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2
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An evaluation of mulch on cultivated land in two on-farm trials in Western Gojam, Dega Damot Awraja (Anjeni, SCRP) / Berhanu Fentaw.
- University of Berne [etc.],
- 1991.
- Berne :
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Aspects of soil degradation and conservation measures in Agucho catchment, Western Harerge / Thomas Tolcha.
- University of Berne [etc.],
- 1991.
- Berne :