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Demelash, Nigus ,  Bayu, Wondimu ,  Tesfaye, Sitot ,  Ziadat, Feras M. ,  Sommer, Rolf ,  [Current and residual effects of compost and inorganic fertilizer on wheat and soil chemical properties] ,  Current and residual effects of compost and inorganic fertilizer on wheat and soil chemical properties

Margenot, Andrew J. ,  Paul, Birthe K. ,  Sommer, Rolf ,  Pulleman, Mirjam ,  Parikh, Sanjai ,  Fonte, Steven J. ,  [Can conservation agriculture improve phosphorus (P) availability in weathered soils? Effects of tillage and residue management on soil P status after 9 years in a Kenyan Oxisol] ,  Can conservation agriculture improve phosphorus (P) availability in weathered soils? Effects of tillage and residue management on soil P status after 9 years in a Kenyan Oxisol

Bolo, Peter Omondi ,  Sommer, Rolf ,  Kihara, Job ,  Kinyua, Michael ,  Nyawira, Sylvia ,  Notenbaert, An Maria Omer ,  [Rangeland Degradation: Causes, Consequences, Monitoring Techniques and Remedies] ,  Rangeland Degradation: Causes, Consequences, Monitoring Techniques and Remedies