland Vertisols: The oxen-drawn broadbed maker

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